Page 1

INSTRUCTION MANUAL
Type
1383
Random-
Generator
A
GENERAL
Noise
RADIO
Page 2

Contents
SPECIFICATIONS
INTRODUCTION-
SECTION 1
INSTALLATION-
SECTION 2
PROPERTIES OF
RANDOM
NOISE-
SECTION 3
PRINCIPLES OF
OPERATION-
SECTION 4
OPERATING
PROCEDURE-
SECTION 5
APPLICATIONS-
SECTION 6
SERVICE
AND
MAINTENANCE-
SECTION 7
PARTS LISTS
AND
DIAGRAMS-
SECTION 8
WARRANTY
We
warrant
that
each
new instrument manufactured and sold
by
us
is
free
from
defects in material
and
workmanship
and
that, properly used,
it
will
perform in
full
accordance
with
applicable specifications
for
a period
of
two
years after original
shipment.
Any
instrument
or
component
that
is
found
within
the two-year period
not
to
meet these standards after examination
by
our
factory,
District
Office,
or
authorized repair agency personnel
will
be
repaired or, at
our
option,
replaced
without
charge, except
for
tubes or batteries that
have
given normal service.
©GENERAL RADIO COMPANY 1969
West
Concord,
Massachusetts,
U.S.A.
01781
Form
1383-01
00-A
February,
1969
ID-0100
Page 3

Specifications
Spectrum: Fl
at
(constant
energy
per
hertz
of
bandwidth)
± 1
dB
from
20
Hz
to
10
MHz, ± 1.5
dB
from
10
MHz
to
20
MHz.
Waveform: T
able
shows
amplitude-density-distribution spe
cifi
ca-
tions
of
generator compar
ed
with the Gaussian
probabi
lily-density
function
, as
measured
in a "window" of
0.2
o, cent
ered oo the
i
ndicated
values
:
Voltage
0
±a
± 2a
± 3a
Gaussian
Prob
.
Den
s.
Fun
ction
0.0796
0.0484
0.
0108
0.000898
Am
plitude-
Density Dist. of
138
3 Random-Noi
se
Gen.
0.079
6 ±
0.005
0.0484
± 0.
005
0.0108
± 0.
003
0.
000898
± 0.
000
3
(a
is
the
standard
deviation
or
rms
value
of
the
noise
volta
ge.)
Output Voltage:
At
least
1 V
rms max ,
open
circuit
.
Output Meter:
Indicates
open-circuit
output voltage
ahead
of
500
.
MlHR
fUll
Sf.Alt
Output Impedance:
500
. Can
be
shorted
without
causing disto
rtion
.
Amplitude Control:
Continuous
control
and
8-step,
10
dB-per-step
atten
uator.
Output Termin als:
GR874
<E
coaxial
connector
that
can
be
mounted
on e
ith
er fr
ont
or
rear pa
nel.
Accessories
Supplied: S
pare fuses,
lamp,
power
cord
.
Power Required: 100
to
125
or
200
to
250
V,
50
to
400
Hz ,
40
W.
Dimensi
ons
(width x height x depth): Benc
h: 17 x 37/a x 12
3/4 in.
(435 x
99 x 325
mm); rack,
19 x 3
1/2
x 103/4 in.
(485 x 89 x 275
mm).
Weight:
Net,
14
lb (6.5 kg);
shipping.
21
lb
(10
kg) .
Catalog
Numb
er
1383-
9700
1383-9701
Des
cription
Bench
Model
Rack
Model
Handbook
of
Noise Measurement
This 282-page book, by Dr.
A.
P.
G.
Peterso
n and Ervin
E. Gross, Jr
.,
of the
General Radio Engineeri
ng
Staff, covers thoroughly the subject
of
noi
se
and vibrat ion
measu
rement Copies are
ava
ilable from Gener
al
Radio
at
$2.00
eac
h, postpaid in the United
States
and Canada.
Page 4

Introduction-Section
1
1.1 PURPOSE ......
. .
..
..
. . .
.. ..
. .
.
1
·1
. 1-1
.
1-1
.
1-1
.
1-1
1.2 DESCRIPTION
...
.
......
.
.......
.
1.3
CONTROLS,CONNECTOR S
AND
INDICATORS
.
1.4 ACCESSORIES SUPPLIED .
1.5
ACCESSO
RIESAVAILABLE
...
...
....
.
1.1
PURPOSE.
Th e Type 1383 Random-Noise
Gen
erator (Figure 1-1)
provid
es
a high level
of
electri
cal
noise at its
output
termi-
nals.
This type
of signa
l is useful in testing video- and radio-
fr
equency
systems
for
operation in the pr
esence
of
noise,
an
d for measurement
of
th e noi
se figu
re
of
such
systems.
The noise
si
gnal
can
be
used
directly, or
it
can
be
used
to
modulate the
output
of a
signa
l generator.
It
is
useful in
making
cr
ossta
lk
measuremen
ts and in determining the ef-
fective bandwidth
of
filters.
The 20-Hz to 20-MHz band-
width
of
th e noise makes
it
useful
for
even
wide-band video
systems.
1.2 DESCRIPTION.
Th e 1383 Random-Noise Generator consists
of
a therm-
ionic diode noi
se
source
with all-
semiconductor
ampli fi
ers
and
power supply. The noise
output
is useful
ove
r the fre-
qu
ency r
ange
from
20
Hz
to 20 MHz. Th e noise
output
am-
plitude
is
indicated by a meter on the
front
panel, and
an
output att
enuator permits reduction
of
the out
put
by a
total
of
80 dB in 10-dB st
eps
from a max imum
of
1 V, r
ms,
open ci rcuit. The outpu t imped
ance
is 50S1
.
1.3 CONTROLS, CONNECTORS
AND
INDICATORS.
The control
s,
connectors and indicators
on
the
front
and
r
ear pan
els
of
th e 1383 Random-Noise Generator are I isted
and d
esc
rib
ed
in Tabl
es
1-1
and 1-2, respectively.
The OUTPUT
connector on the
front
panel
is
a G R87
4®
coaxial connector.
If
desired,
it
may
be
removed
from
th e
front
panel and mount
ed
on the rear
of
the instrument. A
snap-
in hole cover (P/N 0480-2470) at the rear should
be
moved
to the front
if
this
change is made,
to
cover the hole
in the
front
panel.
1.4 ACCESSORIES SUPPLIED.
The
accessories
suppli
ed
with the Generator are listed in
Table 1-3.
1.5 ACCESSORIES AVAILABLE.
A Rack Adaptor Set (P/N 0480-9702) is
ava
ilable
to con-
vert the portable bench model
for
mounting in
an E lA
standard 19-inch relay rack. (Refer
to para
graphs 2.3 and
2.4.)
Also
availab
le are various patch cords and adaptors, some
of
whi
ch
are listed in Table 1-4.
GR87
4-G
coax i
al
fixed atten
uators
can
be
used
to reduce
th e
output
beyond the r
ange
of
th e attenuat or in the instru-
me
nt. Units are
avai
lable
with
attenuation values
of
3, 6,
10, 14,
and 20 dB.
INTRODUCTION
1-1
Page 5

3
4
5
6
Figure 1-1. Type
1383
Random-Noise Generator.
Table
1-1
Controls, Connectors, and Indicators on the
Front
Panel
FIG. 1-1
NAME
TYPE
POSITIONS
I
FUNCTION
REF
.
1 POWER 2-position toggl e switch
OFF, POWER Energizes lnstrumerrt.
2
------------
Pilot
lamp --------------------
Indicates when instrument
is
ene
rgi
zed.
3
-----------
Meter
--------------------
Indicates open-circu
it
output
volta
ge.
4
OUTPUT LEVEL
Continuous rotary
----------------------
Varies
output
voltage.
cont
rol
5
METER
FULL
9-position
rotary
1.0, 0.3,
0.1'
0.03,
Attenuates
output
in 10-
SCALE selector
switch
0.01' 0.003, 0.001'
dB steps.
0.0003, 0.0001
6
OUTPUT
50 D
GR874®coaxial
-------------
Connection
to
gene
rat
or
output.
connector and ground
jack
1-2
INTRODUCTION
Page 6

FIG.
1-2
REF.
2
3
4
5
6
2 3
4
5 6
Figure 1-2. Rear panel
of
the
Generator, showing
controls
and connectors.
Table 1-2
Controls and Connectors
on
the
Rear
Panel.
NAME
OUTPUT
3/
10 A
6/10
A
QUANTITY
2
TYPE
I
POSITIONS
l
FUNCTION
(The OUTPUT connector on the
front
panel
can
be
moved
to
this
location on the r
ear
panel.)
Extraction-post fuse
holder
Extraction-post fuse
holder
Screwdriver-operated
slide switch
3-terminal
male
connector
Table 1-3
100-125,
200-250
Accessories Supplied.
(Refer also
to
Parts List.)
ITEM
GR
PART
NO.
Power Cable, 7-foot,
4200-96L2
3-wire
Spare
Fuse
(0.3
A,
5330-0800
Slo-Bio)
Spare
Fuse
(0.6
A,
5330-1100
Slo-Bio)
Spare Pilot Lamps 5600-0300
Holds
3/10
A fuse
(Sio-Bio).
Holds
6/10
A fuse
(Sio-Bio)
.
Selects proper range
of
line voltage.
Line-power
input
connection.
INTRODUCTION
1-3
Page 7

Table 1-4
Some
of
the many coaxial patch cords, adaptors,
and
other
accessories
available
for
use
with
the Generator (cables
are
approximately three feet long.)
GR
GR
PART
CATALOG
NUMBER
DESCRIPTION
NUMBER
Cables
874-R22A
GR874
to
GR874
0874-9682
874-R22LA
GR874
to
GR874,
0874-9683
locking connectors
1560-P95
Phone
plug
to
double 1560-9695
banana
plug
776-B
GR874
to
BNC
(plug)
0776-9702
Adaptors, non-locking
874-0BJA
GR874 to
BNC
(jack)
0874-9700
874-0BPA
GR874
to
BNC
(plug)
0874-9800
874-0UJ
GR874 to UHF (jack) 0874-9718
Adaptors, locking
874-0BJL
GR
874 to B
NC
(jack)
0874-9701
874-0BPL
GR874
to
BNC
(plug) 0874-9801
874-0UJL
GR874
to
UHF (jack)
0874-9719
874-02
GR874 to binding posts
0874-9870
Fix
ed
Attenuators, non-locking
874-G3
3
dB
0874-9564
874-G6
6
dB
0874-9568
874-G10
10
dB
0874-9570
874-G14
14
dB
0874-9568
874-G20
20
dB
0874-9572
Fixed attenuators, locking
874-G3L
3
dB
0874-9565
874-G6L
6
dB
0874-9569
874-G10L
10
dB
0874-9571
874-G14L
14
dB
0874-9561
874-G20L
20
dB
0874-9573
Miscellaneous,
non-locking
874-W50B
Termination,
50
D.
0874-9954
874-T
T
ee
0874-9910
874-X
Insertion
Unit
0874-9990
874-TPD
Pow
er Divider 0874-9912
Miscellaneous,
locking
874-W50BL Termination,
50
D.
0874-9955
874-TL
Te
e 0874-9911
874-TPDL
Pow
er Divider
0874-991 3
1-4
INTRODUCTION
Page 8

Installation
-Secti
on
2
2.1 DIMENSIONS
.......
.
2.2 BENCH
MODEL
......
.
2.3
RELAY-RACK
MOUNTING.
2.4
MOVING
THE OUTPUT
CON
NECT
OR
2.5 CONNECTING THE POWER . .
...
.
2.1
DIMENSIONS.
The dimensions
of
the 1383
are
shown in Figure
2-1.
~
19
--,
I
.
2-1
.
2-1
. 2-2
. 2-2
. 2-2
r
~
0
g
/01
~
u
-:
~
0
n
~
_j
RACK
MOUNT
HANDLES ON RACK
MOUNT ONLY
~
RACK ONLY
f
'~
r
1-
124
I
17
----
I
I
g
[0j
~
~
~
.,..---
(0
0
I~
~
0
\
~)
LJ
_i
r2
t-
:.=:J
c::t=
I
BENCH
.d
~
~L
8
12
Figure 2-1.
Dimensions
of
the
Generator
in inches.
2.2 BENCH MODEL.
The 1383-9700 (bench model) Random-Noise Generator
TABLE
2-1
is
delivered completely assembled in a metal
cab
inet, ready
for
bench
use.
A convenient bail, located between the
front
feet,
can
be
pull
ed
down
to
raise
the
front
of
the instrument
PARTS
INCLUDED
IN
RACK
ADAPTOR
SET
P/N 0480-9702
and provide a better view
of
the control settings.
To
convert the bench model
for
relay-rack
use,
proceed Fig.
2
·
2
No
.
Ref Used
as
follows
(see
Figure 2-2) :
a.
Order
an
0480-9702 Rack
Adaptor
Set.
Table
2-1
G 2
lists the parts included in the
Set.
b.
Loo
sen
the
two
captive 10/32 screws
(5,
Figure
1-2)
in the rear
of
the cabinet
until
the instrument
is
free; slide
the instrument forward,
out
of
the cabinet.
c. Remove the
four
rubber feet
from
the cabinet. Sim-
ply
push
out
the
two
rear feet. Spread the bail (A, Figure
2-2) slightly , and the
two
front
feet (B) and the bail
will
drop out.
Be sure
to
save
all parts
as
they
are
removed
for
possible reconversion
of
the instrument
to
bench mounting.
d. Pierce and push
out
the plugs
from
the
four
bosses
D
E
Item
Rack-Adaptor Assemb li
es
(handles)
Hardware
Set
includes
8
Screws,
BH
10-32,
5/16"
(only 4 requ ired)
4 Screws, BH 10-32,
9/16"
with
nylon cup washers
GR
Part
No
.
0480-4902
0480-3080
INSTALLATION
2-1
Page 9

D
J.._!!J!:x
F~~
.ti '
Figure 2-2.
Method
of
mounting the Generator in a relay
rac
k.
(C)
on the inner
sides
of
the cabinet, near the front. Do
not
damage the threads in the threaded holes.
Push
from
inside
the cabinet.
e.
Attach one Rack
Adaptor
Assembly (handle)
to
each
si
de
of
the cabinet,
as
shown, using
two
5/16-inch screws
(D) in
each
. Note that the screws enter in opposite direc-
tions, one
from
insid e the cabinet and one
from
outside.
Use
the upper and lower holes in the assemblies.
f. Install the instrument in the cabinet and lock
it
in
place
with
the
two
captive screws through the rear panel
that
were loosened in step
b.
g_
Slide the entire assembly
into
the relay rack and lock
it
in place
with
the
four
9/16-inch screws (E)
with
captive
nylon
cup washers.
Use
two
screws on
each
side and tighten
them by inserting a screwdriver through the
holes (F) in the
handles.
To
reconvert the instrument
for
bench
use,
reverse
the
above procedure.
2.3 RELAY-RACK MOUNTING .
The 1383-9701 (rack-mounted) Random-Noise Genera-
tor
is
delivered completely assembled in a metal cabinet
ready
for
mounting in
an
EIA
standard 19-inch relay rack.
(If desired, the OUTPUT connector on the
front
panel
of
the relay-rack mode l
can
be
moved
to
the rear panel. Refer
to paragraph 2.4).
To
install the rack model in a relay rack, slide the instru-
ment (in its cabinet)
into
the rack and lock
it
in pl
ace
with
the
four 9/16-inch scr
ews
(E, Figure 2-2)
with
captive nylon
cup washers.
Use
two scr
ews
on
each
side and tighten them
by inse
rtin
g a screwdriver through the holes (F) in the
handl
es.
To
convert the rack model
to
a bench model, remove the
ra
ck-adaptor
set
by reversing the procedure
of
paragraph
2.2.
2-2 INSTALLATION
2.4
MOVING
THE OUTPUT CONNECTOR.
To
move the OUTPUT connec
tor
to
the r
ear
panel
(see
Figure 8-2) •
a. Loosen the
two
capt
ive
screws at the rear
of
the in·
strument (6, Fig. 1-2), and remove the instrument
from
its
cabinet.
b.
Remove and
save
the gray cover plate (P/N 0480-
2470)
from
its hole in the rear panel.
c.
Remove the
four
screws
that
hold th e
OUTPUT
con-
nector in the
front
panel.
d.
Move the connector
to
the rear panel. Pull the rubber
grommets
from
the keyhole-shaped slots they are in, sli
de
them along the cable
as
necessary, and
press
them
into
the
other
slots
so
that the cable
eas
ily reaches
the rear panel
(see
Figure 8-2).
e.
Use
the
four
screws
to
fasten the connector
into
the
rear
panel. (The wider pair
of
outer-conductor contacts
are
usually aligned vertically.)
f.
Press
the
snap
plug removed in step b
into
the hole in
the
front
panel
to
serve
as
a cover.
g.
Place
the instrument back in its cabinet , and tighten
the
two
screws at the rear
of
the instrument.
h.
To
replace the connector in the
front
panel, r
everse
the above procedure.
2.5 CONNECTING THE POWER.
The wiring
of
th e power transformer can be s
wit
ched, by
means
of
the 2-position slide switch (4, Figure 1-2) on the
rear
panel,
to
accept 50-
to
400-Hz line power
of
either
100-125
V or 200-250 V.
Connect
the three-wire power
cab
le ( P/N 4200-9622,
supplied)
to
the line and
to
the 3-terminal male connector
(5, Figure 1-2) on the rear
panel. One 0.3-A fuse and one
0.6-A fuse are
used
for
either line voltage. Power consump-
tion
is
approximately 35
W.
Page 10

