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It would be interesting to see a transformerless color set of this vintage. With as many tubes as this set has, it would probably require a couple of tube strings. Personally I'm always happiest when a set has a transformer, usually a sign they weren't trying to cheap it out.
I've started going through the tubes, making a list. The horiz. out (6CB5A) and focus regulator (6BK4) are still Admiral tubes. They are stamped 'Made in USA for Admiral by RCA'. It makes sense that this would be some sort of RCA reference design. But what is missing is all the RCA patent info.
I found the schematic for the Sentinel set mentioned and have been checking the tubes against it. The horiz / HV section match, probably no surprise there. But I'm seeing differences in the signal tubes. I like the theory of the original owner working for Admiral. I know that Admiral was in Chicago. Given how expensive these were new, and the modest house this came from, some inside Admiral connection makes sense. I’m really beginning to think this set was a prototype.
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05-07-2009, 09:46 PM
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