Tuesday, October 20, 2026

Charlie ZL2CTM Talks Homebrew with NJ7V on Red Summit RF

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  https://www.youtube.com/watch?v=xV489xbf34I NJ7V has a good interview with famed NZ homebrewer Charlie Morris ZL2CTM.  Charlie describes h...
1 comment:
Monday, October 19, 2026

Using AI to Design Crystal Filters -- Please comment, especially on the use of AI

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  Earlier, AI told me that for 17 meters with a VFO in the 5.2 MHz range, and and a BFO/Carrier oscillator at 13 MHz I should not have any s...
10 comments:
Sunday, October 18, 2026

Waves? Particles? Understanding Quantum Mechanics with Jim Al-Khalili

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I recently pointed out that understanding has its limits:  We all USE quantum mechanics, for example, (like, now) but we do not really under...
Saturday, October 17, 2026

Wow! Jomon VU3IZD's Homebrew Modular BITX 40 Transceiver

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  I really liked Jomon's rig.  The modular approach is brilliant as is his explanation of how each stage works.   He emphasizes the bene...
8 comments:
Friday, October 16, 2026

Spies On The Air? Israel's Spy in Syria: Eli Cohen and HF CW in the 1960s -- Cohen's Antenna and Thermatron QRP Transmitter

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  Eli Cohen in 1959 This week I watched the Netflix show about the Israeli intelligence agent Eli Cohen:    https://www.netflix.com/title/80...
9 comments:
Thursday, October 15, 2026

Pittsburgh Plumber Builds Aluminium Telescope Dome in 1930

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AI generated image See:   https://www.alcircle.com/news/how-a-pittsburgh-plumbers-aluminium-dome-helped-shape-observatory-design-121565  
7 comments:
Tuesday, October 13, 2026

A Tale of Two Old Analog VFOs -- Artificial Intelligence's Role. PLEASE COMMENT!

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The Kenwood VFO under test, with 2 Yaesu VFOs Standing By  I have sung the praises of the VFOs taken out of the old Yaesu FT-101s.  I am usi...
18 comments:
Sunday, October 11, 2026

What Happens Inside an AI Chip When You Ask a Question. PLEASE COMMENT

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When I post something like this, there are several predictable responses:  1) Some guys will proclaim it to be "AI slop", and will...
6 comments:
Saturday, October 10, 2026

CuriousMarc and Company Fix an Old Analog Device (an Apollo Hand Controller)

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I really liked this repair video (above), not because I will ever fix an Apollo-era hand controller (I won't) but because it illustrates...
1 comment:
Thursday, October 8, 2026

Margaret Hamilton, Apollo Computer Programmer, has Died

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1 comment:
Wednesday, October 7, 2026

About the Guy Who Brought Us the AADE L/C Meter -- Neil W. Heckt

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  There it is.  The AADE L/C meter.  Many of us have been using these things for years.  I have two of them -- the one that I bought is here...
3 comments:
Tuesday, October 6, 2026

Some Useful Drake History from 15 years ago -- Thank you to Bob Crane W8SX

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I stumbled upon this report on an interview that Bob Crane W8SX did with Bill Frost back in 2011.  Bill had been Service Manager for Drake, ...
4 comments: