Anyone know how to bias output tubes (using built in meter) on a Stereo Knight M-40 (Int. Amp)?

Google turns up ZERO info on Stereo Knight M40 Tube Amplifier.Are there any visible Bias Pot openings on the top plate near the power tubes?Are you sure the meter is for tube biasing?It seems to me if they provided a meter biasing pots should be easy to get to.If nothing is visible your going to have to open the bottom plate & have a look around.WARNING,there are capacitors inside that will store enough voltage to stop your heart in a,well heartbeat,ONLY DO THIS UNPLUGGED & AFTER A FEW HOURS SO CAPS CAN DRAIN.If you don’t like doing this  you’re going to have to take it to an ece.tech.

Thanks freediver for responding.  There are tweaks next to each tube (4), and there's a switch on the side to select 1 thru 4 (tubes, I'm assuming), it's currently setting on 4.  Then, there's a removable plate, next to the 1-4 switch, behind it has four RCA connectors, labeled 1-4. That's what I got.  The meter is definitely for biasing, it's inside the cage, and calibrated in mA, 0-100 mA.  So the switch surely connects the meter to each tube, but I don't know what to do with the RCAs.  I've measured them. with power off. Grounds are ground, and the plus lead reads 10.3 ohms.  Kinda sounds like a cathode biasing resistor? But who knows?  This is a ZERO feedback amp, and it sounds unbelievable.  It set new standards for me, and made most of my other amps crappy in comparison. Gotta keep it running!!! Let me know if you can help.

Maybe if you post a picture somewhere the amp could be identified 

Best of Luck


Peter