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Ham Radio Workbench Podcast

This podcast is your bi-weekly deep dive on making, DIY, electronics, and technical topics of interest to the ham radio operator. Join your hosts George KJ6VU and Jeremy KF7IJZ as they discuss current developments in ham radio while introducing listeners to a plethora of topics and skills such as test equipment, 3D Printing, Arduino, Raspberry Pi, and more.

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  2. HRWB 256 - Tube Gear with Grayson Evans KJ7UM

HRWB 256 - Tube Gear with Grayson Evans KJ7UM

Feb 10, 2026

In this episode, Grayson Evans, KJ7UM, joins us again to talk about designing and building ham radio gear with tubes, or as he refers to them: thermatrons.  Grayson is the author of Hollow-State Design, a book all about tube-type radio equipment.  Grayson also provides basic tube radio kits.

Grayson is a great mentor and shares his love for all things thermatron !