[Milsurplus] remote control unit

[Ralph Cameron]

  BODY { font-family:Arial, Helvetica, sans-serif;font-size:12px; }I
have the schematic for a ,Remote Control Unit,KY-5004/GR. The diagram
number is 105161. The unit consists of a microphone input, code wheel
and manual method of keying and wonder what the unit controlled? 
 Thanks 
 Ralph, VE3BBM
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