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For a Fender Deluxe Reverb, Out of a full set of Electro Harmonix tubes, just pulled out the last bad one. Out of 5 tubes, 2 12AT7's and 3 12AX7's, every single one was bad. The first shot, 2 extremely microphonic 12AX7's, since they were in the return period, AES sent replacements. The 12AT7 reverb driver blew out last week (probably less than 25 hours runtime), replaced that, then this week one side of the phase inverter dropped gain suddenly. Since they are now out of warranty, I had to replace 3 bad tubes out of pocket. Until Electro Harmonix fixes their quality problems, I would not recommend their 12AX7's or 12AT7's.
