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Frequency
Range:
Crystals:
Frequency Tolerance:
Supply Voltages:
Output Impedance:
Tubes:
SPECIFICATIONS
1600 Kc to 540
Kc.
2
Vacuum Crystals.
±5
cycles, typical
±2
cycles.
18
-210
Volts
D.C.
@
10
MA.
6.3
Volts
A.C.
@
1.2
Amps.
High
Z
(capacity coupled).
2
Type 12BY7A.
TUNING PROCEDURE FOR THE M5422 OSCILLATOR
The following tuning instructions should be followed when placing
the
M5422 oscillator
in
operation.
If
this
procedure
is
not fol-
lowed,
it
is
possible
to
tune the
oscillator
to
the 2nd
harmonic
of the
crystal rather than
the
fundamental.
Information
that follows was
obtained with
the
M5422 oscillator
connected
to its
proper
R.F.
load and
30
feet of RG -62/U cable
connected
to
the
monitor terminal
#6
with shield
to
ground
or
terminal
#7.
RG -62/U
cable runs 13.5 uufd. per
foot, or
a
total of
approximately
400 uufd.
effective capacity
on the
30
foot length.
Shorter lengths
of
cable
on
frequencies above
600 Kc
will effect the tuning of the
unit.
More tuning capacity
(C9)
or
more turns
of the
slug
in L3
may
be
required
for
resonance.
Shorter lengths
of
monitor cable
on
frequencies from
600 Kc
to
540 Kc
may prevent
the
unit from tuning
to
resonance.
If
this
is
the case,
capacity should
be
added across
the
cable
to
make
up the
difference
in
effective capacity.
Longer lengths
of
cable would mean
less capa-
city
or less
inductance needed
for
resonance
in
this
frequency
range.
It
is
recommended
that the
proper length
of RC
-62/U he used
whenever
possible.
FREQUENCIES FROM
1600
KC
TO 800
KC.
1.
NO
PADDING needed
in
this range.
2.
Make sure that slug of
L3
is
screwed
all the
way
out.
From 1600
Kc to
approximately
1100 Kc, tune C9 for dip
in
plate
current
or
peak
in
grid
current
of
following
stage.
If C9
does
not tune
through resonance, screw
in
slug
on L3
a
turn
at
a
time
until resonance
is
obtained with
C9.
800 Kc
is
tuned with
C9
near
maximum capacity
and slug
on L3
screwed
in
7
turns.
If
above pro-
cedure
is
not
followed
it
will
be
possible
for
crystals from
approximately
900 Kc
to
800 Kc to
tune
to
their
2nd
harmonic
if
slug
in
L3 has not
been screwed down
to
approximately
7
turns
for
800
Kc.
-1-
M5422 Oscillator
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