Operation Outside Amateur Bands - TM-11-5820-554-120083

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

multimeter dip.

the 8-ampere type supplied.

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

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