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'Best' 6550?
I've got a pair of 6550 amplifiers that are in need of a replacement set of
output tubes. The current set of =C= 6550s (by way of Ned Carlson) have a couple of tubes falling off in emission causing balancing problems. What is the current opinion of the 'best' of what is in current production regarding AQ, robustness, etc? I am sure I will get a lot of differing opinions. Thanks, John P.S. These are in a pair of amplifiers lovingly hand-built over the winter of 1959-1960. The design is the Herbert Keroes Acrosound 60W Ultra-Linear Williamson (but with Dyna 431 transformers). Still going strong. |
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