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Didn't those Cherman sets use somethin' funky on detecting FM, something called "Slope Detection" ? So they wouldn't have to use Armstrong's patent, & could use a tube or 2 less ? Somewhere in my Feeble Little Mind, I THINK I remember reading/seeing something about this..But I AM Certificated Crazy, & HAVE Had a Stroke, so don't put too much stock into what I say..(grin)
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Benevolent Despot
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