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: anonymous I have the same amp on the bench, m... -- 8/4/2000 1:27 PM View Thread

Re: How to calculate bias?

8/8/2000 12:19 AM
Mike
email
Re: How to calculate bias?
If I want to lower the plate voltage would it work if I lowered the value of the 150k resistor (R66) and took the output after that resistor, just before the choke, leaving the 725v 'tap' open?  
 
http://www.ernieball.com/musicman/techinfo/amps/2475-130_&_2275-130.zip  
 
Trying to get somewhere around 450V on the plates instead of 725v's. Then I'd adjust the other PS resistors as needed.