[Amps] RE GI7B issues

Roland AH6RR Toesonnose at hawaii.rr.com
Tue Sep 9 21:08:29 EDT 2008


What is the plate idling current? I had one of them do the same thing but the idling current was way too high. Bias voltage should be between 25-32V after I set my bias voltage to 27V I have been using the same 2 tubes in my MLA-2500 for over 2 years now with 1.2 KW out. I used the stock fan and added a fan on top of the amp to draw the hot air out. My plate idling current is 100 mils at 2600V for 2 GI7B Check out the Bias Voltage if it is too high it will smoke the tube.


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