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Vox AC30 RI (PCB)

12/19/2004 4:15 AM
Peter
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Vox AC30 RI (PCB)
hello,  
I fixed problem in Vox AC30 RI (on pcb).  
Amp was play when chassis was placed  
transformers downside, not playing  
when chassis placed transformers upside.  
In working position - transformers towards  
front of the baffleboard amp play with  
funny noises and lose volume - horror :-)  
Somebody else say to owner  
"bad power tubes"!  
Problem:  
Cathode resistors (2 x 100R/3W) are broken  
one leg each from pcb - it looks likes  
they were OK.  
Fix:  
Broke the cathodes connection to pcb,  
bolt to chassis 50R/25W resistor  
with cathode capacitor  
and connect to EL84 cathodes.  
 
If amp is under warranty - don't do it :-)  
 
cheers  
Peter