•
Properties
of
Random
Noise-
Section
3
3.1
DEFINITIONS
•
••
• 0 0
••
•••
•
3.2 DESCRIPTION
OF
RANDOM NOISE
3.3
AMPLITUDE
DISTRIBUTION
3.4
SPECTRUM
...
.
3.5
STATIONARITY
·
3.6
SUMMARY
· · · ·
3.1
DEFINITIONS.
The acoustical term
"noise"
was
applied originally
to
certain electrical signals
because
of
the undesirable audible ef-
fects th ey produced at the
output
of
radio receiver
s.
Noise, in
the
electrical
sense,
is
now
a broad term that
means
any un-
wanted
signal, and therefore
can
include
not
only
input-stage
noise and atmospheric noise in radio receivers,
but
also
cross-
talk, hum, and distortion.
Random noise
is
a signal whose exact value at any
future
moment cannot
be
predicted.
It
is
even a little
more than
that;
it
means
a signal containing no periodic component
whose
future
value
can
be
'predicted.
Unlike
periodic signals,
whose spectra consist
of
one
or
more discrete lines correspond-
ing
to
the various frequency components, random noise
has
a
spectrum that
is
a continuous function
of frequency, contain-
ing no discrete
line components.
3.2
DESCRIPTION OF RANDOM NOISE.
It
is
only
possible to describe random noise in terms
of
its
average
properties
that
cannot
be
measured instantaneously
but must
be
averaged
over some
finit
e measurement time. The
two
most
important
characteristics
of
random noise
are
its
amp
I itude distribution and its spectrum.
3.3
AMPLITUDE
DISTRIBUTION.
3.3.1
Amplitude
Distribution
Functions.
The instantaneous
value
of
a random noise, at
some
particular instant, cannot
be
predicted,
but
for
many noises
we
can
speak
of
the
probability
that the voltage
will
lie in some
particular
range.
This
probability
is
given by a function called
the amplitude density distribution, p(v).
When
multiplied by
a
voltage increment, dv, this
function
gives
the probability
.
3-1
.
3-1
.
3-1
. 3-3
. 3-4
. 3-5
that, at any given instant, the voltage lies between v and v + dv.
Because
the voltage must exist at some value,
it
follows that
th e integral
~-=
p(v)dv =
1.
Another useful
probability
function
is
the integr
al
over part
of
that range, called the amplitude
distribution,
P(v), defined
as
P(v) =
~
-~
p(x)dx
.
Thus defined,
P(v)
is
the
probability
that the volt
age
, at any
given instant,
lies below the value
v.
The values
of
these prob-
ability
functions lie on a
scale
between 0 and
1,
with 1 de-
noting certainty.
A probabi
lity
of
0.5 denot
es a 50%
chance
of
occurance_
3.3.2 The
Gaussian
Distribution.
The
Gaussian
or
normal
distribution
is
particula rl y im-
portant
for
several reasons:
It
describes the
"normal"
occur-
ran
ee
of
random measurement errors in experiments. The
amplitude
of
thermal noise in a resistance and shot noise in a
vacuum tube
are
Gaussianly distributed. The distribution
of
the
sum
of
many independent time-varying voltages approaches
the Gaussian
distribution
in the
limit
as
the number
of
such
voltages
is
increased, regardless
of
the dist
ribut
ion
of
the in-
dividual voltages
(derived
from
the Central
Limit
Theorem
of
statistics). An extension
of
this reasoning leads
to
the result
that
filtering
that
reduces the bandwidth generally makes a
non-Gaussian noise more Gaussian,
so
that, in this
sense,
the
Gaussian
is a stab
le
distribution. For th
ese reasons,
the
Gaussi-
PROPERTIES OF RANDOM NOISE
3-1
Page 11

an
distributi
on is
of
fundamental importance and
is
the most
ap
pro
priat
e di st
ributi
on
of
random noise in most experiments.
For the
Ga
ussian
distribution,
v2
(_ 1 ) -
2a
2
p(v) =
\.
a.JE
e
and
P(v)
=
~
t + e
rf
(a-/7
)]
where a is the root-
mean-squa
re volta
ge
(in statist
ics,
the
standard de
vi
ation), and e
rf
denotes th e error function. Values
of th
ese
functions are given in Tabl
e 3-1 and t
he
functions
are
graphed in Figur
es
3
-1
and 3-2.
TABLE
3·1
Gaussian
amplitude distribution function
s.
v
p(v)
P(v
)
-
5a
.000 001 48 7 I a
.000
000
287
-
4a
.000 1
33
8/a
.000
031
67
-
3a
.004 43
2/a
.001 350
-2a
.053
99/a
.022
75
-1 a
.241
97/a
.1
58 65
0
.398 94/a .500
00
1a
.241
97/ a .841 34
2a
.053 9
9/
a
.977
25
3 a
.004 432/a .998
650
4a
.000 1
33
8/a
.999
968
33
5 a
.000 001 487
/a
.999 999 713
It can
be
see
n from Figure 3-2 that a
Gaussi
anly distr
i-
buted random noi
se lies
below its positive root-mean-square
value
(a = 1)
84
%
of the
time, and therefore exceeds that
value o
nly
1
6%
of the ti
me.
d
0., /
G"
0.4 /
0'"
0.3/
cr
(
\
I
\
0,2/cr
0 .1/
cr
I
I
\
I
'\
/
'-----
-
4a--3a-
-20'"
2o-
3.-
Figure 3-1.
The
Gaussian
probability
density func-
tion
of
a,
the
root-mean-square
amplitude.
3-2 PROPERTIES
OF
RANDOM
NOISE
40"
3.3.3 Importance
of
Knowing the Distribution.
Knowledge
of
the amplitude
distribution
of
a noise
is
important
in measuring its magnitude. Electronic voltmeters
respond
to
different
measures
of
the amplitude
of
the voltage,
su
ch
as
the rms, the peak,
or
the
(full
-wave-rectified)
average.
The peak and
average
values
of
various waveforms having
1-
volt,
rms, amplitude
are
given in Table 3-2. A voltmeter
re-
sponding
to
the
average
and calibrated
to
indicate the
rms
val
ue
of
a sine w
ave
will, when
measu
ring Gaussian noise, indi-
cate a
va
lue that
is
low
by the factor 0.
798/0.900
= 0.887
(-1.0
5 dB)
1
•
Voltmeters that respond
to
the true rms value are
quite approp riate
fo
r the
mea
surement
of
noise,
because
they
c
an
indicate the rms
val
ue
wit
hout correction, regardless
of
the
amp
I itude distribut ion.
T
ABLE 3-
2
Rm
s, peak, and full-wave recti fied average voltage valu
es
of various waveforms.
FUL
L-WAVE RECTIFIED
RM
S
PEAK
A
VERAG
E
Sine
Wave
1.0
1.414
(./2)
0.900
(
27
)
Square
Wave
1.0 1.0
1.0
(A)
Gaussian
Noise
1.0
0.798
The response
of
a peak-indicating voltmeter
is
depende
nt
upon the charging and discharging time constants
of
its recti-
fier c
ircuit
s; when random noise
is
measured, e
ach
type
of
pea
k-responding voltmete r may indicate a
different
value. The
resp
onse
time of
a rectified-average-responding
volt
meter is, in
practice, often shorter than that
of
a true rms
voltmet
er, and
it
can
be
used
with
the correction fact or cited above. However,
for
measuremen
ts
without
the correction fac
tor,
or
for
meas-
1
This
and
much other information
concerning random noi
se
is
con·
tained
in a General
Rad
io
publication, "Usef
ul Formulas,
Tables
and
Curves
for
Random
Noise",
Instrument
Note
1 N-1 03
(Ju
ne, 1963).
A
copy
of
this
six-page
compedium
can
be
obtained
f r
ee
of
ch ar ge
by
w r
iting
to
General
Radio,
West
Concord,
Mass.,
0 1781.
LOO
0.
75
0.50
0.25
0
-4.-
v
I
v
v
I
/
-3
a
-2a
2o-
3.-
Figure 3-2. The Gaussian
probability
distribution
function
plotted
as a
func
tion
of
a,
the
root-mean
-
squar
e amplit
ude
.
40"
Page 12

•
..
urements on non-Gaussian nois
e,
it
is
necessary to
use
a true-
rms instrument.
3.3.4 Measuring
Amplitude
Distribution.
The
amplitude
distribution,
P(v),
can
be
measured by
means
of a circuit
that
measures
the percentage
of
time during
which the noise
voltage exceeds (or does
not
exceed) the volt-
age
level,
v.
Apparatus
for
this purpose generally includes
some
form
of
level-crossing detector and,
for
high-speed opera-
tion,
Schmitt-circuit
wave-sh
apers.
The measurement must
be
made by averaging over a time long enough
to
smooth the
fluctuations in the indication
to
negligible
size.
The amplitude density
distribution,
p(v),
can
be
meas-
ured
by
similar,
but
somewhat more complicated, apparatus
that indicates the percentage
of
time that the noise voltage
exists
within
the range
from
v to
(v
+ dv). In making any
of
these measurements, averaging
is
important,
bacause
only
the
av
erage
characteristics
of
the noise
can
be
measured meaning-
fully.
In the present state
of
the art, l
evel-crossing detector cir-
cuits
can
not
be
made
to
operate fast enough
for
measurements
on random noise containing such high frequencies
as
those pro-
duced by th e 1383. However, measurements
can
be
made
by
sampling the noise at a lower-frequency rate,
such
as
50 or
100 kHz.
If
the sampling efficiency
is
unity,
the sampled-and-
held
waveform
has
the
same
amplitude
distribution
as
the high-
frequency random noise,
but
it
contains much lower frequency
components, and
it
can
be
applied successfully
to
the l
eve
l-
crossing detector circuits mentioned above.
3.3.5
Amplitude
Distribution
of
the Type 1383.
The noise source
used
in the 1383
is
a thermionic diode.
The noise
is
generated
as
shot noise in the plate current
of
the
diode, the
amp
litude distribution
of
which
is
definitely
Gaussi-
an
because
the total current
is
the sum
of
a very large number
of
,independent pulses.2 The amplifiers in th e 1383
have
been
specia
lly
designed
so
that, at
full
output
amp I itude, pulses
be-
low 3a
will
not
be
clipped.
3.4 SPECTRUM.
3.4. 1 General.
The spectrum
of
a random signal
is
different
from
that
of
a periodic signal, which
is
composed
of
one or more discrete
lin
es,
each
of
which corresponds
to
a frequency component
of
the periodic signal. A
truly
random signal contains no peri-
odic
fr
equency components, and
has
a spectrum that
is
a con-
tinuous function
of
frequency.
3.4.2 Spectrum Functions.
The frequency content
of
a random noise
is
described by
a
function
called the spectral intensity, which
has
the dimen-
sions
of
voltage squared per
unit
bandwidth. (When divided
2Bennett
, W.
R.
,
"Electrical
Noise",
McGraw-Hill
Book
Co.,
New
York
(1960),
p.40.
by a value
of
resistance,
it
is
equal
to
the power that voltage
would
dissipate in that resistance, per
unit
bandwidth). The
spectral intensity
is
the Fourier transform
of
the autocorrela-
tion
function,
and
is
the spectrum function most often
used
in
mathematical
analysis
of
random noise.
It
is
not
the most co
n-
venient function
for
practical
use,
~owever,
because
spectra
are
usually measured
as
voltage, rather than voltag e
squared
, in a
given bandwidth, and
filter responses,
used
in shaping noise
spectra,
are
usually
measured
as
voltage functions. Therefor
e,
for
practical
use,
we
define the voltage spectrum
as
numerical-
ly equal
to the square
root
of
the
spec
tral intensity .
It
has
units
of
voltage per
squa
re
root
of
bandwi
dth,
but
may
be
spoken
of
as
voltage in a given bandw idth. Spect
ra
shown in
Figure 3-3
are
plotted
as volt
age
spectra.
3.4.3 White Noise.
Noise whose
spect
ral
intensity
is
constant
ov~r
a range of
frequencies
is
called white noise, by
ana
logy wi th
white
light,
which contains more or l
ess
equal
int
ens
iti
es
of
all visible
colors.
3
White noise cannot contain equal amplitudes at all
frequencies,
for
then the total power in t
he
noise would
be
in-
finite. White noise, therefore,
means
that
the spectrum
is
flat
over the range
of
interest,
for
example,
throughout
the audi
o-
frequency rang
e.
Because
of its
flat
spec
trum,
whit
e noise,is
part icularly
convenient
as a sta
rting point
for
many experi-
ments.
3.4.4
Importance
of
Knowing the Spectrum.
In most experiments involving random noise, kno wl
edge
of
the spectrum
of
the noise being
used
is vita lly
necessa
ry.
When
noise
is
used
as
a driving-po
int
signal to
determine the
response
of
some
sys
tem, the response is meaningful
only
when
the
input
spectrum
is
known, and
is
usual
ly most conveniently
studied when the
input
spectrum is flat. There are,
of
cou
rse,
cases
where other spectra are more convenient.
If,
in such
cases
, a
filter
can
be
constructed whose r
espo
nse has
the
shape
of
the desired spectrum,
white
noise
is
the proper
input for
that
filter
to
produce the desired spectrum at its
output
3.4.5 Noise-Spectra Measurements.
The spectrum
of
a noise
can
be
measured
with
any
wave
analyzer whose frequency
range
is
appropriat
e.
For the out-
put
indication to
be
free
of
fluctuations that
might cause
reading errors, the product
of
analysis
bandwidth and th e
av-
eraging time must
be
large. As in the
measureme
nt
of
the
amplitude
distribution,
the spectrum can only
be
measured
accurately
by
averaging
ove
r a relatively long
tim
e interval.
Wave
analyzers generally indicate the vol
tage
in the
ana
l-
ysis passband. The indi cation
is
therefore propo
rti
onal
to
w(f)
,
not
W(f).
It
is
convenient
to
reduce all measurements
to
a
3Aithough,
as
Bennett
(op.cit.,
p.
14)
points
out,
the
analogy
has
been
drawn
incorrectly,
because
spec
troscopists
were
measuring
Intensity
as
a
function
of wave
length, and
found
it
to
be
substantially
con
sta
nt
per
unit
wavelength,
not
per
unit
frequency.
PROPERTIES OF RANDOM NOISE 3-3
Page 13

<J>
_J
"'
"'
0
"'
0
0
I
~
-2
_J
"'
~
-3
_J
"'
<!>
..
~
-7
0
>
-8
-9
"'
cr:::
-10
,......,./
v
0 . 1 MHz
J.O
MHz
FREQUENCY
IO
MHz
Figure 3-3.
Typical
voltage spectrum
of
the
1383
Random-Noise Generator.
common bandwidth
basi
s,
and the most-often-used bandwidth
is
one cyc le. Units
for
W(f) are "volts
squared
per cycle band-
w
idt
h,"
and considerable u
se
has
been
made
of
the
unit
"volts
per root-cycle"
for
w(f).
Now
that
"cycles"
have
become
"hertz
," this term
is
even
more cumbersome, and
is
perhaps
best
replaced by
"volts
in a 1-hertz band."
In
order
to
convert
to
volts in a
1-hert
z band,
it
is
neces-
sary
to
divide th e voltage indication
of
the analyzer by the
square
root
of
the
ana
lysis bandwid th. For exampl
e,
using the
General Radio Ty
pe
1900
Wave
Analyzer, mu
ltiply
by the
fa
ctors given in Table 3-3
to
convert measured values
of
ran-
dom noise to volts in a
1-hert
z band.
TABLE
3-3
Correction factors
for
converting voltage indication
of
the Type 1900
Wave
Analyzer
to
voltage in a 1-hertz band.
ANALYZER
BANDWIDTH
3
Hz
10Hz
50 Hz
CORRECTION FACTOR
4
0.650
(-3.
7
dB)
0.357 (-9.0
dB)
0.159{-15.9dB)
4These
numbers include
the
correction
for
the
average-responding
voltmeter
in
the
1900
Wave
Analyzer.
In a constant-p ercentage-bandwidth analyzer, the
analy-
sis
bandwidth
is
directly
proportional
to
the center frequency
of
the
pass
band.
Thi
s necessitates dividing the voltage indica-
tion
by the square ro
ot of
the frequency
as
well
as
by the cor-
rection
factor
for
the fractional bandwidth itself. When using
constant-p ercentage-bandwidth analyzers,
su
ch
as
th e General
Radio Type 1564
Sound and Vibration Analyzer or t
he
Type
1558 Octave-Band Analyzer,
multiply
th e analyzer voltage in-
dication by the appropriate conversion fac
tor
in Table 3-4.
3-4
PROPERTIES OF
RANDOM
NOISE
TABLE
3-4
Correction factors
for
converting voltage indication
of
a
constant-percentage-bandwidth analyzer
to
voltage in a 1-hertz band.
BANDWIDTH
1/10 Octave
1/3 Octave
Octave
CORRECTION
FACTOR
3.80/
JT
2.
08/JT
1.19/JT
3.4.6 Spectrum
of
the Type 1383.
The no
is
e produced by the Type 1383
is white ove
r a wide
range of
frequencies; the voltage spectrum is
flat
within
±1
dB
for
frequencies
from
20Hz
to
10
MHz, and within ±1.5 dB
for
frequ encies
from
10
to
20 MHz. A typical spectrum is shown
in Figure 3-3. T
he spec
trum
is
cut
off
very
sha
rply at 20 MH
z,
so
th at the e
ffectiv
e bandwidth
of
the noise
is
quite
closely 20
MHz.
At
the o
pen-circuit
output
amp
litude of 1 V,
the voltage
spectrum
level
is
224
J..l.V
in a 1-Hz bandwidth.
3.5
STATIONARITY
.
A random noise
is
said
to
be
stationa ry5 if
its various
statist i
cal para
mete
rs,
such
as
the amp I itude
distribution
and
the spectral
int
ensity, do
not
change with time. Random noise,
of
course, never repeats the
same
pattern
from
one moment
to
the next, but,
if it
is
stationary, many measurements
of
the
spec
trum made at
different
times
will
all indi cate the
same
re-
sult, except
for
the unavoidable errors
of
measuring a random
quantity
in a
finite
time. In discussing tests
for
stationarity,
Bendat and Piersol
6
po
int
out
th at,
for
most nois
e-ge
nerating
5sennett,
op.
cit.,
p.
52-54
.
6sendat, J.S.,
and
Piersol,
A.
G.,
Measurement
and
Analysis
of
Random
Data,
John
Wil
ey
and
Sons,
Inc
.,
New
York,
1966, pp.
219-223.
Page 14

processes,
it
is suffi
cient
to
determine
that
the
mean
and the
varian
ce
(square
of
the standard deviation,
a)
do
not
change
with th e time at
whi
ch
they are measured.
Because
the
output
of
the 1383 is
ac
coupl
ed,
the
mean
is
automatically zer
o,
and
it
is
only n
ece
ssary
to observe the r
ms
amp! itude
to
prove
stationa
rit
y. This
can
be
done by
seeing
that
the fluctuations
in long-time recordin
gs
of th e amplitude
of
the noise are no
greater than the value predict
ed
from the
bandwidth
of
the
noise and the smoothing time
of
the detector.
The importance of stati ona
rity
in a random-noise genera-
tor
is analogous
to stabilit
y in
an
osc
illat
or; the
user
is
assured
th at there is no chan
ge
in th e spectru m
or
the amplitude distri-
buti on during the cour
se
of
an
experiment. The stationarity
of the
noise
output
of
the 1383 comes, first
of
all,
from
its
noise
source;
the temperature-limited thermionic diode
has
long been r
ecog
nized and
used
as
a standard noise
source
for
nois
e-
figure
measurements of high-frequency amp!
ifi
ers. 7 The
noise current
it
produ
ces
is proportional to the square root of
7spa
ngenberg,
K.
R.,
Vacuum
Tubes, M
cGraw-Hill
Book
Co., Inc.
New York ,
1948,
p,
307,
the
de
plate current , which, in the 1383, is held constant by
feedback cont ro
ll
ing the filament current. The gain
of
the
noi
se-cu
rrent amp!
ifi
ers
is
stabili
zed
by feedback.
3.6 SUMMARY.
Because vari
ous
ter
ms
used
in speaking
of
random noise
are
some
times confused, a summary is presented here of the
most-often-used
word
s,
together
with
a brief exp lanation of
their
meaning: "Noise"
is
any unwanted signal.
"Random
noise"
is
a si
gna
l whose future value cannot
be exac
tly
predict-
ed
and
that
does
not
contain any periodic componen
ts.
To
diffe
rent iate
clea
rly
between the spectrum and the amp! itude
distribution, in this book the word
"densi
ty"
is
used only
in
co
nnec
tion
with
the amp
litud
e distribution. The word
"inten-
s
ity''
is
used
only
in connecti on
with
the spectru m. "Gaussian"
appli
es only to t
he
amplitude dis
tribution
and refe
rs
to a pa
r-
ticular theoretical distribution.
"Whit
e" refers o
nly
to
the
spect
ru
m,
and means
that the
spec
tral
int
ensity is constant
over some
ran
ge
of
interest.
PROPERTIES OF RANDOM NOISE 3-5
Page 15

