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In Reply to: Tube warm up? posted by DAVID on February 22, 2000 at 21:56:41:
Three questions to pose to the coqnescenti (I'm still just coming to grips with this stuff);
1) What sort of output device is in the McCormack (JFET/MosFET, etc.)?2) How is the output device coupled (Single ended, Push-Pull, etc.)?
3) How is it biased (Class A, etc.)?
I have exactly the same experience you do, my amps get up to their bias voltage in about ten minutes... but sound best after idling an hour.
There are some VERY sharp inmates here, they should be able to point you toward some lit on the web.
Stumbling toward Nirvana, too
Matt
I just looked up the specs on the McC. and it uses bipolar output transistors driven by MOSFETs. It's classed in AB and I have no idea about the coupling. I actually never turn either my amp or tubed preamp off. The amp, even then, needs a good hour of playing in order to sound it's best but w/ the new tube preamp it much less noticable than it was when I was using a passive.
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