Report Review for product Vacuum Tube - EL34, JJ Electronics

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I am disappointed in these tubes. I have had excellent results with other JJ tubes, but have had at least 4 tube failures of the EL34 tubes. All fail the same way - they get leaky, which reduces the bias, which causes them to red-plate and die. I had one that arced over (that I have seen - others may have, but didn't "catch them in the act"). Additionally, they all seem to fail out of warranty, in spite of the fact that they have not been used much at all. this is an unacceptable cost to us as a servicer - profit margins are slim enough.

I have much better luck with the JJ 6CA7. It's a much more substantial tube, drops right in (although the bias is slightly different), sounds a little more robust, and have not had the failures I have had with the EL34. I think JJ has to look at their processes on their EL34 production line.

andyorthernsound.com - August 11th, 2020