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SolderSmoke Daily News — Ham Radio Blog

SolderSmoke Daily News — Ham Radio Blog

Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com

Month: August 2025

Britain’s EF-50 Valve (Tube, Thermatron) in WWII

Thanks to Rogier PA1ZZ for sending us this. 

Author William MearaPosted on 12 August 2025Categories Uncategorised1 Comment on Britain’s EF-50 Valve (Tube, Thermatron) in WWII

Recent Posts

  • One (of several) SolderSmoke Blog Backups: This one in .pdf form
  • Britain’s EF-50 Valve (Tube, Thermatron) in WWII
  • A USB-powered Homebrew X-ray machine. And who is Project 326?
  • How many of you guys have changed the clutch on a Heathkit HW-101 (or similar rig)?
  • Oscillation! Negative Resistance! Barkhausen Explained Very Well!

Recent Comments

  1. Peter Marks on Britain’s EF-50 Valve (Tube, Thermatron) in WWII
  2. WN2A on Oscillation! Negative Resistance! Barkhausen Explained Very Well!
  3. Anonymous on Oscillation! Negative Resistance! Barkhausen Explained Very Well!
  4. WN2A on Oscillation! Negative Resistance! Barkhausen Explained Very Well!
  5. Anonymous on Homebrew Hero: Sir Douglas Hall
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