Hi John:
Depends on what you mean by run for a long time.
The amp was playing music for about an hour. I then muted the pre-amp and let it settle while I was putting away the record I was playing and turning off the phono pre-amp, etc. I guess music wasn't playing for a few minutes - most likely less than 5 minutes.
Maybe, I just need to be more patient and let it settle with the pre-amp muted for a bit longer before I check the bias. I have done this many times and I have never seen this high bias voltage before. It is possible that I didn't wait as long as I should have.
I will try again but this time I will just power on the amp and let it warm up for 20 to 30 minutes before I check the bias.
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Digital W4S DAC-2v2SE, W4S Recovery powered by Uptone Audio LPS-1, OPPO BDP-105; Office: iFi micro iDAC2 Home Office: iFi nano iDSD with iPurifier2
Analog Rega Planar 2 (original) heavily modified; Benz Micro Ace; Aesthetix Rhea phono pre-amp
Pre-amp/amp Audio Research REF 5SE, Audio Research REF 150, Martin Logan SL3s, Shunyata Research power cords throughout
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