Quote:
Originally Posted by nasadowsk
Philco’s 48-700, had a brute force supply. DuMont had a set that was magnetically deflected and had brute force supply, too. I think they had a retrofit kit for it that they sent out to owners.
I think a few Sylvanias had RF power supplies for the HV, and also, DuMont, being DuMont, had a set that derived the HV from an RF style supply that synchronized to the horizontal…
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Thanx much for the fascinating response to my post, the Philco is a very interesting set. Like to know more of the others.
Did Philco have a subsequent 7" electrostat model (50-702) with a troublesome oscillator EHT supply? It was Jim, an old friend that mentioned it to me. I mentioned adapting a salvaged Motorola electrostat EHT oscillator coil into it, but he wanted to solve the problem with the original, which at last commo, didn't happen.
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