9v is low. Are you running through a limiter?
Do you have a high frequency square wave on pin 5?
Do you have a high frequency square wave on pin 5?
I am pretty sure it was 10.9 Vdc before with Jfet installed. Are you referring to square wave on the 4080? Or ic2
Are you running through a limiter?
The jfet should not make a difference in the B+ supply voltage.
What's the B+ across the amp's B+ and ground?
Yes, pin 5 on the 4080.
The jfet should not make a difference in the B+ supply voltage.
What's the B+ across the amp's B+ and ground?
Yes, pin 5 on the 4080.