DYNAMIC
MUTUAL
CONDUCTANCE
DYNA-JET
INSTRUCTION
TUBE
TESTE<R
MANUAL
OPERATING
Model 707
DYNA-JET
INSTRUCTIONS
FOR
DYNAMIC
B & K DIVISION
1801
MUTUAL
TUBE
West
Chicago,
CONDUCTANCE
TESTER
Of
DYNASCAN CORPORATION
Belle
Plaine
Avenue
lliinois
60613
Information
on
your
new
Dyna-Jet
Model
707
Tube
Tester
No.1-The
the
TV
tubes
only a minimum
No.2-The
tubes
bridge.
is
usually
Dyna-Jet
No.3-Each
1 megohm.
furthermore
No.4-Gas,
closed
little
No.
tubes
ient
for
No.6-The
)f
this
Model
made
in
for
their
Some
tubes
sufficient.
Emission
These
this
by
an
exceptionally
as 2 or 3 microamperes
5--Each
can
be
checked
selecting
instrument.
707,
such
for
simple
Dyna-Jet
general
use.
number
Model
707 will
Dynamic
such
Tube
circuit.
tube
is
tests
test
is
grid
emission,
section of a
and
dual
section
Model
707
All
of
as 10
pin
installation
WHAT IT
Model
707
Tubes
of
controls
provide
Mutual
Conductance
as
diodes
types
tested
automatically
are
made
made
before
or
even obscure
sensitive grid
of
current
dual-section
selected for
tubes
is
obsolescence
the
new
tubes,
if a new
WILL
Tube
Tester
can
be
tested
need
be
set.
accurate
are
checked
in
the
checked
between
the
the
Gm
current
in
the
tube
balance
to
be
used
proof
type
sockets
compactrons,
type
of
DO
will
check
more
in
an
incredibly
results
(Gm)
for
switch
various
measurement.
grid-to-cathode
grid
is
between sections.
in
push-pull
as a result
are
nuvistors, etc.
socket becomes necessary.
Qecause
in a true
emission only,
section
for
shorts
elements
check.
This
circuit.
checked
separately.
circuits.
included
than
short
it
transconductance
since
are
tested
and
leakage
of
the
leakage
test
will reveal
This
of
the
switch
in
this
section
Provision
99%
time
checks
this
in a new
tube
are
all
Therefore
is
conven-
section
is
since
most
up
of
of
test
to
and
dis-
as
the
also
General
Information
on
your
Dyna-Jet
Model
707
TESTING
In
radio
diodes)
are
horizontal
fore,
any
turn, is
results
sistance
on
amount
current.
inclusive single
oscillators)
the
most
radio
or
governed
The
mutual
from a
The
amplification
of
the
Since
Rl
the
Gm
The
Gm
of
a.c.
This
Measuring
used
TV
is
of
for a given
TUBES
and
television
as
some
important
tube
by
its
conductance
small
change
stage.
constant
the
tube.
signal
is
done
the
mutual
test
that
FOR
DYNAMIC MUTUAL CONDUCTANCE
circuits
type
of amplifier.
are
basically a mplifiers
characteristic
'will
function
mutual
conductance.
is
the
in
grid
where
:
6I
= a
p
6E
= a
g
of a circuit
in
tube
voltage
by
means
can
= GmRI.
any
circuit,
can
be
to
the
of
a sensitive
conductance
be
made
practically
to
in
its
ratio
voltage.
change
small
we see
measured
grid
of a tube
on
Even
with
be
checked
circuit, is
of
the
in
plate
change
Where
that
accurately
and
measuring
bridge
any
tube.
all
tub
oscillator
regenerative
to
its
ability
change
signal
in
grid
Rl
the
amplification
circuit.
provides
es
(except
circuits
determine
to
in
the
current.
signal
voltage.
is
the
equivalent
by
applying
the
resulting
the
most
rectifiers
(i.e.-R.F.
feedback.
how
amplify.
plate
current
depends
accurate
and
There·
effectively
This,
that
load
directly
the
correct
a.c.
plate
and
01
in
re-
all
TESTING DUAL TRIODES
Each
section
pressing a push
balance
between
of a dual-section
button
switch.
sections.