Principles
of
Operation-Section
4
4.1
DESCRIPTIONOFC
IRCUIT ...
...
.
......
.
.....
.
..
4·1
@OUTPUT
1383·9
Fi!PJre
4-1. Block diagram
of
the
1383
Random-Noise Generator.
4.1
DESCRIPTION OF
CIRCUIT
.
Figure 4·1
is
a block diagr
am
of
the Type 1383
Random- Noi
se Generator. The noise source is a the rmon ic
diode operated in
th
e temperatur
e-l
imited mode. T
he
noi
se
o
utp
ut of
suc
h a diode operated in this way
is
exactly
Gauss
ian,
it
is spectr
ally flat
to
ext
remely high frequenci
es,
and it
s l
eve
l is pro portional to the square
root
of
the de plate
curren
t. To keep the amplitude stable, the filament current
of
the noi
se
di ode
is contr
oll
ed
by feedback,
to
maintain a
co
nsta
nt curr
ent. The noi
se
ou t
put
of
the diode
is
amplified
in
4-1 PRINCIPLES OF OPERATION
the frequency range from 40 to 80 MHz. By heterodyning
aga
inst a 60-MHz l
ocal osc
illator, the noise frequency is
tr
ans
lated
to
the 0-to-20-M Hz band. A sharp-cuto
ff
low-
pass
fil
ter
ensures
that higher noi
se frequenci
es
and residual
l
oca
l-osci llator signals are removed. An ac-coup led amplifier is
used
to
increase the power
of
tha t noi
se
to the o
utput
level of
1 V. The voltmeter (whi
ch
indicat
es
the o
utput
leve
l)
and the
output
attenuator complete the circuit
. A ll power s
uppli
es
are
regulated except the
plate supply to the no
ise
di od
e.
Page 16

•
..
Operat
ing
Proc
edure-
Section
5
5.1 GENERA
L.
5.1
GENERAL
...........
. .
5.2
OUTPUT
LEVEL
CONTROL . . .
5.3 MET
ER' FULL
SCALE CONTROL
5.4 OUTPUT CONNECTIONS
..
5.5
OUTPUTIMPEDANCE
5.6
MODIFYING
THE OUTPUT
With the instrument in position on the bench or installed
in a relay rack,
set
the screwdriver-operated slide switch S502
(4, Figure 1-2)
to
the
range corresponding
to
the power-line
voltage. Connect
the instrument
to
the line power, using the
power
ca
ble supplied (P/N 4200-9622),
and
turn on the
POWER
switch.
Follow
the instructions given
in
paragraphs 5.2
and
5.3
for
sett i
ng the OUTPUT
LEVEL
and
METER
FULL
SCALE
controls.
5.2 OUTPUT
LEVEL
CONTROL.
The OUTPUT
LEVEL
control
is
a continuous rotary
control by
means
of
whi
ch
the
output
level
can
be
set
at any
selected value between its maximum open-circuit value
and
ze
ro. The open-circuit
output
voltage
is
indicated by the meter
on the
front
panel, wh ich must
be
read
on the
scale
appropri-
ate
to
the setting
of
the
output
attenuator (the METER
FULL
SCALE control).
5.3 METER
FULL
SCALE CONT ROL.
The METER
FULL
SCALE control
is
the
output
attenu-
ator and permits reduction
of
the output-voltage
level
by 80
dB
from its maximum, in 10-dB
steps.
Th e voltage indicated
is
the open-cir
cuit
output
voltage; when the
output
is
loaded by
50
n,
the
output
voltage is reduced by half. Decibel readings
on
the dial
of
the METER
FULL
SCALE control
can
be
added
to
the decibel indication
of
the meter
to
obtain the open-cir-
cuit
output
vol
tage
in decibels below 1 V.
5.4
OUTPUT CONNECTIONS.
T
he
output
connector on the
front
panel
is
a GR874,
locking-type, coaxial connector. Generally, the
output
shou
ld
be
taken by
means
of
a mating G R874 connector
into
a closed
.
5-1
.
5-1
.
5-1
.
5-1
.
5-1
. 5-1
coaxial system. Adapto
rs
to other types
of
high-frequency
connectors are
available (refer
to
Table 1-4). The
output
con-
nector
can
be
moved
to
the rear panel
if
more convenient,
as
when the instrum ent
is
mounted
in
a relay rack (refer
to
para-
gr
aph
2.4 and Figure 8-2).
5.5
OUTPUT IMPEDANCE.
The
output
impedance
of
the 1383
is
50 ohms, ±2%.
Th e
output
can
be
sho
rt circuited
without
causing
distortion
of
the
output
current. The maximum
output
current
into
a
short circu
it
is
20 mA, rms,
with
occasional peaks that may
exceed
four
tim
es
that value.
5.
6 M
ODIFYING
THE OUTPUT.
5.6.1
Producing Lower Levels.
GR874-G fixed coax
ial
attenuato
rs
(refer
to
Table 1-4)
in reducing the
output level
beyond the
range of
the 1383
out
-
put attenuator (th e METER
FULL
SCALE control).
These
units are
avai
lable
with
attenuations
of
3,
6, 10, 14,
and
20 dB.
They
are
designed
for inse
rti
on in a 50-ohm line.
5.6.2 Generating Band
s of Noi
se.
It
may
be
necessary
to rest
rict
the bandwidth
of
the
noise output
of
the 138
3.
For inserting a tuned cir
cuit
or
filter
in series
with
the 50-ohm
output,
it
may
be
convenient
to
use
the GR874-X insertion
unit,
which permits totally-shielded
connection
of
any circu
it
that
will
fit
in its 2-inch long, 9/16-
inch-diameter
space.
5.
6.3
Generatin
g H
igher
Levels.
The noise generated by the 1383 Random-Noise Genera-
tor
can
be
amplified by any amplifie r whose frequency
range
is
adequate. The high crest factor
of
Gaussian
noise must
be
kept
OPERATING PROCEDURE 5-1
Page 17

in mind
in
choosing the power rati
ng
of
the amplifier
so
that
the noise
will
not
be
clipped. In order
that
peaks
of
3a
be
passed
without
clipping, the amplifier must
be
capable
of am-
plifying
a sine wave
without
distorti
on
to
a power l
eve
l 4.5
times greater than the
average
noise power desired.
5.6.4
Generating Noise at Higher Frequencies.
Noise at higher frequen c
ies
can
be
gen
erated by using a
double-balanced mixer
to
modulate a high-frequency carri er
from
an
oscillator or signal generator. Th e result
will
be a band
5-2
OPERATING
PROCEDURE
of
noi
se
40 MHz wide, centered on th e carrier frequency.
(There
will
be
a notch
40
Hz wide at th e carrier frequency.
1
)
The
degree
of
discrimination
aga
inst th e carrier and the upper
ca
rrier frequency
that can
be used
will
depend upon th e char-
ac
teristi
cs
of
the mixer use
d.
Many
such
mixer
units
are com-
mercially available.
2
1
Perhaps
wider,
depending
upon
the
characteristics
of
the
mixer
.
2Relcom,
E. G. ,
Mountain
View,
Cal.
Page 18

'
•
Applications-
Section
6
6.1
GENERAL
......
.
..............
. .
6·1
.
6-1
.
6-1
.
6-1
. 6-1
. 6-2
. 6-3
6.2
SIMULATION
OF BACKGROUND NOISE
....
.
6.3
MEASURit\G
INTERMODULATION
DISTORTION.
6.4 MEASURING CROSSTALK
...........
.
6.5
MEASUREMENT
OF
EFFECTIVE
BANDWIDTH.
6.6 NOISE TEMPERATURE
....
..
. .
6.7
NOISE FACTOR
OR
NOISE FIGURE
......
.
6.1 GENERAL.
The Type 1383 Random-Noise Generator
is useful where-
ever
a broad-band, high-level source
of
white
noise
is
needed.
Its 50-ohm
output
impedance and spectral intensity that
is
substantially constant
to
20 MHz make
it
particularly useful at
radio frequencies.
For audio-frequency
applications, Types
1381
and
1382
Random-Noise
Gene
rators1 may
be
found
to
be
more useful.
They
are
intended
for
applications
in
the fields
of aco
ustics,
electroacoustics, psychoacoustics,
and
vibration analysis, in ad-
dition
to
their general
use
as
audio-frequency generators
of
random electrical noise.
6.2
SIMULATION
OF BACKGROUND NOISE.
In studying the performance
of
radio, telemetry, radar or
sonar systems
with
regard
to
their
ability
to
transmit, detect,
and
recover signals in noise,
it
is
convenient
to
simulate the
r
eal
mixtu
re
of
signal and naturally occurring noise by adding
noise
of
controlled
cha
racteristi
cs
to
a standard signal. Noise
sometimes becomes the
signal itself in tests
of
correlation
re-
ceivers
and
other modern signal-processing systems.
A
mixture
of
signal
and
noise
can
be created by adding
the
output
of
a signal generator (possibly modulat ed in
some
appropriate m?nner)
to
the noise from the 1383. This c
an
be
accomplished
with
the GR874-TPD or GR874-TPDL Power
Divider
(see
Table 1-4),
with
which signals in two 50-ohm
systems
can
be
added together. Noise that
has
been
hetero-
dyned
to
higher frequencies
(see
paragraph 5.6.4) c
an
be
used
for
this purpose.
6.3 MEASURING
INTERMODULATION
DISTORTION.
Random noise
is
used
in
one very effective method
of
measuring intermodulation distortion. 2 White noise, which
1
Faran, J.J.,
Jr., "Random-Noise
Generators", General
Radio
Experimenter
Vol. 42, No.1
,
pp.
3-13
(January, 1968).
2MIL
STD-1886.
has
been
passed
through a band-stop
filter
that reduces the
level
of
the noise by,
say,
80 dB over a narrow
range
of
fre-
quencies,
is
applied
to
the
input
of
a system. Spectrum
meas-
urements
of
the system
output
indicate how much the
"notch"
in the noise spectrum
has
been
filled in by intermodulation
products. This
is
an
especia
lly
significant
measu
rem-ent
be-
cause
white noise contains all the frequencies
to
whi
ch
the
system responds,
and
represents,
in
this
sense,
a "worst-case"
type
of
test signal.
6.4 MEASURING CROSSTALK.
White noise
is
a very appropriate signal
for
use
in
meas-
uring crosstalk in multichannel telephone, radio, or telemetry
systems. Spectrum analysis
of
the crosstalk signal identifies
the frequencies that
cause
the greatest disturbance, thereby
providing some
assistance
in determining the
cause
and specify -
ing a cure.
6.5 MEASUREMENT OF EFFECTIVE BANDWIDTH.
When
wave
analyzers or filters (or more complex
sys-
tems)
are
used
to
measu
re the spectral density
of
noise,
it
is
necessary
to
know the effecti
ve
bandwidth
of
the
filter
or
of
the system. The effective noise bandwidth can·
be
thought
of
in terms
of
an
ideal
filter
having a rectangular frequency char-
acteristic (constant over a
range
of freq
uencies, and zero every-
where else). The effective noise bandwidth
of a filter
is
the
width
of
the
pass
band
of
the ideal
filter
whose ou
tput
is
ex-
actly equal
to
the
output
of
the actual
filter when
the inputs
are
the
same
white noise, provided the maximum transmissions
of
the
two
filters
are
the
same.
It
can
be
measured
by finding
the
total signal transmitted when white noise
of
known
spec-
tral
level
is
applied
to
the input. The frequency
range
of
the
white noise must
include all frequencies
for
which the
filter
being
measured
has
appreciable transmission.
When
the effective bandwidth
of
the
input
noise
is
known, the
necessary
computations
are
simplified. Then the
APPLICATIONS
6-1
Page 19

effective bandwidth
of
the
filter
is
whe
re
EBWn
is
the effective bandwidth
of
the noise;
Nout
is
the
output
noise voltage;
Nin
is
the
input
noi
se
voltage;
Gfmax
is
the maximum or
peak
gain
of
the
filter
(as
measured with a sine-wave signal).
The effec tive bandwidth
of
the noise
output
of
the 1383
is
very close
to
20
MHz. In measuring the
output
voltage,
it
should
be
kept in mind that the voltmeter
used
should respond
accurately
to
frequencies
as
high
as
20 MHz
and
its operation
(average,
peak, or r
ms)
should
be
known (refer
to
paragraph
3.3.3). The
voltmeter should
not
be
connected at the
end
of
an
unterminated cable,
but
should either terminate the cable
(if
a 50-ohm
input
adaptor
is
available) or should
be
bridged
onto
a terminat
ed
cable.
6.6 NOISE
TEMPERATURE
.
6.6.1
Definition.
It
is
sometim
es
convenient
to
express the noise
level
in a
circuit
in ter
ms
of
noise temperature. The noise voltage
across
a r
esi
stance due
to
thermal agitation
of
the free electrons in
it
(thermal noise)
is
where
en
is
the rms noise voltage,
k
isBoltzmann'sconstant(1.38X
10-
23
joules/°K),
Tis
the absolute temperature
of
the resistance in o K,
R
is
the resistance in ohms,
and
B
is
the bandwidth in hertz in which the noise
is
be-
i
ng
observed.
When
an
artificially-generated noise voltage,
ea,
is
im-
pr
essed
across a resistance,
it
adds
to
the thermal noise
whose
amplitude
is
given above.
It
is
then possible to
define noise temperature
as
that temperature at whi
ch
the thermal noise power would equal the total noise
power
3
:
(6-1)
Because
noise temperature depends upon the square
of
the
noise
voltage,
such
values
can
become extraordinarily
large;
for
example, the noise temperature
of
the
output
of
the 1383 at
full
output
is
1.8 X 10
13
o
K.
Noise tem-
perature
is
most useful in describing the equivalent input
3More
complicated (and
more
precise)
definitions
are
given
in
"IRE Standards
on
Electron
Tubes: Definitions
of
Terms,
1962
(62
IRE
7.S2)",
Proc. I
EEE
51,
pp. 434-435
(March, 1 963)
.
6-2 APPLICATIONS
noise
of
high-frequency receivers and amplifiers, where,
incidentally,
for
certain types
of
circuits, the equivalent
input
noise temperature
(see
below)
is
considerably lower
than the ambient temperature.
The noise temperature
of
the
output
of
the 1383
can
never
be
less
than its actual temperature,
because
its
output
circuits
are
comprised
of
real
resistances.
Fi[r
ure
6-1
shows how the noise temperature
of
the
output
varies
with
the amount
of
attenuation when the OUTPUT
LEVEL
control
is
set
so
that the meter indicates
full
scale.
Attenuation up
to
80 dB
is
available
with
the
METER
FULL
SCALE control; additional attenuation
must
be
obtained
with
external attenuators such
as
G R
874-G units (refer
to
paragraph 5.6.1
).
As
is
readily
apparent, the noise temperature levels
off
at 290° K
(23°C)
as
the attenuation
is
increased (assuming the noise
generator and attenuators
are
at 23°C).
6.6.2 Measurement
of
Effective
Input
Noise Temperature.
The effective
input
noise temperature
of a re-
ceiver or amplifier
is
the temperature at which the
re-
sistive component
of
the
input
source
would
gene
rate
an
amount
of
noise exact
ly
equal
to
that arising in the
receiver or
amplifier only.
One
procedure
for
measuring
the effective
input
noise temperature involves knowledge
of
the effective noise temperature
of a source
under both
hot (on) and
cold (off) conditions.
4
For amplifiers
intended
for
operation
from
a 50-ohm source, the effec-
tive noise temperature
of
the
output
of
the 1383 wh
en
on
can
be
read
from Figure
6-1
or calculated
from
equation
6-
1,
paragraph 6.6.1. The effective noise temperature when
the noise generator
is
off
is
the temperature
of
the noise
generator (and its
output
attenuators). Normal room
temperature
(290°
K)
is
often a close-enough approxima-
tion.
The measurement
is
made
by connecting a noise
generator
to
the receiver and measuring the
output
power
when the noise
gene
rator
is
cold
off
and
hot
on. The
effective
input
noise temperature
is
then
where Tih
is
the noise temperature
of
the source when
it
is
hot
(on),
and
Ti c
is the noise temperature
of
the source when
it
is
cold (
off
),
Poh
is
the
output
power when the source
is
hot
(on),
Poe is the
output
power when the source
is cold
(off).
4for
an
excellent
discussion
of
noise
temperature
and
noise-
figure
measurements,
refer
to
Mumford,
W.W.,
and Scheibe
,
E.H.,
Noise
Perfonnance
Factors in
Communication
Systems,
Horizon
House-
Microwave, Inc., Dedham,
M ass. ( 1
968).
Page 20

10,000
~0
00
z
~
300
0
""
(/)
w
w
a:
200
(.!)
w
0
~
w
a:
::>
....
0
~
1000
w
"-
::E
w
....
w
(/)
0
z
~0
0
-
-
t--
-
--
_L
/_
I
-
I
I
~
1/
I
I
--
I
I
I
I
1/
J
v
300
290"K-
20
0
-1
40
-1
30
-120
-110
__]_
-1
00
-9
0
OUTPUT
LEVEL
IN
dB
RE
t VOLT nn-1
Figure 6-1. Noise
temperature
at
the
output
con-
nector
of
the
1383
as a
function
of
the
level in dB
re 1
V, rms.
Output
impedance
50
D.
temper·
ature 23°C
(290
°K).
Additional
attenuation
beyond
80
dB
provided
externally.
6.7 NOISE FACTOR OR NOISE FIGURE.
6.7.1 Definitions.
The noise factor,
F,
of
a receiver or amplifier
is
the
ratio
of
the
tot
al
output
noise power
to
that portion
of
the
output
power that is due
to
thermal noise
in
the
source.
5
It
is thus the amount by which the
output
noise
is
incr
eased
because
of
noise in the amplifier over
what
it
would
be
if
the thermal noise in th e source
was
amplified by a perfect (noise-free) amplifier. In
gen
-
era
lly
accepted
useage, "noise
figure"
is
the noise factor
exp
res
sed
in decibels,6 i.e., "noise figure"
is
10 log
F.
6.7.2 Measurement
of
Noise Factor or Noise Figure.
The
simplest and most c9nvenient method
of
meas-
uring the noise factor
of
a receiver or amplifier
is
usually
by use
of
a noise generator. The
measu
rement
is
similar
to
that
used
in the determination
of
effective
input
noise temperature. The noi
se
factor
is
(
Tih )
(Ti
c )
F
=
2§0-
1 -
(P
0 h/P0
c)
29Q-
1
(Poh/Pod-
1
where Tih
is
the noise temperature
of the
source when
it
is
hot
(on),
and
Tic
is
the noise temperature
of
the sour
ce
when
it
is
cold(off),
Poh
is the
power
output
when th e source
is
hot
(o
n),
Poe
is
the power
output
when the
source
is
cold
(
off
).
When
Tic
is
290°K, the formula simplifies to
F
Tih
29o-
1
Poh
--1
Poe
For more detailed discussion
of
noise factor and
noise fi
gu
re
and
the measurement thereof , the reader
is
referred
to
the
lit
eratur
e,
footnotes 4 and 5,
thi
s section.
5More
complicated
(and
more
prec
.ise)
definitions
are
given
in
Haus, H.A., et
al, "Description
of
the
Noise
Performance
of
Amplifiers
and
Receiving
Systems",
Proc.
IEEE
51,
PP.
436-442
(March,
1963),
Appendix.
6Mumford and
Schiebe,
op,cit.,
p. 69.
APPLICATIONS
6-3
Page 21

