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This is one of the sets that uses a 6AG7 for audio output, right? That has always kind of intrigued me. 6AG7 is a prewar-era video amplifier that was utilized more in broadcast applications than in consumer sets. It also found use in some ham gear. But a Zenith TV set is the only place I've seen it used in place of a 6V6 or other ordinary power tube for audio output.
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