TM 55-1930-209-14&P-12
3. The unit should be mounted so the controls and microphone are both visible and readily accessible.
Refer to Figures 1 and 2 for electrical and mechanical installation aids.
MECHANICAL
The transceiver can be mounted in any attitude or on any suitable surface. Normal installation includes under the
dashboard, on top of the dash or desk, or on the cabin overhead. To install, simply secure the "U"-shaped bracket to the
mounting location, then secure the radio to the bracket at the desired angle.
The microphone hanger should be mounted on a vertical surface in close proximity to the radio.
If the unit is to be mounted overhead, the control panel can be repositioned for proper viewing as follows:
1. Remove the two case screws at the rear of the radio and slide the chassis out from the case.
2. Remove the four screws securing the control panel to the radio chassis.
3. Reposition the control panel to an approximately 450 downward angle and secure it to the chassis in this position,
utilizing the screw holes on the chassis which align with the control panel screw holes in this position.
4. The radio case must now be inverted 1800 before sliding it back onto the radio chassis. Following this, secure the
case to the chassis.
ELECTRICAL
1. A power cord assembly for connection to a suitable 13.8 VDC (±20%) power source is included with the transceiver.
Connect the black lead to negative ground and the red lead to positive voltage.
2. Connect a suitable VHF antenna to the antenna jack at the rear of the transceiver.
3. If desired, connect an external speaker (4 ohm) to the external speaker jack at the rear of the radio.
INSTALLATION CHECK
After installation, the transceivers VSWR should be check with a thru-line wattmeter. It should be 1.5:1 or better.
Deviation and frequency should also be checked to insure optimum operation.
THEORY OF OPERATION
Refer to the functional block diagram (Figure 4) and the schematic diagrams in the Drawings section for the following
description.
7
