[Milsurplus] Tube Question

[Tom Brent]

Can anyone tell me if there were later editions of *MIL-HDBK-213A*, "*Electron
Tubes, Interchangeability Directory*" published in November 1963?

I'm trying to find information on a *6204* octal base tube but it is not
included in this publication, surely the most extensive list of vacuum tube
types that I have ever come across. Types 6203 and 6205 are there and I
would have thought by the end of 1963 the procurement of new types of
receiving tubes, at least octal ones, would be coming to an end.

Does anyone have info on the 6204?

Happy tinkering everyone.

Tom
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