ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

 
Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  
previous: Sean Kilback hi guys,Just wonder... -- 7/14/2000 3:18 AM View Thread

Re: biasing? oscillation?

7/14/2000 4:36 PM
dpcoyle
email
Re: biasing? oscillation?
What value resistor are you using to bias it?  
I'm not happy with an idle that is more than the rated plate dissapation. People seem to run the el84 pretty hard, but IMHO 80% of full tilt is a safer idle dissapation.  
As you describe, it leaves little headroom, although your poor breakup could be due to other things.  
Why not throw another 50 ohms in series with the cathode resistor and see if its better?  
Dan

 
Replies:
Sean Kilback hi Dan,I'm using th... -- 7/14/2000 4:42 PM