DIY: GBPPR Jamcat QRMaker

This is a simple add-on adapter for any Family Radio Service (FRS), amateur, or two-way radio transceiver with a microphone/Push-to-Talk (PTT) and external earphone/speaker interface.  It will turn the transceiver into a co-channel jammer.  That is, a jammer which can only jam a single frequency upon the detection of any “activity” on that particular frequency.  This type of…