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Section III. OPERATION - TM-11-5820-554-120082
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TM-11-5820-554-12 Radio Set AN/FRC-93(V)1 AN/FRC-93(V)2 AN/FRC-93(V)3. AN/FRC-93(V)4 AN/FRC-93(V)5 AN/FRC-93(V)6 AN/FRC-93(V)7 Manual
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Section IV. OPERATOR'S MAINTENANCE INSTRUCTIONS - TM-11-5820-554-120084


TM 11-5820-554-12
l. Once the equipment has been tuned up on a
fins 30L-1, the Collins KWM-2/2A will then remain
given frequency, the Collins 30L-1 may be switched
in tune.
into or out of the circuit by operating the ON-OFF
d.  Set the Collins KWM-2/2A EMISSION
switch.
Output power from the amplifier is
switch to the TUNE position, and set the MIC
available instantly with no warm-up period required.
GAIN to the OFF position.
CAUTION
e. Set the Collins 30L-1 METER switch to the
DO NOT operate the Collins 30L-1
TUNE position.
into a load presenting a vswr greater
f. Set the BAND switch to the same band as
than 2 to 1. The equipment may not
that of the Collins KWM-2/2A, the LOADING
function properly and damage may
control to 1 on the dial, and the TUNING control to
result. DO NOT operate the amplifier
the white area for the band in use.
in continuous key-down condition at
g. Press the Collins 30L-1 ON-OFF switch to
full input for more than 30 seconds.
the ON position.
The power supply may be damaged.
h. Set the MIC GAIN control to about three-
DO NOT use the Collins 30L-1 in fsk,
quarter full scale.
am., or fm service.  DO NOT use
i. Immediately adjust the TUNING control for
slow-blow fuses or fuses larger than
the 8-ampere type supplied.
j.
Alternately adjust the TUNING and
LOADING controls for zero multimeter reading.
11-11. Operation Outside Amateur
The meter will indicate zero at the dip when the
Bands
amplifier is properly tuned and loaded.  Always
Operation outside amateur bands requires retuning
make the TUNING adjustment for meter dip the last
of the Collins 30L-1 input circuits. This action is
adjustment.
necessary to present the proper load impedance to
k. Switch the Collins KWM-2/2A to the desired
the exciter.  Direct support will retune the input
sideband or to cw, and reduce the MIC GAIN
circuits (TM 11-5820-55403401).
control to normal operating level. The station is now
ready to operate at rated power input.
Figure 11-4. Collins 30L-1, operating controls.
ELODOO36
Change 1 11-6


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