Hackaday (unofficial) June 30, 2023 3:00am Spy Radio Setup Gets a Tiny Power Supply for Field Operations #radiohacks #4047 #80m #amateurradio #ham #mosfet #smps #spyradio #switchedmode #vacuumtube #hackaday posted by pod_feeder_v2 Spy Radio Setup Gets A Tiny Power Supply For Field Operations [Helge Fyske (LA6NCA)] may not be an actual spy — then again, he may be; if he’s good at it, we wouldn’t know — but he has built a couple of neat vacuum tube spy radios in t…