Quote:
Originally Posted by dieseljeep
Every 12" Zenith I've seen used a metal cone CRT! The 10" model used a 10BP4 glass tube.
It's been probably 50 years since I worked on one of those.
The Sams would probably show the top view of the chassis and the CRT.
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My model 2350RZ1 tube chart lists both 12UP4 and 12LP4. As found with an RCA 12LP4A. I'd expect many 12UP4 were converted to all glass at a later time.
https://c2.staticflickr.com/2/1925/3...78f638c1_b.jpg