Greetings all, This is our P4XT Digital Multiplexing Transponder Project Program Proposal. It’s the result of multiple revisions and a lot of work. We recognize Wally Ritchie WU1Y for taking on the majority of the writing duties. He has crafted quality work from a wide variety of input, commentary, argument, and critique. He has clarified … Continue reading P4XT Digital Multiplexing Transponder Project Program Proposal