So I set both VR2 pots to around the middle and took it off the dim-bulb. With just straight 120v, no bulb, each VR2 pot ranges from 0-10 mv or so. Maxes out at 10. I have the positive probe on pin 7 and the negative on pin 19. Both boards are 100% plugged in. I am just using the regular preamp jumpers, not the 5.1k resistor that the manual calls for. I am adjusting the pot that's right by the top, which appears to be VR2 according to the manual. It does adjust the voltage, just not very much. With both VR2 pots set in the middle or so, this plays music fine through headphones. Any idea what I'm doing wrong?