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KB 381 5 valve AC/DC superhet
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14th Feb 2018, 5:29 pm
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ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Re: KB 381 5 valve AC/DC superhet
There's an article on mag page 2 in the link below about band pass coupling if that's any help with the basics (I realize that on yours it's from the top of the antenna coil):
http://www.americanradiohistory.com/...ld-1932-01.pdf
Lawrence.
ms660
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