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In Reply to: RE: Defective 300B Tubes? posted by Devils Advocate on August 16, 2015 at 11:45:21
SETdude brings up a good point, is it safe to run the tubes @ 160mA, and what's the benefit of running them at the higher amperage?
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I would ask Cary about the bias point. That may be an issue with the particular 300B tube you are using.
I just looked at the manual for your amp. It's not tube rectified..no big deal. A bias setting of 160ma is what the manual says but that may exceed the limits of your particular tube. Look up the data sheet. The Hexfreds would be an upgrade. Capacitors? What you would prefer would likely hinge on your speakers.
Tube dealer recommends 120mA so that's what I've been using. Speakers are Merlin TSM.
That is 20ma more than the data sheet for the tube recommends.
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