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.

Tuesday, August 29, 2023

Improving the thermal management of the RX-888 (Mk2)

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Figure 1: The RX888 showing the "top" and RF connectors.  While the heat sinks attached to the sides are visible, the large one on...
4 comments:
Monday, July 31, 2023

A solid state replacement for an old radio's "vibrator" (Wards Airline 62-345)

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Figure 1: The front of the Wards Airline 62-345 with its rather distinctive "telephone dial" tuning dial. It's powered up and ...
2 comments:
Wednesday, July 19, 2023

Modifying an "O2-Cool" battery fan to (also) run from 12 volts

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A blog posting about a fan?  Really? Why not! Figure 1: The modified fan on my cluttered workbench, running from 13 volts. The external DC i...
Friday, June 30, 2023

It *is* possible to have an RF-quiet home PV (solar) electric system!

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Figure 1:  Half of the array on my garage - the other half is on the west-facing aspect. There's a bit of shade in the morning around t...
Sunday, May 21, 2023

Characterizing spurious (Harmonic) responses of the SDRPlay RSP1a (and other models)

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The SDRPlay RSP2pro (left) and RSP1a receivers (right) The SDRPlay RSP1a is a popular Software Defined Radio (SDR) .  This device, connecte...
1 comment:
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