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In Reply to: RE: 300B Tube-life expectancy... SURVEY!!! posted by Tone! on November 29, 2007 at 23:41:19
Filaments still look fine. And of course still output sweet notes. In the late eighties, my then Conrad Johnson MV75A1 spit a quartet of 6550's out every six months, almost exactly to the day. Fugg dat.
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