Service
and
Maintenance-Section
7
7.1
SERVICE .
..........
.
......
. .
7-1
.
7-1
. 7-5
. 7-6
.
7-7
.
7-7
.
7-7
7.2
MINIMUM
PERFORMAN
CE
STANDARDS.
7.3 RECALIBRATION .
..
7.4 TROUBLE ANALYSIS .
7.5 KNOB
REMOVAL ...
7.6
KNOB
INSTALLATION
7.7 PILOT-LAMP
REMOVAL
7.1 SERVICE.
Our
two-year warranty attests the
quality
of
ma-
terials and workmanship in our products. When
dif-
iculties do occur, our service engineers
will
assist
in any
way possible.
If
the
difficulty
cannot
be
eliminated by
use
of
the
following
service instructions,
please
write
or
phone
ou
r Service Department
(see
rear cover), giving
full
information
of
the
trouble
and
of
steps taken
to
remedy
it.
Be
sure
to
mention the type serial and I D numbers
of
instrument.
Before returning
an
instrument
to
General Radio
for
service,
please
write
to
our Service Department or nearest
District
Office, requesting a Returned Material Tag.
Use
of
this tag
will
ensure proper handling and identification.
For instruments
not
covered by the warranty, a purchase
order should
be
forwarded
to
avoid unnecessary delay.
7.2
MINIMUM
PERFORMANCE STANDARDS.
7.2.1
General.
The
two
most
important
items
to
be
measured in
checking a noise generator
for
conformance
to
specifica-
tions
are
the spectrum and the amp I itude
distribution.
Both
of
these
are
com pi icated and tedious measurements,
requiring a number
of
pieces
of
equipment. Instruments
have
been
constructed especially
for
this purpose at
General Radio and
are
used
in checking noise generators
before they
are
shipped. The performance
of
this special ly
constructed equipment
is
not
readily duplicated by com-
mercially available instruments. However, given below
are
lists
of
equipment and instructions
for
checking these
characteristics
as
well
as
possible,
with rea
dily
available
apparatus.
7.2.2 Checking the Spectrum.
General.
The spectrum
of
the noise
output
of
the 1383
covers
an
extremely wide frequency
range
(20 Hz
to
20 MHz). No single
wave
analyzer covers this range.
Measurements, therefore, must
be
made
with
severa
l
analyze
rs
that may operate in
different
ways, particularly
with
regard
to
bandwidth and detector characteristics.
Because
of
the
difficulties
of
calibrating some
of
them,
it
is
recommended that the analyzers
be
used
to
check the
flatness
of
the spectrum, rather than
to
make abso
lute de-
terminations
of
the voltage spectrum level at
each
fre-
quency.
Spectrum.
A I ist
of
equipmen t
that
can
be
used
to
check the
flatn
ess
of
the spectrum
of
the 1383
is
given in Table 7-1.
Connect the
output
of
the 1383
to
the
input
of
either the
Rhode
& Schwarz Type USVH Selective Microvoltmeter
(Figure 7-1)
or
the Hew
lett
Packard Model
312A
Wave
GR
874
-R22A
PATCH
CORO
R&S
USVH
SELECTIVE
MI
CROVOLT
METER
R8S
FLA209'90
ADAPTOR
1383
-.t
Figure 7-1. The R & S
USVH
Microvoltmeter can
be
used
to
check the flatness
of
the spectrum
from
25
kHz
to
20
MHz.
SERVICE
AND
MAINTENANCE
7-1
Page 22

GR
874·R22A
PATCH CORD
GR
874 -OBPA
HP
312A
WA
VE
ANALYZER
ADAPT
OR
13B3.~
Figure 7-2. The spectrum flatness
can
be
checked
from
25
kHz
to
18 M
Hz
with the HP model
312A
Wave Analyze
r.
Analyzer (Figure 7-2), and
set
the
input
impedance at
50 S1. With th e full 1-V, r
ms,
out
put
of
the 1383, the volt-
age delivered
to the 50
S1
load
of the
analyzer will
be
0.5 V.
Set
th e attenuators
of
the wave analyzer accordingly, and
tune across the range
fr
om
25
kHz to
20
MHz (necessarily
stopp ing at 18 MHz in
the case
of
the
HP-
312A). Record
the meter indi
ca
ti o
ns
as a function
of
frequency. This is
the voltage
spec
tru
m l
eve
l on
an
arb
itr
ary
sca
le.
To
measu
re the spectrum at frequenci
es
below
20 kHz,
use
th e G R
Type
1564 Sound and
Vibration
Ana-
lyzer connected
as
shown in Figure 7-3. Th e bandwidth
of
the noise should be reduced before
it
is
connected
to
the
1564. The simp
le
filter
shown in Figure 7-4
can
be
con-
struct
ed
in a GR 874-X Inserti on
Unit
for
this purpose.
This fi
It
er is designed for operati on
from
a 50-ohm source
into
an
open circuit (impedan
ce
high compared
to
50
ohms).
Place
this
filter
at the out
put
of
th e 1383 and co
n-
nect
it
to
the input
of
the 1564 by a shielded
cable.
(Use
an
874-02
Adapto
r and a 1560-P95
Adaptor
Cable.
See
Table 1-4.) A
measu
rement made at
25
kHz (in the 1/3-
octave band) corresponds
to
the level measured
with
th e
high-frequency wave analyzer, and provides the transfer
to
a new a
rbitr
ary
sca
le for
thi
s analyze
r.
The 1564
is
a con-
stant-percentage-bandwidth analyze
r.
Subsequent voltage
GR
1560-
P95
ADAPTOR
C
ABL
E
GR
1~64
SOUND
AND
VIBRATION
ANALY
ZER
Figure 7-3. Connect ions
for
checking the spectrum
at frequencies
below 20 kHz.
IN
OUT
c
I
00
47p.F 0
Figure 7-4. Low-pass f ilter
to
be
built
into a
GR874-X
Insertion
Unit
and
used with a 5G-
n
Termination
Unit.
7-2
SERVICE
AND
MAINTENANC
E
measurements made at lower frequencies must be
mu
lti
-
plied by the
factor
v'25000/f
to
find
the voltage
that
would
be
measured
by
an· analyzer having constant
bandwidth.
The amount
by
which the resultant number
diff
ers from
that measured at 25 kHz
is
the departure
from
perfect
spectral flatness.
7.2.3 Amplitude Distribution.
As mentioned above, specially constructed equ ipment
is
used
at General Radio
for
checking the
amplitude
distribution
of
noise
gene
rato rs before they l
eave
the
fa
cto
ry. Customers fami I iar
with
amp I
itude distribution
measurements may
have
suitable equipment on hand, or at
least
wil
l understand what sort
of
equipment is necessary,
and
how
to
assemble it. Others must make
use
of
commercially available amplitude
distribution
analyzer
s,
two
of
which
will
be
discussed here.
A list
of
equipment tha t
can
be
used
in checking the
amplitude densi
ty
distribution
is
included in Table 7-1.
Sampling Unit
Necessary.
Regardless
of
what equ ipment is
used for the
measurement, there
is
one important consideration in
connection
with
the 1383: The bandwidth
of
the noise
produced by
it
is much
too
wide
for
any conventio nal
amplitude distri
bution
measu
ring equipment. This probl em
can
be
overcome by using sampling t
ech
niques
to
reduce
the
bandwidth
of
the noise signal wh ile preserving the
amplitude
distribution
characteristi
cs.
This
is
most
eas
ily
done
with
a sampling osci lloscope, which makes
availab
le
as
an
output
the "sampled-and-held" waveform. One such
is
the Tektronix 1S1
Sampli
ng
Plug-in
Unit.
It
should
be
triggered
from
an
external source
of
puls
es
at, say, a 20-kHz
rate; the resulting rectangular
samp
led-and-held wave
form
is
eas
ily
processed by amplitude
distribution
ana
lyzers
int
ended
for
audio-frequency
use.
An impo
rtant
precaution in the
use
of
such a
samplin g system
is
that the " sampl i
ng efficiency'fnust
be
adjusted
to
unity.
Otherwise the hold capacitor will
not
be
charged
fully
to
the val
ue
of the noi
se
waveform at the
sampling
in
sta
nt,
and the resulting
output
at
each step will
be
some sort
of
average
over the previous few sampl
es;
the
amplitude
distribution
of
the samp led-and-held ou
tput
will
not
be
representative
of
the noi
se.
The manufacturer's
procedure should be followed in setting
th
e samp ling
efficiency
to
unity.
When usi
ng
the
Tektronix
1 S1, connec t the
output
of
the 138 3 by a 50-Q cable
to
the 50-Q
input
of the
sam
piing
unit
. To avoid overloadi
ng
the sampl ing
unit,
adequate
attenuation should
be inserted
ahead
of
the sampler. This
can
be
done convenientl y
with
th e o
utput
attenuator
of
the
1383.
It may be necessary
to
use a buff
er ampl
ifie
r at the
output
of
the sampling
unit,
ahead
of
the
amplitude
distribution
analyzer,
eit
her to increase the signal
amplitude
Page 23

TABLE 7-1
Eq
uipment
required
for
checking
minimum
performance standards.
I
NSTRUMENT
REQUIREMENTS
RECOMMENDED
TYPE
(o
r equivalent)
Analyzer
Analy
ze
r
Low-pass
Filt
er
25kHz-
20 MHz
20H
z-2
5kH
z
(See
Figure 7-
4)
>100
MHz
input
Rhode & Schwarz
Typ
e
USVH
Selective
Microvo
ltmet
er or
Hewlett-Packard
Model
312A
Wave
Analyzer
(usable
to
18 MHz)
G R Type 1564 Sound
and
Vibrat
ion Analyzer
Build
in
GR874-X
Insertion
Unit
Sampling
Oscilloscope
bandw
idth, 50S1
input
impedance, samp l
ed-a
nd-he
ld
ou
tput
avai
lable
Tek
tronix
Model 1
S1
Samplin g
Unit
in any
Te
ktronix
Typ
e 530,
540,
or 550
Osc
illoscope
Pul
se
Gener
ator
10-ps pul
ses
at
20-kHz rate
GR
Type 1340
Buff
er
Amplifier
Input
imp
edance
> 100
kS1 bandwidth
>200kHz,
voltage
gain
of
10,
distortion
< 1
%.
Hewle
tt
-Packard
Mode
i465
-A
Amplitu
de
Distributi
on
Analyzer
B & K Model 161 or
Ouan-Tech Mod el 3
17
Counter
Counts
at 10-MHz rate,
multipl
e-pe
riod operati
on
GR
Type 11
91
or to lower th e impedance
of
the sampled-and-he
ld
signal.
If
a
buff
er ampl ifi er is used, it is extremely
important
that
it hav
e low distorti on,
as
even
sma
ll amounts
of
non-
lin
ea
r disto
rti
on
can
have a se
rious
effect
on the amplitude
distribu t ion
of
a random noise si
gna
l.
Use
of
the
B & K Model
161
Amplitude Distribution
Analyzer.
The B
& K Model
161
Amp
lit
ude Distribu
tion
Analyzer will
measu
re th e amp
litud
e d
ensity
distri
bution
of
rand
om n
oise. Wh
en making such measurements on the
output
of the 1383,
samp
ling techniqu
es
will
be necessa
ry.
(S
ee
above
).
In conjunction
with
a sampling
osc
ill oscope, a
buff
er amplifier will probably
be
necessary
to
bring the
signal to
an
adequate level. The amp
lifi
er s
hould
have
disto
rti
on
well under 1% and ba
ndwidth
f lat
to
200k
Hz or
mo r
e.
Measurements made with the B & K Mode l 1
61
should
be
made according to the manufacturer
's
instructions. Th e
window width
of the Model 161 is 0.1 a
while the spec
ifi
cations
of
the 1383 are given in terms
of
a
window
of
0.2
a.
The
spec
ifi
ed valu
es,
if
divided
by
2, will
gi
ve values for a
window
of 0
.1 a with
adequate accuracy.
It will
not
be
poss
ible
to read
the panel meter of the B & K
1
61
with
suff ic ient accu racy
for
measu
rements at 3 a.
Use
a
counte r
with
the digital ou
tput
accordi
ng
to
the
manufacturer's instructions. The test setup
is shown in
Figure
7-
5.
SERVICE AND MAINTENANCE 7-3
Page 24

GR
777-03
ADAPTOR
TEKTRONIX
54
3
GR874-R33
j
PATCH CORD
GR 1
383
RANDO
M- NOISE
G
ENERAT
OR
S
AM
PLING
OSCILLOSCOPE
GR 1340
PULSE
G
ENERATOR
GR
874-0BPA
ADAPTOR
GR 119 1
COUN
TER
1383-7
Figure 7-5. Test setup
for
measuring the amplitude
density distribution
us
ing the B & K Analyzer.
Use
of
the Ouan'Tech Model
317
Amplitude Distributi
on
Analyzer.
Th
e Ouan-Tech Model 3
17
Amp
lit
ude Distribution
Analyzer will not m
easure the amp
lit
ude density, but
will
me
asu
re the amplitud
e dis
tributi
on. Wh
en
it
is
used with
the Te
ktr
onix Model 1 S1 Sampli
ng Unit
, no
buffe
r
amplifier is n
ece
ssary. Compari
son
of
measured val
ues
of
the ampl
itude distributi
on
fun
cti on with those for
the
Gaussian
distr
ibut
ion given in Table 3-1 will sh
ow how
closely the distr
ibuti
on
function
is Gauss
ian. Initi
al
adjustment of the
input
level will have to be made w
ith the
front
pan
el
ATTEN and
VAR
ATTEN contr
ols. An
adequate way
to
pro
ceed is
to
offset the LE
VEL contr
ol
(which sets the value of sig
ma
at which the
meas
urement is
made)
fr
om its mid-ran
ge
value by one unit (correspondi
ng
to
one
a).
Th e
full
ran
ge
of
thi
s co
ntr
ol is pl
us
and min
us
5
a.
The
att
enuators should then be set
so
that
the meter
indic
at
es 15.8 percent. Then,
if
the LEVEL co
ntr
ol is
turned
tw
o units
from
mid-range, the meter should indicate
2.27%, et
c.
The ma
nufacturer
's inst
ructions will
be
found
he
lpful.
The test setup
is shown in Figure 7-
6.
GR 874-R22A
TEKT
RON
IX
54 3
PATCH CORD
SAMPLING
\
OSCILLOSCOPE
GR 138 3
~
RANDO
M- NOISE
'
GE
NE RATOR
}--'
~
T
.
7.2.4
Other Tests.
Output Attenuator Accuracy .
T
he
accuracy
of
the o
utput
att
enuator
can
be checked
by compari
son
with some other
att
enuator such as
that
in
t
he
Rhode & Schwarz USVH Selectiv
e Microvo ltmeter. The
compar
ison can
be
made at any frequency w ithin the r
ange
of
the
two
ins
tru
ments, using the noi
se
as the test signal.
Voltmeter Accuracy.
Th e volt meter can be checked to its specif ied
acc
uracy of ±5% by using a Ballantin e Model 3
23
True-rms
Voltmeter
as
a standard. Connect it
to the
output
of the
1383 by a
ca
bl e that is terminated at the voltmeter with
an
874
-W5
0B 50-
Sl
Termination, using an 874-T T
ee
and
an
874
-0B
PA
Adaptor (GR874
to BNC) to connect to the
voltme
ter. T
he
termination, located at the vo
ltm
eter,
ensur
es
that there are no standing wav
es
on the cabl
e.
The
indication of
th
e Model 323 Voltmeter will be
half that of
the
pa
nel meter (which indicat
es the open-circ
uit output
voltage
). Allow the 1383 to r
eac
h th ermal equi l
ibriu
m in its
case
so
that temperature-compensati
on elements in the
me
ter circuit will operate properly.
GR
874
-R33
PATCH CORD
j
0 - T 317
....--
AMPLI
TUDE
DIST R IBUTION
r
'--i..,-
ANALYZER
l~GR874
-
QBPA
ADAPTOR
~
R
777
-03
7-4
SERVICE
AND
MAINTENANC E
ADAPTOR
GR874
- R
22A
PAT
CH CORD
---........
GR 1340
PUL
SE
G
ENERA
TOR
Figu
re
7-6. Test setup
for
measuri
ng
the ampli-
tude
distributi
on
with
the Ouan-Tech Analyzer.
1383-B
Page 25

7.3 RECALIBRATION.
If repa
irs are rnade
that
include the replacement
of
some
compo nents, the internal control
s noted bel
ow
may
have
to
be readjusted (
see
Figur
es
8-1
and 8-2). The
requir
ed
test e
quipment
is listed in Table
7-2.
Allow
a
'/,-hour warm-up period,
with
the instrument in the cabinet,
before making adjustments.
R525·
This potentiometer
is
adjusted
to
set
the
voltage at
the output
of
the regulated + 10 V supply.
Connect a de voltmeter from
AT531 (nega
tiv
e)
to AT5
30
(positive) and
set
R525
so
th at the
voltmeter
indicates 10
V.
The negative 10-V supply is controll
ed
by
the positive
10-V supply.
If the negative s
upply
is
appreciably
differen
t
from
-10 V , measured
from AT5
32 (negative)
to
AT531
(p
os
iti
ve), R525 can
be
reset slightl y
to
ave
rage
the
two
magnitudes about 10 V.
R 143:
This potentiometer sets th e magnitude
of
the
de
plate c
urrent in the noi
se
diod
e,
V901,
and
th ereby
co
ntrol
s the magnitude of the noi
se
output
of the 1383.
To
set
R 143,
turn
the O
UTPUT
LEVE L control
on the
front
panel fully
clockwise and
set the
potentiom
eter
so
that the
meter indi
cates
full
scale.
Then
turn
the
OUTPUT
LEVEL
contro l co
unt
ercloc kwi
se,
to
redu
ce the indicati on
of
the
meter
by
1 dB. R
ese
t R 143
to return
the meter indicati on
to
full
scale.
This
sets
the noise l
evel so
that there
is
a
r
ese
rve ampl itude
of
1 dB beyond
full
sca
le und er normal
con
dition
s.
T202: Adjustment
of the core inside this coil varies
the frequ
ency of the
osc
ill
ator
. Using a grid-dip meter,
set
the frequency
of
the oscill
ator
to 60 MHz,±1 MHz. When
r
ep
lacing the cover over the oscilla
tor
and modular board,
tight
en the f
our scr
ews
fairly
tight, but not
as
tight
as
absolutely
possible (the
"finger
stock"
material makes the
best grounding connections
for shielding when
not
pressed
abso
lut
ely flat).
R327:
Thi
s potentiometer adjusts the de bias
conditions
on the o
utput stag
e,
to
compensate for
different
cu
rrent gains in the
output
transistors,
0308
and
0309.
Using a de voltme
ter,
with
th e OUTPUT
LEVEL
cont
rol
turned
full
y countercl
ockw
ise,
adjust R 327
so
that
the
voltage from the
collec
tor
of
0309
to
ground is 2
V,
positive. A
further
refin
eme
nt
of
this adjustme
nt
is
to
observe the amp
litud
e distribution
of
the noi
se
at
full
amp
litud
e ou
tput
and adju
st
R327
for bes
t symmetry.
Thi
s
i
s,
however, a complicated procedure, and the simpler
ad
jus
tment
given
first
usua
lly suffi
ces
to produce
sat
isfac
tory
results .
R322:
Thi
s potentiometer adjusts the sensitivity of
the
voltmeter on the pane
l.
To
properly adjust this co
ntrol
,
it
is n
ecessa
ry
to
measu
re the o
utput
noise voltage. Connect
the ou
tput,
by means
of
a 50-
D.
cable,
to the
input
of
the
Ba
llantine 323
True-rms
Voltmete
r.
The
cab
le should be
terminated at the voltmeter by
an
874-W50B 50-D.
Termination using
an
874-T Tee.
An
874-0BPA
Adaptor
(GR874
to
BNC)
is
useful in making cl
osed
connecti
on to
the voltmeter. With
th
is arrangement, th e cab le is
terminated in a match
ed
load; therefo re, the
Bal
lant ine 323
Voltmeter
will read ha
lf
the voltage
indicated
by the panel
meter, which indi
ca
tes the open-circuit
output
voltag
e.
After the 1383
has
been
in its
cab
inet long enough
to reac
h
ther
ma
l equi
libriu
m,
set
the
OUTPUT
LEVEL
control so
that the Ballantine
Voltmeter rea
ds exactly 0.5
V. Then
slide
the 1383 forward,
out
of its
cabine
t, and set R322
(on the under sid
e)
so
that
the panel meter indicates
exactly 1
V.
TABLE 7
-2
Equipment required
for
recalibration.
INSTRUMENT
Voltm
ete r
Grid Dip Meter
Mul
ti
meter
REQUIREMENTS
True rm
s,
20
MHz
upper
fr
equency
limit
Must cover
60 MHz
20,000 D.!V
sens
iti
vity
RECO
MMENDED
Ballantine
Model 323
Millen No.
90651
Triplett
Model
630A
SERVICE AND MAINTENANCE 7-5
Page 26

