Name:    michael kaus
Email:   cnmkaus@charter.net  
Subject: mm 2-10 65 bias
Thread:  35
Time:    Mon, 24 Dec 2001 03:05:22 UTC

Am having trouble getting even bias readings on both tubes. Have tried to change bias feed resistors to balance output as I have over 4mA between the two tubes so one tube is running normally and the other is really cold, giving it almost a brittle sound. I have used 5 or 6 sets of tubes in differant brands and get the same result. I can't seem to alter the bias voltage at the pin 5 location. Anybody run into this? Feed voltage is exactly 34.5 volts to both tubes but I have the big gap in idle current. Mike.