How to bias a tube amp with a Multimeter


I’ve had this Shuguang s8mk integrated sitting in storage for 6 years. I bought a multimeter to bias it. The meter is set up to mV. 
 

I’m getting zero read results. The amp has been warmed up for 90 minutes. 
 

It’s got a funky bias panel. 
 

What am I doing wrong?

 

 

 

coltrane1

Showing 1 response by imhififan

Measure the resistance at test points + and - with the amplifier powered off. If you cannot get any resistance readings, you cannot bias the output tubes.

If this is the case, the problem may be a bad meter probe or the amplifier test point is not connected to the cathode resistor.