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Most TVs of early '50s vintage with phono inputs were set up to shut off the video circuits, even to the point of blanking the raster, when the record player was in use.
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Did they turn the heaters off along with the B+ to the TV only circuits? It'd be kind of a waste of power and tube life to leave them on. You'd need either a high current switch for the heater circuit or a separate heater transformer controlled by a lighter duty switch ganged with the TV/phono/radio function switch. If they did leave all the tube heaters running, you would have instant on of the TV once you were done playing records or the radio.....
04-30-2004, 07:20 PM
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