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How to get KT90s tested
Can anyone advise how to test or get tested EI KT99 tubes/valves please?
Jadis when I returned my integrated for a power supply repair claimed they were faulty and sold me KT120s at €120 on the basis they wouldn't warrant the repair.
The KT99s were great and I'd like to confirm the Jadis diagnosis. I'm in Europe but they're light enough to ship anywhere.
Jadis when I returned my integrated for a power supply repair claimed they were faulty and sold me KT120s at €120 on the basis they wouldn't warrant the repair.
The KT99s were great and I'd like to confirm the Jadis diagnosis. I'm in Europe but they're light enough to ship anywhere.
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Thank you for replies. Jadis installed the KT120s after the power supply repair. I myself have doubts about the KT90 valves taking our the power supply hence the test request. (I say KT90 because I think KT99 are just selected KT90s but I may be wrong). A resistor broke and a PS wire melted its insulation with smoke was the fail mode when I turned it on. |
I would contact Jim McShane http://www.mcshanedesign.net/tubes.htm I say this because it was Jim that first told me about the Ei KT90's and would not sell me any of his. I know he knows a lot regarding those tubes. I did find several quads of them and to me they were my go to tube. I had an Octave V110 which ran a higher plate voltage for the KT120 and it could be switched for lower plate voltages to be used for 6550's KT88's even El34's. FWIW I liked the sound at the higher plate voltage. It is a very strong tube. That said I know nothing regarding Jadis but would think if you had a bad tube I would think it will take out a plate resistor and not the power supply. That said the Version 1 of KT90's had a real problem with the plate glowing red before burning out. The Version 2 was much better per Jim. Here is a link describing all 4 versions https://web.archive.org/web/20110426202420/http://www.manleylabs.com/galleria/KT90.html |