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In Reply to: RE: JJ Octal based tubes posted by tubular.well on April 24, 2014 at 23:46:10
That makes me wonder because I talked to Tomas at JJ a few times and he seems oblivious to the problems with the tubes. CE is the main distributor in the US for JJ tubes and it makes me wonder if they were buying rejects or factory seconds if that's possible? If you would have seen some of the JJ KT77s I got,the bottle was tilting about 10 degrees to one side and others flashed and ran hot.
Honest amplification is better than excessive 2nd order distortion anytime.
Follow Ups:
My experience with JJ's KT-77s was much like your Mike. I didn't note if they were leaning, so I can't be sure about that. I used the KT-777s in a small =35wpc PP integrated with 2 tubes per channel. After very few hours one arced and took out it's circuit which I had a pro repair. He asked what the F did you do?
OTOH I have had E34Ls blue glass that lasted for years no red plates, arcs, noises etc. etc. They just died with nary a wimper.. I dunno if they have better QC on the purely cosmetic blue tubes as that may be "true true and unrelated."
Steve
I recently tried the JJ 6CA7 and have had no issues. Perhaps the QC has improved?
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