7.4 TROUBLE ANALYSIS .
A sine-wave si
gnal of
40 to 80 MH z
from
a signal
generator,
such
as
the
GR
1003, may
be
substitut
ed
for
the
noise sour
ce
of
the 1383. Apply the si
gna
l from the
gene
rator through a 1-kD. resistance
to
AT101
of
the 1383
with
V901 removed.
Set
the OUTPUT
LEVEL
control
fully
cw
and
the METER
FULL
SCALE switch to 1 V. With the
1383 functioning
properly, a 300-500
p.V
signal
will
give a
full-scale meter deflection over the entire 40-80 MHz
range.
A 500-p.V,
50-MHz signal
from
the generator should
produce a 15
mV signa
l at the
output
of
the 40-80 MHz
amp
lifi
er (AT1 02). This
input
shou
ld
also
produce a signal
of
approximately 500 mV, 10 MHz at the OUTPUT
terminals.
TABLE 7-3
DC
Test Voltages
Conditi ons:
Lin
e,
115 V,
ac,
60H
z
Meter
Fu
ll
Sca
le switch, 1 V
Output
Level, Full ccw
All
voltages to
chassis
ground. Readings t
aken
with 1806 Electronic
Volt
meter or equivalent.
TEST
POINT
DC
TEST
DC
TEST
DC
VOLTS
POINTS
VOLTS
POINTS
VOLTS
Amplif
ier, 40
-80 MHz
0101 E
c
0102
E
c
0 103 E
c
0 104 E
c
0 105 E
c
0106
E
c
0 107 E
c
0 108 E
c
0109
E
c
Local
Osci
llator, 60 MHz
0201A
E
c
02018
E
c
0202
E
c
+0.7
- 5.2
-5.8
+0
.03
-5.8
-0
.06
+07
- 5.2
- 5.8
0
-5.8
- 0.15
+0.65
- 5.2
-5.8
0
-5
.8
-
-0.15
-0.8
0
-0
.8
0
+005
+9.6
*Vari
es
with
setting
of
bias contr
ol, R327.
7-6 SERVICE AND MAINTENANCE
0203
E
c
0204
E
c
Video
Amp
lifier
030
1 E
c
0302
E
c
0303
E
c
0304
E
c
0305
E
c
0306
E
c
0307
E
c
0308
E
c
0309
E
c
0310
E
c
-0
.7
+3.8
-0.7
+9.6
+0.75
-5.2
- 5.8
-
0.3
- 5.8
+0.5
+0.75
- 5.2
-6.0
- 0.5
- 6.0
- 0.2
+0.7
-5.0*
-5.6*
-0.7
*
-5.6*
+2.0*
-0.8
+3.0
Regulator, ±10 V
050
1 E (AT527)
c
0502
E
c
0503
E (A T523)
C (AT530)
050
4 E
c
0505
E (AT529)
c
0506
E (A T526)
C (AT532)
Filament Regulator
0
11
0 E (AT109)
c
01
11
E
c
0112 E
c
0901 E (AT10
6)
C (AT11
2)
V90 1
#3
(AT112)
#4
(AT108)
+15.0
+13.5
+5.0
+ 14.4
+14.5
+10
.0
0
- 14.0
- 15.0
- 13.5
- 14.0
-10.0
-60.0
-62.0
-66.0
-6
4.0
-64
.0
-60.0
-66
.0
-6
4.0
-6
4.0
- 60.0
Page 27

7.5 KNOB REMOVA
L.
To
remo
ve
the knob on a front-panel control, either
to rep
lace one that h
as
been
damaged or
to
replace the
associated
co
ntrol,
pro
ceed
as
follow
s:
a.
Grasp the knob
firmly
with
the finger
s,
close
into
the panel (or the indicator dial,
if
appli
cable)
and pull the
knob straight, away
from
th e pane
l.
CAUT
ION
Do n
ot
pull on the dial to remo
ve a dial/knob
assembly. A lways remove the knob first.
b.
Observe the position
of
the
setsc
rew in the
bu
shing, w ith respect to any
pan
el markings (or at the
full
CCW
pos
iti
on
of a co
ntinuous
cont
rol).
c.
Release
the
setsc
rew with
an
All
en
wrench and pull
the bushing
off
the shaft.
d. Remove and retain th e
black
nylon
thrust
washe
r,
behind the
dial/knob
assemb
ly,
as
appropriate.
NOTE
To
sepa
rate the bushing
from
the knob,
if
for
any r
eason
they shou ld be combined
off
the
instrument, dri
ve
a machine-screw tap a turn
or
two
int
o the bushing to provide sufficient grip
for
easy
separation.
7.6 KNOB INSTALLAT ION.
To install a
"Snap-on"
knob
assemb
ly on the control
shaft :
a.
Place the black
nylon
thrust
wash
er over the
contro l sh
aft,
if
appropriate.
b. Mou
nt
the bushing on the sh
aft,
using
sma
ll slotted
pi
ece
of
wrapping paper
as a sh
im
for
adequate clear
ance.
c.
Orient the
setsc
rew on the bushing
with
respe
ct to
the panel-marking index and
lock the setscrew wi
th
an
Allen wrench.
NOTE
Make sure that the end
of
the shaft d
oes
not
protrude through the bushi
ng
or the knob
won't
sea
t properly.
d. Place
the knob on th e bushing wi
th
the re
tenti
on
sp
rin g opposite the
setsc
rew.
e.
Push
the knob in
until
it bottoms
and pull
it
slightly
to
check that the retention spring
is
seate
d in the
bushing.
NOTE
If
the retention sprin g in the knob comes loose,
reinstall
it
in the
interior
notch
with
the
sma
ll
sl
it
in the outer wall.
7.7 PILOT-LAMP REMOVAL.
To replace
the pi l
ot
lamp (
GE
No. 328,
GR
P/N
5600-0300),
remove th e instrument
from
its
cab
inet . Insert
a
sma
ll screw
dri
ver under the retaining str
ap
at the rear
of
the lamp holder. R
aise
the end of th e strap slightl
y and
it
will slide free, perm
ittin
g the lamp
to
be
withdrawn.
SERVI
CE
AND
MAINTENAN
CE
7-7
Page 28

Code
00192
00194
00434
00656
01009
01121
01295
02114
02606
02660
02768
03508
03636
03888
03911
04009
04713
05170
05624
05820
07126
07127
07261
07263
07387
07595
07828
07829
07910
0798
3
07999
08730
09213
09408
09823
09922
11236
11599
12040
12498
12672
12697
12954
13327
14433
14655
14674
14936
15238
15605
16037
17771
19396
19644
19701
21335
22753
23342
24446
24454
24455
24655
26806
28520
28959
30874
32001
33173
35929
37942
38443
40931
42190
42498
43991
9/68
Parts
Lists
and
Diagrams -Section
8
FEDE
'lAI.
1\nANUFACTURER'S CODE
From Federal Supply
Corl
~
for
Manufacturers Cataloging Handbooks H4-1
(Name
to
Code)
and
H4-2 (Code
to
Name)
as
supplemented through August, 1968.
Manufacturer
Jones
Mfg.
Co,
Chicago,
Illinois
Walsco
Electronics
Corp,
L.A.,
Calif.
Schweber
Electronics, Westburg,
L.l.,
N.Y
.
Aerovox
Corp,
New
Bedford,
Mass.
Alden
Products
Co,
Brockton, Mass.
Allen-Bradley, Co,
Milwaukee,
Wise.
Tex.as
Instruments,
Inc,
Dallas,
Texas
Ferroxcube
Corp, Saugerties,
N.Y. 124
77
Fenwal
Lab
Inc,
Morton
Grove,
Ill.
Am
phenol
Electron
Corp,
Broadvi
ew,
Ill.
Fastex, Des
Plaines,
Ill.
60016
G.E. Semlcon
Prod, Syracuse,
N.Y. 13201
Grayburne,
Yonkers,
N.Y. 10701
Pyrofilm
Resistor Co,
Cedar
Knolls,
N.J.
Clalrex
Corp,
New
York, N.Y.
10001
Arrow-Hart & Hegeman,
Hartford,
Conn.
06106
Motorola,
Phoenix,
Ariz.
85008
Engr
'd
Electronics,
San
ta
Ana,
Calif.
92702
Barber-Colman
Co,
Rockford
, Ill.
61101
Wakefield
Eng,
Inc,
Wakefield, Mass. 01880
Dlg
itron
Co,
Pasadena, Calif.
Eagle
Signal
(E.W.
Bliss
Co),
Baraboo
, Wise.
Avnet
Corp,
Culver
City,
Calif. 90230
Fairchild
Camera,
Mountain
View,
Calif.
Birtcher
Corp,
No. Los
Angeles,
Calif.
Amer
Semicond,
Arlington
Hts,
Ill.
60004
Bodi
ne
Corp,
Bridgeport,
Conn.
06605
Bodine Electric Co,
Chicago,
Ill.
60618
Cant
Device
Corp,
Hawthorne,
Calif.
State
Labs
Inc,
N.Y.,
N.Y.
10003
Borg
lnst.,
Delavan,
Wise.
53115
Vemaline
Prod Co,
Franklin
Lakes, N.J.
G.
E.
Semiconductor,
Buffalo,
N.Y.
Star-Tronics
Inc,
Georgetown,
Mass.
01830
Burgess
Battery
Co,
Freeport,
Ill.
Burndy Corp, Norwalk,
Conn.
06852
C.T.
S.
of
Berne
, In
c,
Berne, Ind.
46711
Chandler
Evans
Corp,
W.
Hartford, Conn.
Nati
ona
l S
emicon
duc
tor,
Danbury,
Conn.
Crystalonics,
Cambridge,
Mass.
02140
RCA, Woodbridge
, N.
J.
Clarostat
Mfg Co,
Inc,
Dover,
N.H.
03820
Dickson
Electronics,
Scottsdale,
Ariz.
Solltron
Devices,
Tappan,
N.Y.
10983
ITT
Semlcondictors, W.Palm
Beach, Fla
.
Corneii
-Du
blller
Electric
Co,
Newark,
N.J.
Corning
Glass
Works, Corning,
N.Y.
Gene
ral
Instrument
Corp,
Hicksville,
N.Y.
ITT, Semi
conductor
Div,
Lawrence, Mass.
Cutlet-Hammer
Inc,
Milwaukee,
Wis
e.
53233
Spruce
Pine
Mica Co,
Spruce
Pine, N.C.
Singer
Co,
Diehl
Div,
Somerville,
N.J.
Illinois
Tool
Works,
Pakton
Div,
Chicago
, Ill.
LAC
Electronics, Horseheads, N.Y.
Electra
Mfg Co,
Independence,
Kansas
67301
Fafnir
Bearing
Co,
New
Briton, Conn.
U I D
Electronics
Corp,
Hollywood,
Fla
.
Avnet
Electronics
Corp,
Franklin
Park
, Ill.
G.E.,
Schenectady,
N.Y.
12305
G.E.,
Electronics
Camp,
Syracuse, N.Y.
G.
E.
(Lamp
Dlv),
Nela
Park, Cleveland,
Ohio
General
Radio Co, W.
Concord,
Mass. 01781
American
Zettlet
Inc,
Costa
Meta,
Calif.
Hayman
Mfg Co,
Kenilworth,
N.J.
Hoffman
Electronics
Corp,
El
Monte, Calif
.
I.B.M,
Armonk,
New
York
Jensen
Mfg.
Co,
Chicago,
Ill.
60638
G. E.
Camp,
Owensboro,
Ky.
42301
Constanta
Co,
Mont.
19,
Que.
P. R.
Mallory & Co
Inc,
Indianapolis,
Ind
.
Marlin-Rockwell
Corp,
Jamestown
, N.
Y.
Honeywell
Inc, Minneapolis, Minn. 55408
Muter Co,
Chicago
, Ill.
60638
National
Co,
Inc, Melr
ose,
Mass. 02176
Norma-Hoffman, Sta
nford, Conn.
06904
Code
49671
49956
53
021
54294
54715
56289
59
730
59875
6
0399
61637
61864
63060
63743
65
0P.J
F'J092
70485
7:'
563
70903
-,
~
126
71
294
71400
71468
7
1590
71666
71707
71744
71785
71823
72136
72259
72619
72699
72765
72825
72962
72982
73138
73445
73559
73690
73899
74193
74861
74970
75042
75382
75491
75608
75915
76005
76149
76487
76545
76684
76854
77147
77166
77263
77339
77642
77630
77638
78189
78277
78488
78553
79089
79725
79963
80030
80048
80131
80183
80211
80258
80294
Manufacturer
RCA,
New
York,
N.Y.
1002
0
Raytheon
Mfg
CC",
Waltham, Mas
s.
021
54
c:~,ga
mo
Electric
Co, Sprlngf
iald,
Ill
62705
Sha
llcross
Mfg Co,
Selma,
N.C.
Shure
Brothers,
Inc,
Evanston
IlL
Sp
rague
Electric Co, N. AdaTls, Mass.
Thomas
and
Betts
Co,
E1 1
abeth,
N.J.
07207
TRW
Inc,
(Accessorl
e!o
Div),
Cleveland,
Ohio
Torringt
on
Mfg C ...
, 1
orrington,
Conn.
Union
Carbide C.J
rp,
New
York,
N.Y.
10017
United
-Ca
rr
Fastener
Corp, Boston,
Mass.
Victoreen
Ins
tru
ment
Co,
I n
r.:,
Cle
veland,
0.
Ward Leo
nard
El e
ctric
Co,
Mt.
Ve rnon, N. Y.
Westl,..g
hous
e (
Lamp
Olv). Bloo
mfield, N.J.
Wes
ton
Instruments, Newark,
N.J.
At
lan
tic-Indi
a Ru
bber, Chicago
, Ill.
60607
Am
perlte
Co,
Unio,.. C i
ty,
N.J.
07087
Belden
Mfg
Co, Chicago,
Ill. 60644
Bro
nson
Homer
D,
Co,
Beacon
Fall
s,
Conn.
Canfield,
H.O.
Co,
Clifton
Forge, Va.
24422
Bussman
(McGraw
Edison),
St.
Louts, Mo
.
ITT
Cannon
Elec,
L.A.,
Calif.
90031
Centra
lab,
Inc, Milwaukee,
Wise , 532
12
Continental
Carbon
Co,
Inc,
New York, N.Y.
Coto
Coli
Co
Inc,
Providence,
R.I.
Chicago
Miniature
Lamp
Works,
Chicago,
Ill.
Cinch
Mfg
Co,
Chic
ago
, Ill.
60624
Darnell
Corp, Ltd,
Downey,
Calif.
90241
Electro
Motive
Mfg
Co,
Wilmington, Conn.
Nytronics
Inc,
Berkeley
Heights, N.J.
07922
Dialight
Co,
Bro
oklyn,
N.Y.
11237
General I nstr
Corp,
Newark,
N.J. 07104
Drake
Mfg
Co,
Chicago,
Ill.
60656
Hugh
H.
Eby
Inc, Philadelphia,
Penn. 19144
Elastic
Stop
Nut
Corp,
Union,
N.J.
07083
Erie Technologic
al Pro
ducts
Inc, Erie, Penn
.
Beckman
Inc,
Fullerton,
Calif.
9263
4
Amperex
Electr
onics
Co,
Hicksville
, N
.Y.
Carling
Electric Co, W.
Hartford
, Co
nn.
Elco
Resistor
Co,
New York
, N. Y.
JFD
Electronics Corp
, Br o
oklyn, N.Y.
Hein
emann
Electric
Co, Trent
on,
N.J.
lndunrlal
Condenser
Corp,
Chicago,
1
11.
E.
F.
Johnson
Co,
Waseca,
Minn.
56093
lAC
Inc,
Philadelphia, Penn.
19108
Kulka
Electric
Corp,
Mt.
Vern
on,
N.Y
.
Lafayette I ndustrlal
Electronics,
Jamlca,
N.Y.
Linden
and
Co,
Providence, R.I.
Littelfu
se,
Inc,
Des
Pla
ines,
Ill.
60016
Lord
Mfg Co,
Erie, Penn. 16512
Mallory
Electric
Cor
p,
Detroit,
Mich.
482
04
James
Millen
Mfg Co, Malrl
en,
Mass.
02148
Mueller
Electric Co. Cleveland
, O
hio
44114
National
Tube
Co, Pittsburg,
Penn.
Oak
Mfg Co,
Crystal Lake, Il
l.
Patton
MacGuyer
Co, Providence, R.I.
Pass-Seym
our,
Svracuse,
N.Y.
Pierce
Roberts
Rubber
Co,
Trenton,
N.J.
Positive Lockwasher Co,
Newark. N.J
.
Ray-0-Vac
Co,
Madison
, Wise.
TRW, Electr
onic
Comp, Camden, N.J.
08103
General
instrumen
ts
Corp,
Brooklyn,
N.Y
.
Shakeproof
(Ill.
Tool
Works),
Elgin,
Ill.
60120
Sigma
Instrume
nts
Inc,
S.
Braintre
e,
Mass
.
Stackpole
Carbon
Co, St.
Marys,
Penn
.
Tinnerman
Products, Inc,
Cleveland, Ohio
RCA,
Rec
Tube & Semlcond,
Harrison, N.J.
Wiremold
Co, Hartfor
d,
Conn.
061
10
Zierl
ck
Mfg
Co,
New Roc
helle
, N
.Y.
Prestole
Fastener
, T o
ledo,
Ohio
Vickers
Inc,
St. Louts,
Mo.
Electronic I ndustrles
Assoc,
Washington, D.C
.
Sprague
Products Co, No.
Adams,
Mass.
Motorola
Inc,
Franklin
Park
, Ill.
60131
Standard
Oil Co,
Lafayette, Ind.
Bourns
Inc, Riverside, Calif. 92506
Code
80431
80583
807
40
81030
810
73
81143
813
49
81350
81751
81831
818
40
81860
82219
82273
82389
82647
82807
83033
83058
83186
83361
83587
837
40
83781
84411
84835
8
4971
86577
86684
86687
86800
88140
88219
88419
88627
89482
89665
9020
1
90750
90952
91032
91146
91293
91506
91598
91637
9
1662
91719
91929
92519
92678
93332
939
16
94144
9415
4
95076
95121
95146
9523
8
95275
95354
95412
95794
96095
96214
96256
96341
9679
1
96906
98291
98474
98821
99180
99313
99378
99800
Manufacturer
Air
Filter
Corp,
Milwaukee,
Wise.
53218
Hammarlund Co,
Inc,
New
York,
N.Y
.
Beckman
Instruments,
inc,
Fullerton, Calif
.
International
lnsturment,
Orange,
Conn.
Grayhill
Inc,
LaGrange,
Ill.
60525
lso
lantite
Mfg
Corp,
Sti
rling,
N.J.
07980
Military
Specificatio
ns
Joint
Army-Navy Specifications
Co
lumbus
Electronics
Corp,
Yonkers,
N.Y.
Filtron Co,
Flushing, L.l.,
N.Y.
11354
Ledex
Inc,
Dayton,
Ohio
45402
Barry-Wright
Corp,
Watertown.
Mass.
Sylvania
Elec
Prod,
Emporium,
Penn.
I
ndlana
Patte
rn & Model
Works,
LaPort, Ind
.
Switchcr
aft
Inc,
Chicago,
Ill.
60630
Metals & Controls
Inc, Attleboro,
Mass.
Milwaukee
Resistor Co,
Milwaukee,
Wise
.
Meissner
Mfg,
(Mag
uire
lnd) Mt.
Carmel
, Ill.
Carr
Fastener
Co,
Cambridge,
Mass.
Victory
Engineering, Springfield,
N.J. 07081
Bearing
Specialty
Co,
San
Francisco, Calif.
So
lar
Electric
Corp,
Warren,
Penn.
Union
Carbide
Corp,
New
York,
N.Y.
10017
Nation
al
Electronics
Inc,
Geneva,
Ill.
TAW
Capacitor
Div,
Ogallala,
Nebr
.
Lehigh
Metal
Prods,
Cambridge,
Mass.
02140
TA
Mfg
Corp,
Los
Angeles,
Calif.
Precision
Metal
Prods,
Stoneham,
Mass. 02180
RCA
(Elect.
Camp
& Dev),
Harrison, N.J.
A EC
Corp,
New
Rochelle, N.Y.
10801
Cant
Electronics
Corp,
Brooklyn,
N.Y.
11222
Cu
tler-Hammer
Inc,
Lincoln
, Ill.
Gould
Nat.
Batteries
Inc,
Trenton,
N.J.
Corneii-Dubilier,
Fuquay~Varlna
,
N.C.
K & G
Mfg
Co,
New
York,
N. Y.
Holtzer-Cabot
Corp,
Boston, Mass
.
United
Tiansformer
Co,
Chicago
, Ill.
Mallory
Capacit
or
Co,
Indianapolis,
Ind.
W
esting
house
Electric
Corp,
Boston, Mass.
Hardware
Products
Co,
Reading,
Penn.
19602
Continen
tal Wire
Corp,
York,
Penn. 17405
ITT {Cannon
Electric
Inc),
Salem,
Mass
.
Johanson
Mfg
Co, Boon
ton, N.J.
07005
Augat
Inc, Attleboro,
Mass. 02703
Chandler
Co,
Wethersfield, Conn.
06109
Dale
Electronics Inc,
Columbus,
Nebr.
E\co Corp
, Will
ow
Grove,
Penn
.
General
Inst
ruments, Inc, Dallas,
Texas
Honeywell Inc,
Freeport,
Ill.
Electra
lnsul
Corp,
Woodside,
L.l.
, N. Y.
E.G.&G
.,
Boston,
Mass
.
Sylv
ania
Elect
Prods,
Inc,
Woburn,
Mass.
Cramer Produ
cts
Co,
New
York,
N. Y.
10013
Raytheon
Co,
Compon
ents
Olv, Quincy,
Mass.
Tung
Sol
Electr
ic Inc,
Newark, N.J
.
Garde
Mfg Co,
Cumberland, R.I.
Qua
lity Components
Inc, St.
Mary's,
Penn
.
A
leo Ele
ctro
nics
Mfg
Co,
Lawrence,
Mass.
Continent
al
Connector Corp, Woodside, N.Y.
V
itramon,
Inc, Bridgeport,
Conn
.
Methode
Mfg
Co,
Chicago,
Ill.
Gene
ral
Electric Co,
Schenectady,
N.Y.
Anaconda
Amer
Brass
Co,
Torrington,
Conn.
HI-Q
Oiv, of
Aerovox
Corp,
Orlean,
N.Y.
Texas
Instruments
Inc, Dallas, Texas
75209
Thordarson-Melssner, Mt.
Carmel,
Ill.
Microwave
Associates
Inc,
Burlington,
Mass.
Amphen
ol
Corp,
Jonesville,
Wise,
53545
Military
Standards
S
ealectro
Corp,
Mamaroneck, N.Y. 10544
Com
par
Inc,
Burlingame,
Calif.
North
Hills
Electronics
Inc,
Glen
Cove,
N.Y.
Transltron
Electronics
Corp,
Melrose,
Mass.
Varian,
Palo
Alto,
Calif. 94303
Atlee
Corp,
Win
che
ster,
Mass.
01890
Delevan
Electronics
Corp
, E.
Aurora,
N. Y.
8-1
Page 29

