Hi again! I just wanted to follow up once more by saying thanks again for the info. I got the Sams today, and everything visible from the top, at least, including the tube types & functions, and placement, as well as the adjustment points, all match exactly right on - so I’m pretty sure I got the right thing.

(With one small exception – The picture I posted earlier shows V12, horiz. output, as a 12JN6 – but the Sams, while agreeing that it’s horiz. output, wants to say it’s a 12GE5. Any feedback on that minor discrepancy would be appreciated – i.e. are those tubes functionally identical/similar?)

One other bit of trivia I am particularly interested in researching further: As shown in the previous picture, V17 (UHF oscillator) is shown in the upper left corner as optional, with the filament string tied to ground prior to the UHF tuner if that tuner is "transistor type". As shown in the pic attached to this post, in this particular example it apparently IS transistor type, as no tubes are visible on the UHF tuner.

The Sams for this chassis agrees that the UHF tube-type tuner contains a 2DZ4, as shown in the earlier pic. But, it contains no reference at all to the transistorized version of the UHF tuner. I would be very interested to hear if anyone has more info on that, or can point me to a schematic of the alternate UHF tuner actually present here.

I’m especially curious to learn more about what point "hybrids" came into use, e.g. sets like this that were still based on their original tube design, but had just a single transistorized component "grafted" in. This concept seems especially interesting to me.

Thanks again for your feedback and assistance!

Attached Images

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