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Questions about tubes and gear that glows. FAQ

RE: Oops!

Yes, a computer tube version of 12AU7. They had special cathode processing to avoid "cathode poisoning". In logic circuits, the tubes might spend a lot of time in a non-conducting cut-off situation. Apparently, that can cause emission loss pretty easily with typical cathodes.

I happen to like 5963 very much for audio, but I've never tried the RCA. I have some CBS and Sylvania that are very nice.


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