Posted in Radio Hacks Tagged 4047, 80-m, amateur radio, ham, mosfet, smps, spy radio, switched mode, vacuum tube ← Rubber Tracked Bicycle Is Horribly Inefficient Hydroplaning Boat Skims Over ...

Loy Barton’s initial 500 watt KUOA 1924 transmitter design used a mixture of power sources: a motor-generator set for plate voltage, a battery for bias and a conventional AC step-down transformer to ...

T&D World discussed Tziouvaras’ experience at PG&E and how he got into power system protection (he actually built a tube radio power supply for his father in Greece), as well as the importance of ...

unknown maker Radio Instrument Co. Description (Brief) This is part of a Lowell & Dunmore batteryless receiver made at the Bureau of Standards. Square wood box with hinged lid, bakelite top-plate with ...

radio power supply American History Museum Object Details associated user unknown associated person Borsi, Peter maker Borsi, Peter Description (Brief) Typewritten schematic. "Power supply unit - for ...