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1
Operation (Continued)
Rear Panel
1. ANTENNA: This jack accepts a 50 ohms coaxial cable with a
PL-259 style plug.
2. CW KEY: The CW key is used for Morse Code operation. To
operate connect a CW key to this jack, and place the mode
switch in the CW position.
3. EXTERNAL SPEAKER: This jack accepts a 4 - 8 ohm 5W
external speaker. When an external speaker is connected to this
jack, the built-in speaker is disabled.
4. PA SP.: An 8 ohm, 4W PA speaker may be connected to this
jack for PA operation. This feature operates by placing mode
selector in PA position.
5. POWER: This socket accepts a 13.8 VDC power cable with
built-in fuse. The power cord provided with the radio consists of
a black wire (negative) and a red wire (positive ).
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Operation (Continued)
Microphone
1. PTT SWITCH: The Push-To-Talk (PTT) switch controls the
transmit and receive function of the radio. Push to transmit and
release to receive.
2. REMOTE UP/DOWN SWITCH: The digit on the frequency
display above the SHF “cursor” can be stepped up or down by
pushing either of these buttons.
For best results, the user should select a low-impedance dynamic
type microphone or a transistorized microphone.
The microphone should provide the functions shown in schematic
below.
6 WIRE MIC CABLE
Pin Number Mic Cable Lead
1 Audio Shield
2 Audio Lead
3 Transmit Control
4 Receive Control
5 Up Control
6 Down Control
Transceiver Microphone Schematic Diagram