MECHANICAL PARTS LIST
GR
Name
Description
Part Number
FMC
Mfg.
Part Number
F
edera/
Stock
No.
Cabinet
Complete,
Converti
ble-Bench
4181-2646
24655
4181-2646
Meter
Cover
ME3-701, light
gray
5720-3713
24655
5720-3713
Knob
Asm
.
OUTPUT
LEVEL
Knob,
including
retainer
5220-5402
5520-532
1 24655
5520- 532 1
Di
al
Asm.
METER
FULL
SCALE
dial,
including retainer
4123-3241
1383-1110 24655
1
383-1110
Knob
Asm.
METER
FULL
SCALE Knob ,
including
retainer
5220-5402
5500-5321 24655
5500-5321
Cover
Plate OUTPUT
Cover
Plat
e,
Complete
0480-24
70
24655
0480-2470
D
ress
Nut
For
Pow
er
Toggle Switch,
5310-344-3634
15/32-
32,
Dress
5800-0800
24655
5800-0800
Foot
R
ear,
black
Neoprene
Foot
5260-2060
24655
5260-2060
Foot
Ri
ght,
front
black Pheno li c
Foot
for
use
with
Bail
5250-2121 24655
5250-2121
Left,
front
black
Phenolic
Foot,
for
use
with
Bail
5250-2120
24655
5250-2120
Bail
Tilt-bar
support
5250-2125
24655
5250-2125
Fuseholder
Extraction -post
Fuse-mounting Dev
ice
5650-0100
71400
HKP-H
5920-284-7144
Output
Connector
Assemb
ly
0874-4624
24655
0874
-4
624
Panel
Jack
0874-6690
24655
0874-6690
8-2
Page 30

ETCHED
-CIRCUIT
BOARD
P/ N 1383-2711
0 901
V901
COVER
PLATE
P/N
0480 -2470
5!501
AT530
AT53
2
PL501
J 9
01
ArlO!
C506
csoa
$901
(HIDDEN)
C507
R504
C505
R917
ATI02
C504
C503
F502
R923
T202
FSOI
S502
ETCHED-
Cl RCUIT
BOAR D
P/N 1383-27
50
S5
01
T201
PLSOI
Figure
8-1.
Top
interior
view
of
the
Generator.
R525
R923
R917
R
322
R924
/.>"/
0503
csos
C506
5502
F502
C504
C507
Figure 8-2,
Bottom
interior
view
of
the
Generator.
C508
COVER PLATE
P/N
0480-2470
0308
0309
~,Y:H'T-
-
ETCHED-
CIRCUIT
BOARD
P/
N 1
383
-2731
J90
1
8-3
Page 31

PARTS
LIST
GR
Fed.
Ref.
No.
/)(
'>Crip/)
1)1
,
Part No.
Mfg. Code
Mfg.
Part
No.
Fed.
Stock
No.
CAPACITORS
C101
C
eramic
, ll.01
J-lF
+80-20
% 500 V
4406-
3109
72982
811,
0.
01
J-lF
+80 -20% 5910 - 754- 7049
C102
Ce
ramic,
0.001
J-lF
+80 -20% 500 V
4404-2109
72982
83
1,
0.001
J-lF
+80-20%
5910-983
-9994
C103
Ceramic,
0.1
J-lF
±20% 25 V
4400-2050
80183
5C13, 0.1
J-lF
5910- 974 - 5695
C104
Ceramic
, 33 pF ±5% 500 V
4404-0335
72982
831,33
pF ±5%
C105
Ceramic,
0.001
J-lF
+80
-20
% 500 V 4404-210 9
72982
83
1,
0.001
J-lF
+80-20%
5910-983-9994
C106
Ceramic,
0.001
J-lF
+80-20
% 500 V
4404-2109
72982
831,
0.001
J-lF
+80-20
% 5910 - 983 -9994
C107
Ceramic,
0.001
J-lF
+80-
20%
500 V
4404-2109
72982
831,
0.001
J-lF
+80-20% 5910-983
-9994
C108
Ceramic,
33
pF ±5% 500 V
4404-0335
72982
831, 33
pF ±5%
C109
Ceramic,
0.001
J-lF
+80-20
% 500 V
4404-2109
72982
831,
0.001
J-lF
+80 -20 %
5910-983-9994
C110
C
eramic,
51
pF ±5% 500 V
4404-0515
72982
83
1,
51
pF ±5%
C111
Ceram
ic , 56
pF ±5% 500 V
4404-0565
72982
83
1,
56
pF ±5%
C112
Ceramic,
0.001
J-lF
+80-20
% 500 V
4404-2109
72982
831,
.001
J-lF
+80
-20
% 5910-
983-9994
C113
Ceramic,
33
pF
±5% 500 V
4404-0335
72982
831 , 33
pF ±5%
C114
Ceramic,
0.001
J-lF
+80-20% 500 V
4404-2109
72982
831,
0.001
J-lF +80-20%
5910 -983 - 9994
C11 6
Ceramic,
0.1
J-lF
±20% 25 V
4400-2050
80183
SC1
3,
0.1
J-lF
5910-974-5695
C11 7
Ceramic,
0.001
J-lF +80-20
% 500 V
4404-2109
72982
831,
0.001
J-lF
+80- 20% 5910- 983 - 9994
C11 8
Ce
ramic,
0.001
J-lF
+80- 20% 500 V
4404-2109
72982
831,
0.001
J-lF
+80 -20% 5910- 983 -9994
C11 9
Ceramic,
0.1
J-lF
+80-20
% 10 V
4431-4109
80183
20C202, 0.1
J-lF
+80 -
20%
C120
Ceramic,
0.001
J-lF
+80 -20 % 500 V
4404-2109
72982
831,
0.001
J-lF
+80-
20%
5910- 983 -9994
C121
Ceramic
, 0.001
J-lF
+80 - 20% 500 V
4404-2109
72982
83
1,
0.001
J-lF
+80 -20%
5910- 983 -9994
C122
Ceramic,
0.001
J-lF
+80-20
% 500 V 4404-2109
72982
83
1,
0.001
J-lF
+80 -20%
5910- 983 -9994
C123
Ceramic,
0.1
J-lF
±20% 25 V
4400-2050
80183
5C13, 0.1
J-lF
5910 - 974-5695
C124
Ceramic
, 0.01
J-lF
+80-20
% 500 V
4406-3109
72982
811,
0.01
J-lF
+80- 20% 5910 -754 - 7049
C125
Ceramic,
0.01
J-lF
+80-20% 500 V
4406 -3109
72982
811,
0.01
J-lF
+80-20% 5910 - 754- 7049
C126
Ceramic,
0.01
J-lF
+80-20% 500 V
4406-
3109
72982
811,
0.01
J-lF
+80- 20%
5910 - 754 - 7049
DIODES
CR101
Type
IN750A
6083-1028
07910
IN750A
5960- 754- 5897
CR10 2
Type
IN748A
6083-1002
07910
IN748A
5960-800-3973
CR103
Type
IN4009
6082 -1012
24446
IN4009
596
1-
892-8700
CR104 Ty
pe
IN4009
6082-1012
24446
IN4009
596
1-
892 -8700
CR105
Type
IN400 9
6082-10
12
24446
IN4009
5961-892
-8700
CR201
Type
MS7330
6082-1027
13327
MS7330
CR202
Ty
pe
MS7330
6082-1027
13327 MS7330
RESISTORS
R1
01
Composition,
4 7 Q ±5% 1/ 4 W 6099
-04
75
75042
BT
S, 47 Q ±5%
R102
Composition,
560 Q ±5%
1/4
W
6099-1565
75042
BTS, 560 Q
±5
%
R1
03
Composition,
90.9 Q ±1% 1
/8
W
6250-9909
75042 CEA, 90.9 Q ±1%
R1
04
Composition,
10 Q ±1% 1
/8
W
62
50-0010
75042 CEA, 10 Q ±1%
R105
Composition,
510 Q ±5%
1/4
W
6099-1515
75042 BTS, 510 Q
±5
% 5905 -801-82
72
R106
Composition,
220 Q ±5% 1/ 4 W
6099-1225
75042 BTS, 220 Q
±5
%
5905-683
-2240
R107
Composition,
910 Q ±5%
1/4
W
6099-
1915
75042
BTS, 910 Q
±5
%
R110
Composition,
10 Q ±5% 1/ 4 W
6099-0105
75042 BTS, 10 Q
±5
% 5905-
809-8596
R111
Composi
tion, 10 Q ±5% 1/ 4 W
6099-0105
750
42
BTS, 10 Q ±5% 5905- 809 - 8596
Rll2
Composition
, 560 n
±5
% 1/ 4 W
6099-1565
75042
BTS, 560 Q
±5
%
Rll
3
Composition,
90.9 Q ±1% 1
/8
W
6250-9909
75042
CEA, 90.9 Q ±1%
R114
Composition,
10 Q ±1% 1
/8
W
6250-0010
75042
CEA, 10 Q ±1%
R115
Composition
, 510 Q ±5%
1/4
W
6099-1515
75042 BTS, 510 Q
±5
% 5905- 801-8272
R11 6
Composition
, 220 Q ±5%
1/4
W
6099-1 225
75042
BTS
, 220 Q ±5% 5905- 683 -2240
R11 7
Composition,
910 Q ±5% 1/ 4 W
6099-1915
75042 BTS, 910 Q ±5%
R120
Compos
iti
on, 10 Q ±5% 1
/4
W
6099- 0105
75042
BTS
, 10 0 ±5% 5905 -809- 859 6
R121
Composition,
10 Q ±5% 1/ 4 W
6099-0105
75042 BTS, 10 Q
±5%
5905 - 809 - 8596
R122
Composition,
47 Q ±5% 1
/4
W
6099-0475
75042 BTS,
47 Q ±5%
R1
23
Composition,
560 Q ±5% 1/ 4 W
6099
-15
65
75042
BTS
, 560 Q ±5%
R1
24
Composition,
90.9 n
±1
% 1
/8
W
6250-9909
75042 CEA, 90.9 Q ±1%
R125
Composition,
10 Q ±1%
1/8
W
6250-0010
75042
CEA, 10 Q ±1%
R1
26
Composition,
510 Q ±5% 1/ 4 W
6099-1515
75042
BTS, 510 Q
±5
% 5905 -801-8272
R1
27
Composition,
220 Q ±5% 1
/4
W
6099-1 225
75042
BTS
, 220 n
±5
%
5905-683
-2240
R1
28
Composition,
910 Q
±5%
1/ 4 W
6099-1915
75042
BTS
, 910 Q ±5%
R1
31
Composition,
470 Q ±5% 1/ 4 W
6099-1475
75042
BTS,
4
70 Q ±5
% 5905- 683 -2242
R1
32
Composit
ion, 4
70 Q ±5% 1/4
W
6099-1475
75042 BTS,
4
70 Q ±5
%
5905- 683
-2242
R1
33
Composition,
470 Q ±5%
1/4
W
6099-1 475
75042
BTS,
4
70 Q ±5
% 5905- 683 -2242
R1
34
Composition, 5.1
kQ ±5%
1/4
W
6099-2515
75042
BTS,
5.1
kQ ±5%
R1
35
Composition,
680 Q ±5% 1
/2
W
6
100-1
685
01121
RC20GF681J
5905-
195 -6791
R1
36
Composition,
100 Q ±5%
1/2
W
6100-1105
01121
RC20GF101J
5905 -1
90
-8889
R1
37
Composition
, 100 Q ±5% 1
/2
W 6100-1105
01121
RC20GF10
1J
5905 -1
90-8889
R1
38
Composition,
510 Q ±5% 1/ 2 W
6100- 1515
01121
RC20GF511J
5905- 2 79-3511
R1
39
Composition,
680 Q ±5%
1/2
W
6100-1685
01121
RC20GF68 1J
5905-195 -
679!
R140
Composition,
62 Q ±5
% 1/ 2 W
6100 -0625
01121
RC20GF 620J
5905-279-1760
R141
Composition,
150 Q ±5%
1/2
W
6100-1155
01121
RC20GF151J
5905-299-1541
R143 Pot. ,
Wir
e Wound 300 Q
±10%
6056-0135
11236 115 , 300 Q
±10%
R144
Composition,
10 Q ±5% 1/ 4 W
6099-0105
75042
BTS
, 10 Q ±5% 5905- 809-8596
R145
Composition,
10 Q ±5%
1/4
W
6099-0105
75042 BTS, 10 Q ±5%
5905- 809-8596
8-4
Page 32

OE
OE
PARTS
LIST
(Cont)
Ref.
No
.
D
escription
Part
No. FAIC 1
\f
{g.
Part
No.
TRANSISTORS
Q101
Ty
pe
2N3250
8210 -1089 802
11
2N
3250
Q102
Ty
pe
2N285 7
82
10-1088
24454
2N2810-A
Q103
Type
2N3646
82 10-1119
07263 2N3646
Q104 Ty
pe
2N3640
8210-
1129
93916
2N3640
Q105
Type
2N2857
8210-108 8 24454
2N28
10-A
Q106
Type
2N3646
8210-
1119 07263 2N3646
Q1
07
Type
2N3640
82
10-1129 93916 2N3640
Q108
Ty
pe
2N2857
8210 -1088 24454
2N2810 - A
Q109
Type
2N3646
8210 -111 9
07263 2N3646
QllO
Type 2N3905
8210
-ll1
4 047 13 2N3905
Q1ll
Type
2N3414
82
10-1047
24446 2N3416
Qll2
Typ
e 2N3414
8
210-1047
24446 2N3416
Q901
Type
2N3055
8210
-109
7
12672
40251
MISCELLANEOUS
Ll
01
Ll
02
T101
V901
Chok
e,
Molded,
0.15
J,J
H ±10%
430
0-0101
99800
1536 ,
0.15
J,JH
±10%
15
36,
0.15
J,JH
±10%
Choke
, Mold
ed,
0.15
J,JH
±10%
43
00-0101
99800
Co
il
5000-2711
24655
5000 -2 7
11
Type
5722
8380 -5722
82219 5722
103
1383-0710/5
Rll7
C~l
~~,~~_.
........
~~
AO
'*
T Rli O
RI140 150
A 017 0
etoe
.A
0
- :
-Ri
ll
Figure 8-3. Etched-circuit-board assembly
for
the
4(}.8G-MHz amplifier. The complete board
is
P/N
1383-2711.
E
0
NOTE: The number appearing
on
the foil
side
is
not the part number.
The dot
on
the foil at the transistor socket indicates the collector
lead.
Fed.
Stock
No.
5961 -945 -4108
5961 -
964-5753
5961-964-5753
5961 -989
-2749
5961 -989 -2749
Page 33

NO ISE
DIODE
1- - - - - - - - - - - -
IOI
T
AltO!
I
V901,-,~
I
1
g"J
4
RI02
560
Rl05
510
CI03
T0-1
Rl31
47
Rl
06
220
1
+
0V
Rl23
56
Rl26
510
AT530
Cll
J
0
DO
Rl
2:
B
OARD
1383-2711
40-80
RIIO
10
Rl
07
910
0
Rl12
560
Rll5
510
MHz AMPLIFIER
CI07
J .
Rl44
10
OOI
Rl32
47
Rl l7
91
0
0
CR
IOI
4.7V
Rl34
5JK
Rl2 0
10
Rl45
10
BOTTOM
1. POSITION
SHO
WN
2.
CO
NTA
EXPLAINED
SUPPLIED
3.
REFER
UCTION
APPEARING
4. RESIS
,
--
I
B
EO c
010
1
VIEW
OF TRANSISTO
NOTE UNLESS
OF
ROTARY SWITCHE
COUNTERCLOCKWISE.
CT
NUMBERING
ON SEPARATE SHEET
IN
INSTRUCTION
TO
SERVICE
NOTES IN
BOOK
FOR
VOLTAGES
ON
DIAGRAM.
TORS 1/4 W
ATT
....J
A
TI06
I
HIE
S
OF SWITCHE
BOOK
INSTR
.
Rl37
1
00
I/2W
CRI05
FILA
E
LOO B
c
0102,105,108
RS
SPECIFIED
S.
RESISTANCE
S
K - 1000
6. CAPACITANCE VALUES
S
OVER
THAN
.
7. 0 KNOB CONTROL
-
8. @
9. AT·
10. TP. TEST
Rl40
62
I/
2W
MENT REGULATOR
0901
IN
OHMS
OHMS
M 1
PICOFARADS.
IN
MICROFARADS.
TERMINAL
POINT
c
MEGOHM
ONE AND
LESS
0
IN
ONE
SCREWDRIVER CONTROL
ANCHOR
J OI
B
E
Oc
0103,104,106
0107,109
Cll6
--
---
c
,0
0 0
EG B
.
___
/
0111
,112
Rill
C
10
I
ATIIO
AT
II/
__
___
_j
OliO
ll7
TOOl
_j_CI25
JO,OI
--
WH-GN-BK
WHGN-
WH-GH- BR
--
BU
Rl21
10
AT508
AT514
AT509
A
T/04
-IOV
AT532
H.Rc
Fig
MHz
ure
8-4. Sche
amplifier.
Page 34

Cl02
.
001
RI02
560
J
Cl03
0.1
Rl31
470
Rl07
910
BOARD
RIIO
10
ClOG
.001
1383-2711
40·80
Rll2
560
MHz AMPLIFIER
CI07
1'.001
Rll3
Rl32
470
Rll7
910
Rl34
5,1K
Rl20
10
Rl23
560
1
+
0V
AT5
1'.001
30
Cll2
Rl33
470
RI2B
.910
-,
--
I
I
I
TO
AT201
Rl05
510
~~--,-------~------~------
FILAMENT REGULATOR
----
o e
,108
ECIFIED
,
RESISTANCE
K - 1000
.
CAPACITANCE
OVER
THAN
. Q
KNOB
8.
§)
SCREWDRIVER
. AT.
ANCHOR
. TP.
TEST
0
IN
ONE
--
c
0901 0103,104,106
IN
OHMS
OHMS
M 1
MEGOHM
VALUES
PICOFARADS. LESS
IN
MICROFARADS .
CONTROL
CONTROL
TERMINAL
POINT
Rl06
220
-
e
EOc
()107,109
ONE
AND
r-~~~--,----A
-----
,0
E8B
~~--
0111,112
c
0 0
Rill
..
·
10
_____
~
0110
Rl44
10
,-
-
-T~I049
-+--------,
A
Till
I
_j
Cll7
1'001
~--------~W~H~GN
--L
Cl25
JO,OI
WK-GN·BR
Rl26
CRIOI
4.7V
~-~
B~.--------__.AT50B
Rl45
10
Rl21
10
510
AT509
ATI04
·
IOV
AT532
Rl27
220
J.O()
CIIB
_ j
I
Figure 8-4.
Schematic
MHz amplifier.
circuit
diagram
of
the
40-80-
8-5
Page 35

Ref.
No.
CAPACITORS
C20I
C202
C203
C204
C205
C206
C207
C208
C2IO
C80I
C802
C803
C902
C903
C904
C905
RESISTORS
R20I
R202
R203
R204
R205
R206
R207
R~08
R209
R210
R211
R2I2
R2I3
R2I4
R2I5
R917 Pot. ,
R918
R9I9
R920
R92I
R922
MISCELLANEOUS
CR203
CR204
L80I
L802
L803
Q20I
Q202
Q203
Q204
T20I
T202
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Electrolytic,
Mica,
Mica,
Mica,
Filter,
Filter,
Filter,
Filter,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition, 3 k!1
Composition,
Composition,
Composition,
Comp., 1 k!1
Power,
Composition,
Composition,
Composition,
Composition,
Type
Type
Choke, Molded, 0.82
Choke, Molded, 0.82
Choke, Molded, 0.39
Type
TD-IOO
Type
Type
Type
2N3646
Coil
Transformer
O.OOI
0.001
0.001
24
220
O.OOI
IO
0.001
I70
pF
255
pF
232
pF
2500
2500
2500
2500
Wire
MS7330
MS7330
2N2369
2N3646
Description
IJF
+80-20% 500 V
IJF
+80-20% 500 V
IJF
+80-20% 500 V
pF
±5%
500 V 4410-0245
pF
±5%
IJF
+80-20% 500 V
pF
±IO%
IJF
+80-20% 500 V
IOO
iJF
+I50-10%
±I% 500 V
±I% 500 V
±I% 500 V
pF
pF
pF
pF
I 50 n
±5%
47
!1
±5%
1.5
kn
±5%
150
!1
±5%
4.7
k!1
±5%
IO
!1
±5%
20
!1
±5%
24
!1
±5%
24
!1
±5%
20
!1
±5%
IO
!1
±5%
±5%
910 n
±5%
910
!1
±5%
IOO
n
±5~I/4
±IO
Wound, 0. 7
30
!1
±5%
30
!1
±5%
30
!1
±5%
30
!1
±5%
±IO%
±IO%
±10%
Ass.
500 V
500 V
I5
V 4450-2800
I/
4 W
1/4
W
I/4
W
I/4
W
l/4
W
l/4
W
I/4
W
l/4
W
1/4
W
1/4
W
I/4
W
I/4
W
I/4
W
I/
4 W
W 6099-1105
0
!1
±10%
1/4
W
I/4
W
I/4
W
1/4
W
PARTS
LIST
GR
Part
No.
4404-2I09
4404-2I09
4404-2I09
4404-I225
4404-2I09
4404-0I08
4404-2I09
4710-0170
4710-0434
4710-0411
5280-0100
5280-0100
5280-0100
5280-0100
6099-1155
6099-0475
6099-2155
6099-1155
6099-2475
6099-0105
6099-0205
6099 -0245
6099-0245
6099-0205
6099-0105
6099-2305
6099-I915
6099-I915
6000-0300
6670-8709
6099-0305
6099-0305
6099-0305
6099-0305
6082-I027
6082-1027
4300-7524
4300-7524
4300-7523
82I0-1130
82IO-I052
82IO-I119
82I0-11I9
5000-2710
I383
-2200
Fed.
Mfg.
Code
72982
72982
72982
72982
72982
72982
72982
72982
56289
729I5
83I,
O.OOI
83I,
O.OOI
83I,
O.OOI
811, 24
83I,
220
83I,
O.OOI
83I,
IO
83I,
O.OOI
017872
DMI5
Mfg.
pF
pF
pF
(4CR),
Part
IJF
+80-20%
IJF
+80-20%
IJF
+80-20%
±5%
±5%
IJF
+80 -20%
±5%
iJF
+80-20%
I70
729I5 DMI5 (4CR), 255
729I5 DMI5 (4CR), 232
0112I
0112I
0112I
0112I
75042
75042
75042
75042
75042
75042
75042
75042
75042
75042 BTS, 20
75042
75042
75042 BTS, 9IO
75042
75042
0112I
75042
75042
75042
75042
75042
I3327
13327
99800
99800
99800
56289
FIB,
2500,
FIB,
2500
FIB,
2500
FIB,
2500
I50
BTS,
BTS, 47
BTS, 1.5
I50
BTS,
BTS, 4. 7
BTS,
IO
BTS, 20
BTS, 24 n
BTS, 24
10
BTS,
BTS, 3
k!1
9IO
BTS,
BTS,
IOO
JU, I
k!1
AS-10,
30
BTS,
30
BTS,
30
BTS,
30
BTS,
MS7330
MS7330
1025-I8,
I025-I8,
1025-10,
TD-100
!1
k!1
k!1
!1
!1
!1
!1
!1
±IO%
0.7
!1
!1
!1
!1
0.39
pF
pF
pF
pF
!1
±5%
±5%
!1
±5%
±5%
±5%
±5%
±5%
±5%
±5%
±5%
!1
±5%
!1
±5~
!1
±5
!1
±5%
±5%
±5%
±5%
0.82
0.82
±5%
±5%
±IO%
±10%
±10%
±IO%
93916 2N2369
07263 2N3646
07263 2N3646
24655
24655
5000-2710
1383-2200
n
No.
pF
pF
pF
±I%
±I%
±I%
Fed.
Stock
No.
5910-983-9994
5910-983-9994
5910-983-9994
5910-983-9994
5910-983-9994
5910-034-5368
59I5-908-I892
59I5-908-I892
59I5-908-I892
59I5-908-I892
5905-683-2243
5905-683-2243
5905-686-9998
5905-809-8596
5905-809-8596
5905-682-4097
5905-644-6789
5960-682-7755
8-6
Page 36

•
Figure 8-5.
oscillator
P/N
1383-2721.
Figure 8-6.
the
regulator
(refer
to
paragraph 4-1
Etched-circuit·board
and
modulator.
The
20.MHz low-pass filter is
circuit
etched
I.
The
board,
assembly
complete
P/N
for
the
board
is
hidden
by
1383-2741
NOTE: The number appearing
The
dot
on
the
foil
on
the
at
the
transistor socket indicates
foil side
is
not
the
part
number.
the
collector lead.
Page 37

INPUT
CABLE
r·,
\_;
AT202J.
RD
,-,
I
I o
~--
/
I
IR201
150
IArZOI
T I
C202
1
.oo1
-
R202
47
T201
3
MODULATOR
R207
20
AT2C
0
BOTTOM
E C 8
(cOO')
~
E G 8
0201
VIEW
R920
30
R919
30
OF
TRANSISTORS
0202
I
I
I
I
I
AT204
I AT203
L _
0203,204
R203
1.5K
-7V
R205
4.
7K
BOARD
I
I
1383-2721
24
.001
0204
'~'J""
C210
R212
3K
C205
220
60
MHZ
OSCILLATOR
R214
910
.
IOO~F
NOTE
1.
POSITION
SHOWN
2.
CONTACT
EXPLAINED
SUPPLIED
3.
REFER
UCTION
APPEARING
4.
RESISTORS 1/2
OF
ROTARY
COUNTERClOCKWISE.
NUMBERING
ON
IN
INSTRUCTION
TO
SERVICE
BOOK
FOR
ON
SWITCHES
OF
SEPARATE
NOTES
VOLTAGES
DIAGRAM.
WATI.
UNLESS
SWITCHES
SHEET
BOOK
.
IN
INSTR-
SPECIFIED
5.
RESISTANCE
K - 1000
6. CAPACITANCE VALUES
OVER
THAN
7. 0 .
8. G
9. AT-
10. TP-
IN
OHMS
IN
PICOFARADS.
ONE
IN
MICROFARADS.
KNOB
CONTROL
SCREWDRIVER
ANCHOR
TERMINAL
TEST
POINT
OHMS
M 1
CONTROL
MEGOHM
ONE
AND
LESS
Page 38

r - - - - - - T201
I
I
MODULATOR
R2
20
07
FILTER
C202
1 .oo1
-
I
I
I
I
AT204
I
I
AT203
----
L-
SIS
TORS
BASE
SE
~COLL
E~
0203,204
R202
47
R203
I.~K
-7V
R20~
4.
7K
BOARD
I
I
1383-2721
R21
3K
2
60
MHZ
OSCILLATOR
R214
910
AT
206-
R21~
100
I
R922
- -'V\31'.0-
I
_j
Tc902
-::-2500
-,--W-H-·R-0--84R
C903
T
-
Figure 8-7. Schematic circuit diagram
ator, modulator,
2~00
-
~
~~32
and
2~MHz
low-pass filter.
of
the oscill-
8-7
Page 39

Ref.
No.
CAPACITORS
C301
C302
C303
C304
C305
C306
C307
C308
C309
C310
C311
C312
C313
C314
C315
C316
C317
C318
C319
C320
C321
C322
C323
C324
TRANSISTORS
Q301
Q302
Q303
Q304
Q305
Q306
Q307
Q308
Q309
Q310
RESISTORS
R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R312
R313
R314
R315
R316
R317
R318
R319
R320
R321
R322
R323
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Composition, 4 70 n ±5% 1/2
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Pot.,
Pot.,
R324 Pot. ,
R325
Pot.,
R326 Pot.,
R327
R329
R330
R331
R332
R333
R334
R335
R336
R337
R338
R901
- R902
R903 ,Film,
Pot.,
Film,
Film,
Composition,
Composition,
Composition,
Composition,
Thermist
Composition,
Composition
Composition,
Film,
Film,
PARTS
LIST
GR
Part
No.
4450-2800
4404-G515 72982 831,
4450-5707
4400-2054
4400-2054
4450-2610
4450-5589
4400-2050
4404-0628
8210-1129
51
51
0.47
0.47
0.1
0.1
0.1
0.1
62
27
2N3640
Description
200
1-1F
+150-10% 6 V 4450-2610
100
1-1F
+150-10% 15 V
200
1-1F
+150-10% 6 V 4450-2610
100
1-1F
+150-10% 15 V 4450-2800
1-1F
±5%
500 V
1-1F
±5%
500 V 4404-0515
200
1-1F
+150-10% 6 V 4450-2610
330
1-1F
±20%
330
200
200
200
600
22
22
100
1-1F
1-1F
1-1F
1-1F
pF
pF
1-1F
1-1F
1-1F
1-1F
±10%
±5%
1-1F
1-1F
1-1F
±20%
±20
1-1F
1-1F
1-1F
±20%
±20%
±20%
±20%
6 V
±20%
6 V 4450-5707
+150-10% 6 V 4450-2610
+150-10% 6 V 4450-2610
25 V
% 25 V
+150-10% 6 V
+150-10% 3 V
±20%
15 V 4450-5300
±20%
15 V 4450-5300
+150-10% 15 V 4450-2800
25 V 4400-2050
25 V 4400-2050
25 V 4400-2050
25 V
500 V
500 V 4404-G275
2N3646 8210-1119
2N3646
2N3640
2N3646
2N3646
2N3250
8210-1119
8210-1129
8210-1119
8210-1119
8210-1089
A211 8210-1168
A211 8210-1168
2N3563
8210-1066
W 6100-1475
620 n
±5%
1/2
Comp.,
Comp.,
Comp.,
Comp.,
Comp.,
Comp.,
75 n ±1%
536 n
or,
142.3 Q
96.2 n
142.3 n
330 n
±5% 1/2
51 n
±5%
510 n
±5% 1/2
220 n
±5%
910 n
±5
kn
kn
±5% 1/2
±5%
±5% 1/2
±5% 1/2
% 1
±5% 1/2
±5%
5.1
5.1
130 Q
4 7 n
680 n
330 n
51 n ±5% 1/2
510 n
±5
±5%
±5
kn
±5%
kn
±5% 1/2
±5% 1/2
±20%
±5%
% 1
% 1
1/2
110 n
470 n
2.4
2.4
47 n
50 n
200 n
62 Q ±5%
10 Q ±5% 1/2
240 Q
±5%
500 n
±20%
±1% 1/8
430 n
w
±5% 1/2
43 n ±5% 1/2
1
kQ
±5
% 1
130 n
±5% 1/2
500 n
±10%
1.8
kn
4. 7 n
±1%
±5% 1/2
±5% 1/2
±5% 1/4
, 47 n
±1%
±1%
W
W
1/2
W
W
1/2
W
/2
W
W 6100-2515
1/2
W
W
1/2
W
W 6100-1685
W 6100-1335
W 6100-0515
/2
W
1/2
W
/2
W
1/2
W 6100-2245
W
W
1 W
W
W
1/2
W
W 6100-1435
W
/2
W
W 6100-1135
W 6100-2185
W
W
6100-1625
6100-1335 01121
6
100-0515
6100-1515
6100-1225 01121
6100-1915
6100-2515
6100-1135
6100-04
6100-1515
6100-1115
6100-1475
6100-2245
6100-0475
6040-0050
6110-1205
6100-0625 01121
6100-0105
6100-1245
6040-0300
6550-0075
6250-0536 75042
6100-0435 01121
6100-2105
6740 -1607
6100-04
6099-94
6610-1300
6610-1200
6610-1300
Fed.
Mfg.
Code
37942
56289
37942
56289
TI,
017872
TI,
017872
72982 831,
37942
37942
37942
37942
37942
80183
80183
37942
37942
TI,
TI,
TI,
TI,
TI,
5C13,
5C13,
TI,
TCM,
56289 150D226X0015B2
56289 150D226X0015B2
56289
80183
017872
5C13, 0.1
80183 5C13, 0.1
80183 5C13, 0.1
80183
5C13, 0.1
72982 831,
72982 831, 27
93916
07263
2N3640
2N3646
07263 2N3646
93916
2N3640
07263 2N3646
07263
80211
2N3646
2N3250
73445 A211
73445 A211
07263 2N3563
01121
01121
RC20GF471J
RC20GF621J
RC20GF331J
01121
01121
RC20GF510J
RC20GF511J
RC20GF221J
01121
01121
01121
01121
75
01121 RC20GF470J
01121
01121
01121
01121
01121
RC20GF911J
RC20GF512J
RC20GF512J
RC20GF131J
RC20GF681J
RC20GF331J
RC20GF510J
RC20GF511J
RC20GF111J
01121 RC20GF471J
01121
01121
01121
RC20GF242J
RC20GF242J
RC20GF470J
01121 FWC, 50
01121
RC32GF201J
RC20GF620J
01121
01121
RC20GF100J
RC20GF241J
01121 FWC, 500
75042
MEF-TO,
CEA,
01121
RC20GF431J
RC20GF430J
01121 RC20GF102J
75
75
01121
02606
01121
01121
01121
03888
03888
03888
RC20GF131J
LA25L2
RC20GF182J
RC20GF470J
Type
A3AJ01
A3AJ01-E
A3AJ01
Mfg.
200
1-1F
200
1-1F
51
pF
51
pF
200
1-1F
300
1-1F
300
1-1F
200
I-IF
200
1-1F
0.4 7 1-1F
0.47
200
1-1F
600
62
pF
pF
536 Q
CB,
Part
No.
6V
6 V
±5%
±5%
6 V
6 V
6 V
6 V
6 V
±20%
1-1F
±20%
6 V
1-1F
3 V
1-1F
1-1F
1-1F
1-1F
±10%
±5%
Q ±20%
Q
±20%
75 n ±1
±1%
4. 7 n
±5%
%
Fed.
Stock
No.
5910-945-1836
5910-034-5368
5910-945-1836
5910-034-5368
5910-945-1836
5910-945-1836
5910-945-1836
5910-974-5696
5910-974-5696
5910-945-1836
5910-729-9975
5910-752-4270
5910-752-4270
5910-G34-5368
5910-974-5695
5910-974-5695
5910-974-5695
5910-974-5695
5961-945-4108
5905-192-3973
5905-
279-1761
5905-192-3971
5905-
279-3517
5905-279-3511
5905-279-3513
5905-279-3509
5905-279-2019
5905-279-2019
5905-252-5436
5905-252-4018
5905-195-6791
5905-192-3971
5905-279-3517
5905-2
79-3511
5905-279-3515
5905-192-3973
5905-279-1877
5905-279-1877
5905-252-4018
5905-279-1760
5905-190-8883
5905-279-2593
5905-072-7795
5905-279
-3512
5905-279-1887
5905-195-6806
5905-252-5436
5905-190-8881
5905-252-4018
Page 40

--~-------
Ref.
No.
RESISTORS
R904
R905
R906
R907
R908
R909
R910
R911
R912
R913
R914
R915
R916
R923
R924
R925
MISCELLANEOUS
CR301
CR302
(cont)
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Composition,
Thermistor'
Composition,
Type
Type
Description
96.2 n
±1%
142.3 n
96.2
142.3 n
96.2
142.3 n
96.2 n
142.3
96.2 n
142.3
96.2 n
142.3
65.8 n
±1%
r!
±1%
±1%
r!
±1%
±1
±1%
r!
±1%
±1%
r!
±1%
±1%
r!
±1%
±1%
100 n
100 n
22 n ±5%
IN3604
IN3604 6082"1001 24446
L301 Choke, Molded, 0.15
L302
Choke, Molded, 0.15
L303 Choke, Molded, 10
M901
-----------
PARTS
Part No.
6610-1200 03888 A3AJ01-E
6610-1300 03888
6610-1200 03888 A3AJ01-E
6610-1300 03888 A3AJ01
6610-1200 03888 A3AJ01-E
%
±5% 1/2
W
±10%
1-1H
±10% 4300-0101 99800
1-1H
±10%
flH
±10%
6610-1300
6610-1200 03888
6610-1300 03888
6610-1200 03888
6610-1300 03888
6610-1200
6610-1300 03888
6610-0900
6100-1105
6740-1606
6095-0022 01121 HM, 22 n
6082-1001
4300-0101 99800
4300-2200 99800 1536,10
5730-1411
LIST
(Cont)
FMC
03888
03888 A3AJ01-E
03888 A3AG01
01121
02606
24446
24655
Atfg. Part No.
A3AJ01
A3AJ01
A3AJ01-E
A3A 01
A3AJ01-E
A3AJ01
A3AJ01
RC20GF101J
Type
LB21J1
±5
IN3604
IN3604
1536, 0.15
1536, 0.15
1-1H
5730-1411
%
1-1H
flH
±10%
±10%
±10%
Stock
P ed.
No.
5905-190-8889
5961-995-2199
5961-995-2199
8-8
Page 41

•
Figure
8-8.
Etched-circuit
video
amplifier
is P/N 1383-2731.
and
attenuator.
NOTE: The number appearing
The
dot
on
the
foil
at
the
transistor socket indicates
on
board
the
assembly
The
complete
foil side
SO
30
1
R:
. : (
·
~.1.
CABLEI
-=
YE I
I
I
I
I
for
the
board
is
not
the
part
number.
the
collector lead.
S
1.
POSITION OF R
SHOWN COUNTI
2. CONTACT
3. REFER TO SERY
4. RESISTORS
EXPLAINED
SUPPLIED
UCTION
BOOK
APPEARING
NUMB
ON
IN
ON
1/2
WI
IN
I
Page 42

---
1
+IOV
AT:504
AT~30
WH
R329
75
IW
R330
536 •
118W
RO
I
;
-
--
---
R310
130
IOO~fT
~~02
_,
C302
+
-:-
R307
910
VIDEO
AMPLIFIER
BOARD
1383-2731
R313
680
R318
470
.
SWITCHING
1.
POSITION ~ ROTARY
SHOWN
COUNTERO.OCKWISE.
2.
CONTACT
NUMBERING ~ SWITCHES
EXPLAINED
ON
TO
BOOK
SERVICE
ON
112
SEPARATE SHEET
FOR
DIAGRAM.
WATT.
SUPPLIED IN INSTRUCTION
3.
REFER
UCTION
AI'PEAIIING
4.
RESISTORS
DIAGRAM S901
NOTE
UNLESS
SWITCHES
BOOK
NOTES
IN
VOLTAGES
Sf'£C1Fim
.
INSTR-
R30~
510
R306
220
C304
r-IOO~F
EOs
BOTTOM VIEW
5.
RESISTANCE IN OHMS
K - 1000 OHMS M • I MEGOHM
6.
CAPACITANCE VALUES ONE AND
OVER IN
PIC~
THAll
7. Q KNOB CONTROL
8.
~
9. AT - ANCHOR
10. TP -
ARADS. LESS
ONE IN
MICR~ARADS
SCREWDRIVER CONTROL
TER-._
TEST
POINT
R309
5.1K
C B
EOC
0 307,309 0301,304,306
.
0306,310
OF
TRANSISTORS
EgB
030~.303
R316
510
R317
110
Rotary
from
digit
tion.
next
refer
position
the
screw
other
03, 04,
section.
contact
respective!
R320
2.4K
switch
the
the
panel
contact
section
back
contact.
sections
end
is
the
of
The
section
to
clockwise
above
contacts
etc),
is
the
are
proceeding
A
suffix F or R indicates
on
the
front
y.
are
of
the
number
nearest
the
2,
etc.
The
Contact
from a strut
locating
numbered
clockwise
or
rear
shown
as
shaft.
refers
to
panel
next
two
01
is
screw
key),
sequentially
around
of
the
---IOV
AT532
viewed
The
the
is 1,
the
(usually
and
that
section,
R92~
first
sec-
the
digits
first
the
(02
the
the
22
4W
---
[TC
TO
,
Page 43

+-lOY
AT~30
WHROBK
--------------
----l
C312
0 .
471
23
J
--IOV-
AT532
-:-
R925
22
4W
[TO
R329
75
IW
--
C31~
600~F
AT308
TO
AT305
R338
4.7
I/4W
-=J;c?r
C314
200~F
L303
IO~H
R333
680
C309
330~F
R336
910
METER
CR301
I 50302
CIRCUIT
R321
(\
47
AT307
CABLE
QR~2
WH-VT-GY
111901
BK
cw
5901 5901
203R
· 103t-
O.IMY
AT
906._-'VII'v-,..__.
R924
t•
IOO
AT908~._;.;,fv.-J,--e
\METER FULL SCALE I
'I
I-----109F
~----IIOF
L------IIIF
J
-80d8
102t
-2008
-IOdB
OdB
,",
CABLE
GN
J9
01
s
viewed
The
first
the
sec-
is
1,
the
wo
digits
the
first
(usually
and
the
ally
(02,
und
the
that
the
section,
Figure 8-9.
amplifier
and
Schematic
attenuator.
circuit
diagram
of
the
video
8-9
Page 44

Ref.
No.
CAPACITORS
C501
C502
C503
Ceramic,
Ceramic,
Electrolytic,
+100-10% 10 v
C504
C505
Electrol%tic,
+100-10 0 100 v
Electrolytic,
+100-10% 25 v
C506
Electrolytic,
+100-10% 25 v
C507
Electrolytic,
+100-10% 25 v
C508
Electrolytic,
+100-10% 25 v
C509
C510
C511
C512
C513
C514
C515
C516
C517
C518
C519 Ce
C520
DIODES
CR501
CR502
CR503
CR504
CR505
CR506
CR507
CR508
CR509
CR510 Ty
CR511
Ceramic,
Ceramic,
Electrolytic,
Ceramic,
Electrolytic,
Ceramic,
Electrolytic
Ceramic,
Ceramic,
Ceramic, 0.47
ramic,
Electrolytic
Type
IN4140 6081-1014
Type
IN4140 6081-1014
Ty
pe
1N4140 6081-1014
Type
IN4140 6081-1014
Type
IN3253 6081-1001
Type
IN3253
Type
1N3253 6081-1001
Type
1N3253
Type
IN3253 6081-1001
pe
IN3253 6081-1001
pe
IN3253
Ty
CR512 Type 1N3253
CR513 Type
CR514 Ty
CR515
TRANSISTORS
Q501
Q502
Q503
Q504
Q505
Q506
RESISTORS
R501
R502
IN4009 6082-1012
pe
1N750A 6083-1028 07910
Type
IN4009 6082-1012
Type
2N3905
Type
2N3903
Type
2N3740
Type
2N3905
Type
2N3903
Type
40250
Composition,
Composition,
R503 Low Power
2W
R504 Low
Power, Wire
2W
Low
R505
Power,
2W
R506
R507
R508
R509
R510
R511
R512
R513
R514
R515
R516
R517
R518
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Low
Power,
2W
R519
R520
Composition,
Composition,
PARTS
LIST
Description
0.01 flF +80-20 % 500 V
0.0068
+80-20
3600, 1800, 1800
450, 225, 225
1500, 750, 750
% 500 V
flF
flF
iJF
1500, 750, 750 iJF
1500, 750, 750
iJF
1500, 750, 750 iJF
0.01
iJF
+80-20
0.01 iJF
200
470
pF
100
% 500 V
+80-20
% 500 V
iJF
+150-10% 6 V
±10% 500 V
i-LF
+150-10% 15 V
0.47 iJF ±20% 25 V
, 200 iJF +150-10 % 6 V
0.1 iJF ±20% 25 V
GR
Part No. Mfg.
4406-3109
4406-2689
4450-5609
4450-4000
4450-0700
4450-0700 90201 203828S10C10X2
4450-D700 90201
4450-0700
4406-3109
4406-3109
4450-2610
4404-1478
4450-2800
4400-2054
4450-2610
4400-2050
Fed.
Code
72982 811, 0.01
72982
80183
74861
90201
Mfg.
Part
flF
0.0068 +80-20%
811,
D-38841
1B850RT
203828S10C10X2
203828S10C10X2
90201
72982 811, 0.01
72982
37942
72982
56289
80183 5C13,
37942
203828S10C10X2
iJF
811,
0.01
TT,
831, 4
iJF
200 iJF 6 V
70
pF
Dl7872
0.47
TT,
200
i-LF
80183 5C13, 0.1 iJF
0.1 iJF ±20% 25 V 4400-2050 80183 5C13, 0.1 iJF
iJF ±20% 25 V
0.011-LF
, 15
i-LF
+80-20
4400-2054
% 500 V 4406-3109 72982 811, 0.01iJF
80183
+150-10% 15 V 4450-3700 37942
5C13, 0.47 iJF ±20%
TT,
15
iJF 15 V
13327 IN4140
13327
1N4140
13327 IN4140
13327 1N4140
6081-1001
6081-1001
6081-1001
6081-1001
79089
79089
79089
79089
79089
79089
79089
79089
1N3253
1N3253
1N3253
IN3253
IN3253
IN3253
IN3253
IN3253
24446 IN4009
IN750A
2N3903
2N3903
RC20GF621J
BWH,
2.7
BWH,
2.7
75042
BWH,
2.2
RC20GF511J
RC20GF331J
01121 RC20GF330J
BWH,
75042
2.2
7.5
620
Wire
Wire
33
680
33
330
100
510
330
330
330
33
680
33
Wire
75
1.5
24446 IN4009
8210-1114
8210-1132
8210-1121
8210-1114
8210-1132
8210-1095
kfl
±5% 1/2
fl
±5
Wound, 2. 7
Wound,
Wound, 2.2
fl
±5
fl
±5% 1/2
fl
±5%
fl
±5%
fl
±5% 1/2
fl
±5% 1/2
fl
±5%
fl
±5%
fl
±5%
fl
±5%
fl
±5%
fl
±5%
Wound, 2.2
fl
±5%
kfl
±5%
W 6100-2755 01121 RC20GF752J
% 1/ 2 W
fl
±10%
2.7
fl
±10%
fl
±10%
% 1/ 2 W
W
1/2
W 6100-0335 01121 RC20GF330J
6100-1625 01121
6760-9279 75042
6760-9279 75042
6760-9229
6100-0335 01121 RC20GF330J
6100-1685 01121 RC20GF681J 5905-195-6791
1/ 2 W 6100-1335 01121 RC20GF331J
W
W
1/2
W
1/2
W
1/2
W
1/ 2 W
1/2
W
1/2
W
fl
±10%
1/2
W
1/2
W 6100-2155 01121 RC20GF152J
6100-1105 01121 RC20GF101J 5905-190-8889
6100-1515 01121
6100-1335 01121 RC20GF331J
6100-1335 01121
6100-1335 01121 RC20GF331J
6100-0335 01121 RC20GF330J
6100-1685 01121 RC20GF681J 5905-195-6791
6100-0335
6760-9229
6100-0755 01121 RC20GF750J 5905-279-1758
04713 2N3905
93916
93916 2N3740
04713 2N3905
93916
12672 40250
No.
+80-20
+80-20
+80-20
±10%
iJF ±20%
6 V
+80-20
fl
±10%
fl
±10%
fl
±10%
fl
±10%
5910-754-7049
%
5910-448-5397
5910-976-9415
5910-976-9415
5910-976-9415
5910-976-9415
5910-754-7049
%
5910-754-7049
%
5910-945-1836
5910-034-5368
5910-974-5696
5910-945-1836
5910-974-5695
5910-974-5695
5910-974-5696
5910-754-7049
%
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-892-8700
5960-754-5897
5961-892-8700
5905-249-4195
5905-279-1761
5905-794-3857
5905-794-3857
5905-192-4490
5905-192-4490
5905-192-3971
5905-279-3511
5905-192-3971
5905-192-3971
5905-192-3971
5905-192-4490
5905-192-4490
5905-841-7461
Fed.
Stock
No.
8-10
Page 45

Ref.
No.
RESISTORS
R521
R522
R523
R524
R525
MISCELLANEOUS
F501
F502
PL50l
P50l
S50l
S502
{cont)
Film,
Co
mposition,
Film
, 4.42 k!J ±1% l / 4 W
Comp
Po
t.,
Wire
S10-B10
S10-Bl0
Power,
Pilot
Power/OFF
Line
Voltage
S0901 Tube
T501
Power
Description
5.11
H! ±1% l / 4 W
1.6
os
iti
on, 100
Wound, 1 k!J ±10%
6/10A
3/10A
Input
Selector
k!J ±5% 1/ 2 W
!J ±5% l / 2 W
PARTS
LIST
(Cont)
Part
No.
6350-1511
6100-2165
6350-1442
6100-1105
6056-0138
5330-1100
5330-0800
4240-0600
5600-0309
7910-1300
7910-0831 42190
7530-0200
0485-4037
FMC
75042
01121
75042
01121
11236
71400
71400
91146
71744 #330
04009
CEB,
RC20GF162J
CEB,
RC20GF101J
115' 1
MDL, .6 Amp
MDL, .3
45002
83053
4603
81350
24655
TS102C01
0485-4037
Mfg.
Part No.
5.11 k!J ±l%
4.42 k!J ±l%
k!J ±10%
Amp
-SA
Fed.
Stock
No.
5905-279-3507
5905-190-8889
5920-280-3161
5920-235-8362
5930-909-3510
5935-232-3
758
ll
0
0
Page 46

Figure 8-10. Etched-circuit-board assembly
power·supply.
The
complete
board is P/N 1383-2750.
for
the
NOTE: The number appearing on
The
dot
Figure 8-11. Etched-circuit-board assembly
±10
on
V regulator circuit.
P/N
1383-2741.
the
foil
at
the
transistor socket indicates
The
the
complete
foil side
is
not
for
the
board is
the
the
collector lead.
part
number.
Page 47

JPOWERJ
5501
1383-
r---
BOARD
2750
ATI09
AT508
ATIII
33
R515
33
R514
330
R516
2.2 ,
2W
1.
POSITION
OF
SHOWN
COUNTERCLOCKWISE.
2. CONTACT NUMBERING
EXPLAINED
SUPPLIED
3.
REFER
UCTION
APPEARING
4. RESISTORS 1/2 WATT.
TO
BOOK
ON
IN
SERVICE
NOTE
ROTARY
SEPARATE
INSTRUCTION
NOTES
FOR
VOLTAGES
ON
DIAGRAM.
UNLESS
SWITCHES
OF
SWITCHES
SHEET
BOOK
IN
BOTTOM VIEW
E B C
~
0501,502
0504,505
SPECIFIED
5.
6. CAPACITANCE VALUES
.
7. 0 KNOB CONTROL
INSTR-
8.
9. AT-
10. TP. TEST
OF
RESISTANCE
K - 1000
OHMS
OVER
IN PICOFARADS. LESS
THAN
ONE
IN
{§;)
SCREWDRIVER
ANCHOR
POINT
TRAN SISTORS
E
0
0503,506
IN
OHMS
M 1
MEGOHM
ONE
MICROFARADS.
CONTROL
TERMINAL
AND
BOARD
138
Page 48

1383-2750
---
r-
YE
e
9
VT
BOARD
ATI09
WH·GN·Bt<
AT50B
WH-GN
Alii
·BR
I
WH·GN
~501
Wtj-BlJ-BK
AT528
R5l5
33
33
C511
200
C515
200
.
C509
+
R512
.
01
330
---
R505
22
2W
CR513
R509
330
R513
330
R514
330
R518
2.2,2W
BOARD
R511
510
C513
100
0504
1383
- -
--
CR514
4.7V
-2741
- - -
C512
470pt
R522
16K
- -
- - - -
R520
1.5K
R525
IK
cw
C520
15
--
AT~23
WH·GY
·BR
AT~21
I
AT~30
W
R521
5.11K
114W
R523
4.42K
114W
--
-
~T~~
·RO
C514
0.47
AT531
C518
0.47
WH-f!O~R
AT532
WH-G'I'-GN
I
AT525
I
WH-GY.RO
I
AT524
I
WH-VT-111<
_j
-BK
AT903
0503
•IOV C902
ATI03
AT304
-IOV
C903
ATI04
AT305
0506
BOTTOM
E B C
'e5'
0501,502
0504,505
NSTR
VIEW
OF
TRANSISTORS
E
0
0503,506
SPECIFIED
5.
RESISTANCE IN OHMS
K - 1000 OHIIIS Ill I IIIEGOHM
6. CAPACITANCE VALUES ONE AND
OVER
IN
PICOF
THAN
7.
0 KNOB CONTROL
·
8.
(§}
9. AT.
10. TP.
ARAOS. LESS
ONE
IN
IIIICROf
SCREWCJliVER CONTROL
ANCHOR
TERMINAL
TEST
POINT
ARADS.
Figura 8-12. Schematic
supply.
circuit
diagram
of
the
power
8-11
Page 49

GENERAL
WEST
CONCORD,
617
SALES
RADIO
MASSACHUSETTS
369-4400
AND
SERVICE
01781
AUSTRALIA
Warburton
Pty.
Ltd.
Sydney,
Brisbane,
CANADA-
•
General
Radio
Toronto,
Montreal,
DEMOCRATIC
OF
THE
Rudolph·Desco
New
York
INDIA
Motwane
Bombay,
l(anpur,
Bangalore,
Frankl
Melbourne,
Adelaide
C&nad&
Ottawa
CONGO
Private
Clllcutta,
New
Delhi,
Madras
lndustnes
Limited
REPUBLIC
Co.,
Inc.
Limited
Lucknow,
ATLANTA
•BOSTON
BRIDGEPORT
•CHICAGO
•cLEVELAND
COCOA BEACH
•DALLAS
DAYTON
JAPAN
Mi
dortya
Tokyo
KOREA
M-C
International
San
Francisco,
Seoul,
Korea
MALAYSIA
Vanguard
Kuala
Lumpur,
MEXICO
Fredin
S.A.
Mexico,
NEW
ZEALAND
W, & K.
Auckland
PAKISTAN
Pakland
Karachi
PHILIPPINES
T.
J.
Wolff & Company
Mllkati,
PORTUGAL
Ad.
Auriem&,
New
York,
Madrid,
Electric
and
Company
O,F,
McLean
Corporation
RIZIIII
and
Inc.
Lisbon
404 633-6183
646-0550
617
203 377-0165
992-0800
312
216 886-0150
800 241-5122
214 637-2240
513 434-6979
Co.,
Ltd.
SINGAPORE
Malaysia
Limited
SPAIN
WEST
REPUBLIC
AFRICA
G.
H.
Langler & Co.,
Johannesburg
SOUTH
AMERICA
Ad.
Auriema,
New
York
TAIWAN
He•ghten
Taipe•
THAILAND
G.
Simon
Ltd.
Bangkok
TURKEY
Mevag
Eng•neering,
and
Industrial
Istanbul
DENVER
DETROIT
GREENSBORO
HOUSTON
HUNTSVILLE
INDIANAPOLIS
•LOS
ANGELES 213 469-6201
•NEW
YORK
INTERNATIONAL
CONCORD,
OF
SOUTH
and
CENTRAL
Inc,
Scientific
Radio
Company
Ltd.
Co.,
Ltd.
Trading
Corporation
MASSACHUSETTS
303 44 7-9225
313 261-1750
919 288-4316
713 622-7007
800 241-5122
317 636-3907
(NY) 212 964-2722
201
943-3140
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