Quote:
Originally Posted by wa2ise
First time I've seen a radio make use of the AM pentagrid converter 12BE6 tube as an FM IF stage. I figured that that would be possible, and sensible, to put that tube to work when the radio is in FM mode. Don't know why this wasn't done more often. You'd need a switch contact that disables the AM local oscillator. Just short the cathode portion of the osc coil.
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And then they skipped over V-4, which *could* have been used as an AM IF.
Do you know why they designate V-1 as first *and* second FM converter? It doesn't look like a dual conversion circuit.
jr
04-14-2016, 02:44 PM
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