Quote:
Originally Posted by DavGoodlin
That is a rare circuit, using a 12J5 for an oscillator.
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Why did they do that, vs just use a 12SA7 pentagrid converter? Can't imagine that that would offer any performance improvement of significance for an AM radio. Avoiding patent infringement? Or they just had a ton of 12SG7s and 12J5s to use up?
