Quote:
Originally Posted by Ralph S
Thanks for commenting, Eric. Actually, the tube has no base. The pins come out like an octal version of a 12AU7, but with the same diameter as an octal tube. The tube is truly a triode: two pins for filament, one for grid, one for cathode. No plate, save for the HV (8.5 KV). It's a very simple thing! I don't think I've seen anything like it in American product.
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When I read the original post, I was thinking of that crazy Philco Neotron CRT, that was made only one model year. It had an end on it like a 12AU7, about the same diameter.
I don't remember of anyone rebuilding that CRT.
I also wonder how long Philco made replacements.