KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Thursday, May 31, 2018

A "floaty thingie" for keeping NiHM cells topped off

A charge-state maintenance device for NiMH cells PLEASE NOTE: Messing about with bat...

Tuesday, April 24, 2018

Pine needle what? (Keeping your coniferous antenna supports alive!)

The afflicted tree: The needles are more normal at the top, but looking rather "thin" farther down. Because of the number of ...

Tuesday, February 20, 2018

Better frequency stability for the QRP Labs "ProgRock" synthesizer

NOTE: The Progrock 2 from QRP-Labs has replaced the original ProgRock. This device has a 0.25ppm TCXO, eliminating the problems noted below...

Thursday, February 15, 2018

Managing HF signal dynamics and preventing overload with the RTL-SDR (and KiwiSDR) receivers

Note: This article was inadvertently posted for a few days before it had been finished. This is the "completed" version of that...

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