RCA st 2013 schematic
The
Nuvistor Triode
In
Video
IF-Amplifier Circuits
by
K.
W.
ANGEL
and
J.
GOTE
Reprinted from
Broadcast & Television Receiven
Publication No. ST-2013
IRE
Transactions
July, 1961
RADIO CORPORATION
Electron Tube Division
Harrison
On
OF
AMERICA
New Jersey
Printed in
U.S.A.
•
THE
The
6C14
that
the
systems.
specified
cheaper
On
upacitance,
at
therefore.
neutraliution
uniform
greatly
NEUTRAL IZATlOIl
neutraliution
conditiona
development
Nuvistor
the
Nuviator
and
the
other
high
If
triodea
triode
high-figure-ol-merit
could
The
basic
performance;
more
hand,
triodes
gains
require
characteristics
aimplify
and component
NUVISTOR TRIODE
ABSTRACT
This
paper
discusses
atage
Theoretical
practical
techniques.
are
must
if
amplifiers
designs
of
television
ha.
auggested
.1ao
be used
question
reliable
thsn
neutralization
because
ne
more
tetrodes
more
to
be uaed
be
simple,
variation,
than
stable-gain
characteristics
to
is
triodea
tetrodes
of
high
difficult
snd
careful
However,
of
the
in
stable
are
one
Nuvistor
problema.
an
K•••
Radio
Electron
the
and
places
limits
presented.
tuners
using
the
possibility
advantage
of
cost
are
inherently
and
pentodes.
grid-ta-plate
to
nabilize
pentodes
and
expensive
the
relatively
if
amplifier,
with
snd
inexpensive.
IN
VIDEO IF-AMPLIFIER CIRCUITS
Angel
Corporation
Tube
Harriaon,
use
of
particular
are
the
of
in
if
for
a
snd,
triode
changing
by
and
J.
Gote
of A..
rlca
DI.llion
N.
J.
the
Nuvistor
also
the
it
neceasary
of
both
reaiatance.
therefore, a more
(known
best
csuse
circuit
ficient
spproaches
balance.
practicsl
and
of
an
and
arrangement, which
zation
triode
emphasis
discussed
resiative
the
The
tapped-coil
as
the
baaic
of
ita
sa
of
However,
more
complete
RC
network
An
equivalent
uses
fewer components
of
the
in
two-
on
neutralization.
and
the
component
to
compensate
plate
reaistance
The
grid
satisfactory
Rice System
neutralization
simplicity
the
point
msgnetic
unity,
systems
the
the
is
balsncingmay
in
parallel
system
usea
grid
circuit,
and
three
results
of
the
bridge
for
the
aide
arrangement
of
coupling
uaually
and
is
leas
operating
of
neutralization)
method
and
ita
application.
bridge
coefficient
tapped-capacitor
that
is
removes
approaches
less
require
with
is
shown
of
branches
loading
the
plate
reaiative
shown
for
use
between
of
than
L2.
easier
in
the
effects
dropping
point.
in
triodes
of
the
As
the
Ll and
perfect
coupling
one-half,
the
addition
to
Fig.2.
neutraliinductive
make.
and,
Fig.l
is
the
be-
grid
coef-
L2
apply
Thia
in
•
Fig.1-
aent
(Rice
A
neutralization,
Conaiderable
tion
tion
cinl
output
So-ic
for
.,_tea
number
of
of
a good workable and
ayatell.
All
neutrali~ation
of • bridle
of
the
tapped-coil
triode
of
circuit.
attention
tube
.a
GrrQnge~
could
all
have
ha.
been
inexpenaive
circuit.
either
one
branch.
neotrali%Gtion
neotrali%otion).
but
havinl
be
uaed
aome
given
involve
the
to
drawbscks.
to
the
neutraliza-
the
input
With
tiiode.,
effect
selec-
balan-
or
the
p p
(A)
elements
of
tion
circuit
Usinl a aimilal
plate
introducea
aystem
the
band
and
facilitatea
eau_ea an
circuit
undeairable.
from
the
pssa
eliminates
bridle-balance
r--------~----,------,
I
,
I
::;::
C
QIl
,
I
I
C
•
N
bridle
haa
little
ali,nment.
unavoidable
tapped-coil
n
(B)
branchea
effect
Unfortunately,
3-db
srrangement
the 10••
problema
K
ao
on
gain
in
that
that
r--
I
lL
-'-
C-;;r
I
I
~--
tuning
neutraiiza-
reduction.
il.
gain,
make
p
this
the
bu~
the
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