ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

 

EZ math for PT requirement

4/11/2005 4:05 PM
BradEZ math for PT requirement
Is there some easy math on figuring what mA's one needs to support an amp? like when selecting a PT for a given amp.  
 
I know the EZ math for ballparking the B+ (Vac x 1.414= B+) but was wondering how one figures out how big a PT one needs.  
 
I'm talking about an average 3-12AX7, 2-6L6 topology or like a Marshall Plexi type thing. I know how to figure the heater amperage requirements.

 
Replies:
Mark Lavelle Use 1mA per 12AX7 (reality is usual... -- 4/11/2005 6:27 PM