itnewsbot, Spy Transceiver Makes Two Tubes Do the Work of Five - Here at Hackaday, we love following along with projects as they progress. That’s e... - https://hackaday.com/2023/05/19/spy-transceiver-makes-two-tubes-do-the-work-of-five/ #continuouswave #transceiver #radiohacks #oscillator #vacuumtube #sidetone #spyradio #amateur #mixer #relay #ham #cw