TM 9-2350-275-BD
Procedural Steps (Cont):
i. Check the power supply in the receive mode by noting the reading on the
INDICATOR METER (12) and turning the VOLTAGE CHECK/OPERATE SWITCH (28)
clockwise to the 6,3B and the 150B positions. The needle on the INDICATOR METER
(12) should be in the shaded portion of the scale for all readings. If not in the shaded
portion, check the power supply for bad fuses and replace any bad ones.
CAUTION
Do not operate the transmitter without using an
antenna or dummy load. Transmitting into
an antenna base without connecting an antenna
may damage the transmitter portion of the radio.
j. Check the power supply in the transmit mode by placing the VOLTAGE
CHECK/OPERATE SWITCH (28) to the 1,2B position on the transmitter circuits portion
of the scale (approximate y the 7 o'clock position). The INDICATOR METER (12) should
read in the shaded portion of the scale. If not in the shaded portion, check the power
supply for bad fuses and replace any bad ones.
k. Place the VOLTAGE CHECK/OPERATE SWITCH (28) in the 150B position by
rotating the switch clockwise. Momentarily place the chest plate switch and the CVC
helmet or H-189 switch in the transmit position. Note the reading on the INDIATOR
METER (12); it should be in the shaded portion of the scale. Release the switches.
l. Place the VOLTAGE CHECK/OPERATE SWITCH (28) alternately in the 250B
and 600B positions by rotating the switch clockwise. To obtain an indication, it is
necessary to momentarily depress the switches to transmit. Both the readings should be
in the shaded portion of the scale.
m. Place the VOLTAGE CHECK/OPERATE SWITCH (28) in the operate #1
PABOTA 1) position.
n. Place the PRESET CHANNEL/CONTINUOUS TUNE SELECTOR SWITCH (18)
in either the I or 11 position. Position I will be used if the desired operating frequency is
between 20 and 35.75 MHZ and position II will be selected if the desired operating
frequency will be between 35.8 to 51.5 MHZ. Band selections are also shown by the
BAND INDICATOR (13) lights.
To calibrate the FREQUENCY DIAL, rotate the FREQUENCY TUNING KNOB
(27) while looking into the FREQUENCY DIAL VIEWING WINDOW (5) and select the
frequency listed below that is the closest to the desired operating frequency.
22.050 MHZ 28.350 MHZ 34.650 MHZ
Band I:
Band II:
36.225 MHZ 40.950 MHZ 42.525 MHZ 45.675 MHZ 48.825 MHZ
The frequencies are noted on the frequency dial with an extended graduation line
11-34