This
AND
tube
Therefore,
test
is
illustrated
TEST I
OTHER
is
checked
tubes
MULTI·SECTION TUBES
separately
can
in
Fig.
be
checked
1.
METER
and
quickly
and
by
selected
defor
The
it
quickly
fier,
and
In
order
we
must
There
the
grid
to
what
draws
current
"negative
1
Figure
I-Each
TESTING TUBES
Grid
picks
R.F.
look
is
of
is
grid
a tube.
known
Emission
tuner
to
into
normally
and
out
those
circuits.
understand
the
theory
some
Some
as
"grid
commonly
current"
can
B+
Section of Multisection Tube Tested Separately.
FOR
GRID EMISSION AND GAS
Gas
Test
is
an
tubes
which
how a tube
of
electron
little
of
this
vapor
emission",
known
be
followed
l'~re
2-Negative
invaluable
can
cause
can
have
tubes.
evaporation
tends
where
as
"negative
in
Figure
Grid Curren1.
to
of
the
trouble
"grid
the
deposit
grid
grid
2.
aid
in
in
emission"
cathode
on
itself
current".
Rp
TV
a.g.c.,
coating
the
emits
servicing
sync,
and
grid
and
electrons
The
I.F.
"gas
material
gives
flow
because
ampli-
current"
on
rise
and
of
this
The
electrons
supply
to
age
drop
positive
than
If
a
slight
cathode
electrons,
strike
the
electron
flow
current"
positive by
Now
emission
that
the
grid
In
Figure
the
bias
because
of
drive
the
the
grid
across
the
it
normally
amount
will collide
leaving
positive
grid,
taking
of
this
and
can
be
this
"gas c,prrent".
let
us
see
current
or
would
3, a
typical
voltage
in
the
flow
tubes
to
flow
from
leak
resistor
grid
leak
would
of
"gas"
with
molecules
ions
an
electron
"gas
current"
traced
what
happens
gas
current
tend
to
I.F.
that
stage
of
current
saturation,
the
grid
Rg
resistor
with
is
present
(ionization).
from
on
Figure
go
more
stage,
and
through
causing
to
and
up
Rg
no
grid
of
the
the
is
exactly
2.
if
an
I.F.
(negative
positive
we
see
other
clipping
the
plate
to
the
is
such
emission.
in a tube
gas
Some
grid
to
the
same
Notice
amplifier
grid
if
negative
that
if
associated
Rl.
Making
or
then
back
grid
again.
that
it
causes
some
of
and
may
of
these
form a gas
as
it
that
tube
grid
is
any
stages
the
is
again
current).
there
overloading.
through
Notice
the
the
electrons
knock
positive
molecule
for
the
the
grid
in a TV
In
Figure 2 we
current
negative
will
go
grid
more
the
that
grid
to
off
one
ions
again.
"grid
is
made
set
flowed.
grid
more
positive will
power
the
go
more
from
or
more
may
emission
more
has
noted
current,
positive
volt·
the
then
The
grid
After
signal
is
oscillator
black
portions
To
achieve
was
employed.
~
..
detection, a video
clipped
in
an
to
synchronize
the
video
Figure
sensitive
I.F.
Figure
5-Overloaded
will
try
of
this
+ k I -
--·-~-·N~AlIV[
Figure
signal
stage
(B).
4-Normal
grid
~
3-Typical
normally
it
will
both
on
This
results
or Clipped Video and Sync Signal.
emission
AGe
VOUAGt
I.F.
Stage.
appears
like
blanking
in
pulling
gas
test.
as
Figure
signal
or
the
look
the
Video and Sync Signal.
or
I>
shown
5.
snaking
circuit
in
Now
(A)
Figure
the
and
of
shown
horizontal
on
the
picture.
in
4.
If
the
Figure
the
very
Ii
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