Got a Vibroverb RI in for a bad PT, among other things. I replaced it, and now it works, but someone has modded the bias circuit to run 51mA at 427v for 21.7 watts. That's just about 70% max. but seeing it is a bias wiggle circuit, current will swing up much higher than that, correct? Possibly being the cause of PT failure? It had the 33K R59 jumpered for -42v C-. The stock 33K R59 supplies -54v C- for 13mA at 450v = 5.8 watts. Seems more than a bit low. What is a good place to set these at? Or should I leave factory set good enough alone? It does sound good like this, what little I have strummed thru it.
http://www.prowessamplifiers.com/sch...face_2x10.html
http://www.prowessamplifiers.com/sch...face_2x10.html
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