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:  

MK4 troubles...


 
6/30/2004 12:16 AM
Pef
email
MK4 troubles...
Hi, I have to repair a Mesa MK4..  
 
This one have too much crunch on the clean channel and I don't know why !!!  
On my scope I see an ugly signal, look like stair ont the sinusoide.  
 
 
Any idea ?  
 
( tubes are all news )  
 
 
 
Other little question, how to bias correctly this fu### amp ??? I place a trim-pot in place of the ground resistor but I don't realy know about simul-class... strange...
 
   Page 1 of 1