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I hate to sidetrack this thread, but it's already been derailed. Craig, So you had Marshall Leach as a professor? Nice. How does his amp sound to some others? My amp's the symmetrical Mosfet-output one by Anthony Holton (he's from the University of Tasmania, I think). Power and heat are...

Craig, Very impressive looking! What kind of amp is it? The thermistor is a Keystone CL-60 from Digikey (what Pass uses) and it's just wired in series with the transformer primary. I occasionally hear some hum from the transformer when it turns on, but there's no dimming of the lights or...

Allan, Yeah, be careful with the caps. The +/- 75V at 23,400uf I have isn't very safe, but I put 4.7kohm power resistors across the rails to slowly drain power when it's off. (Also, after I unplug it I play music until it distorts, to drain the power supply.) I use a thermistor wired to the...