Uploaded August 2025 | Updated September 2026, 2 weeks ago

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Mark takes on the challenge of building a fully functional FM superheterodyne radio without transistors or SDR, relying instead on vacuum tubes and a custom PCB design. After finding major flaws in a DIY kit, he scraps the schematic and creates his own design from scratch, covering everything from oscillator design and frequency mixing to tuning and final testing. Follow along as he assembles, debugs, and tunes the radio into a working stereo receiver. You can find the schematics on the e14 community: bit.ly/41snzXQ

Chapters:
#03:35 - The Schematic
#06:59 - The Assembly
#15:40 - The "Smoke" Test
#17:49 - Tuning Up

Visit the element14 Community for more great activities and free hardware:

Tech spotlights: bit.ly/3qPrDhM
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#VacuumTubeRadio #DIYFMReceiver #Superheterodyne