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RE: 6SL7

Posted by Laudanum on April 12, 2017 at 10:57:06:
Yes, a Sylvania with the plate type in your link (the one on the right) is the type I purchased as a test. Don't have it yet to try.
Also interesting that the structure of the CBS Hytron that I have that is not microphonic is very much like the 6188 that you pictured. Of course, that could just be luck.
Thanks