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DXER Ham Radio DX News

The latest dx news/current propagation and more. Visit mike's Amateur Radio Page at

Saturday, July 29, 2017

Foundations of Amateur Radio -- #112:

It might surprise you to learn that some radios contain moving parts, even the solid- state one that's sitting in my shack. I installed a mechanical filter the other day and it turns out that the story on how this works is mind boggling if you've never come across Richard Adler and Zenith.

from Ham Radio Times

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