H-250 Handset NSN 5965-00-043-3463 TM 11-5820-477-12 for the GRA-39 shows the Radio Set Control being used with the PRC-104 in a GRC-193A configuration, but it could be used to remotely control any version of the RT-1209(). Alice LC-2 Pack Components This PRC-104 was on a ...
Also a radio even though scrambled still sends out a signal that can be picked up and it's location determined and "traffic analysis" used to learn much without decoding the actual information being transmitted. There are also satellite based telephone circuits that use the UHF military frequencie...