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In the Forum: Melquiades Amplifier
In the Thread: Full range Melquiades implementation
Post Subject: The Odds on TubesPosted by Paul S on: 11/25/2013
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decoud, as I have mentioned before, over the years I've always gotten about 25% bad ones of tubes from all sources, including those that were supposed to be hand picked, triple-tested, high-spec, precision-matched tubes that (of course) cost extra for all the assurances. I once had one each new driver and output tubes from a set that wound up bad at the same time in the same channel, and it took me some time to track down the problem, since it did not immediately occur to me that two new tubes could/would go bad at the same time that way. To top this, one of the two bad tubes was a new replacement for one of a "precision matched pair" I'd just exchanged because it had arrived DOA.
Best regards,
Paul SRerurn to Romy the Cat's Site