Showing posts with label Japan. Show all posts
Showing posts with label Japan. Show all posts
Saturday, October 31, 2026

More Clandestine Spy Radios -- Soviet Spies in Japan during WWII -- Spies On The Air! Please Comment!

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Sorge I may have been too quick to dismiss the possibility that Soviet spies built their own radios.  Maybe they did, but with a radio speci...
3 comments:
Tuesday, August 18, 2026

SolderSmoke Podcast 266: TROUBLESHOOTING! Test Gear, LA6NCA, ZIA Rig, Australia, Nuvistors, 75 AM, MAILBAG

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SolderSmoke Podcast # 266 is available.  Video version:  https://www.youtube.com/watch?v=_hbLmsFxzx4 Audio version:  http://soldersmoke.com/...
1 comment:
Tuesday, August 11, 2026

Chappy Happy Builds a 25 meter Direct Conversion Receiver using a PAL VFO -- And There Is Distortion of AM SW Broadcast

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First, it is a good day when I find a new Chappy Happy project on YouTube.  Thank you Chappy Happy! You make us happy!  Second, even before ...
2 comments:
Tuesday, July 28, 2026

Hidehiko JA9MAT's Self-Quenching Super-Regenerative Receiver from Japan -- AI Gets It Wrong!

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Updated image to show quenching Hidehiko reports that in Japan, this is called a "Self Quenching Circuit" and that it is popular w...
3 comments:
Saturday, July 25, 2026

Someone Else Used the FT-101 VFO Box -- JA9MAT in Japan

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Look at that!   The VFO from the venerable (1970s!) Yaesu FT-101 lives on, not only in Northern Virginia, but also in its country of origin,...
4 comments:
Thursday, July 23, 2026

A Homebrew Receiver from Hidehiko JA9MAT

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We recently complained that no SolderSmoke Direct Conversion receivers have been built in Japan.  So far, no Japanese SS DC Receivers have b...
2 comments:
Tuesday, July 7, 2026

Shuji Nakamura -- Inventor of Blue LEDs -- Takes on Fusion Energy at Age 72

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This blog covered Shuji Nakamura at least twice before -- we reported on on how he had invented the blue LED:  https://soldersmoke.blogspot....
1 comment: