• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

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jfitz57

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Joined 2010
Hi, First, I want to say that I did "use the search button" before posting this. I've recenty got some 29KQ6 tubes for a project. All are Westinghouse branded. Half of them are "29KQ6/PL521 Made in Japan". Those are the pretty ones. The other half are "29KQ6 U.S.A." and look like any old sweep tube. The "U.S.A." tubes all have "92-12" on them. Could that refer to "1992-December"? I thought they stopped making (most) tubes before then. Don't need to know, just curious.

Jim
 
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