Quote:
Originally Posted by Jeffhs
The 18 does not refer to the number of tubes the set used; that number is, rather, the approximate size of the picture tube screen. Every Zenith television I have ever seen or owned has used this numbering system. If the set in question did have 18 tubes, however, it wouldn't be surprising to me as it probably did not use many (or any) multi-section receiving tubes, except in the RF tuner, which ordinarily used a 2-section tube as the converter/oscillator.
BTW: I had to leave my former lifelong home and my TV service area (the latter in the basement of the house) in 1999 to move into a very small apartment, my current residence, in a small town (long story and OT). I miss my shop and have very fond memories of it (probably not unlike VK member oldtvnut in Arizona), but I had no choice but to give it up due to circumstances (a death in my family) which forced me to leave my former lifelong home, forever and for good.
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Zenith changed their numbering system in about 1973, when they were building more solid state sets.
12A12C52, 12 tubes 14A9C52, 12 tubes 16Z8C52, 16 tubes. All I can think of now! There's many more.
