NOTES:

If all your voltages are okay (within 10%) it's time to hook up a pair of speakers and check for noise.

SYMPTOM NOISE:

With the amplifier on, hookup a pair of speakers but leave the input jacks unhooked. Hear any hum? Shouldn't be able to unless you place your ear on the dustcap. You should hear nothing coming from your tweeters, just stone quiet. Turn the volume control up all the way and touch the shaft repeatedly as well as the input jacks. You should hear nothing. If you can cause any kind of noise at all by touching these, you have a ground problem. Check that the terminal strip inside the amplifier is perfectly grounded to the chassis. If this still won't correct the problem, solder a ground to the case of the input level control.

SYMPTOM ONLY ONE CHANNEL:

Check your soldering, make sure the input level control, and interconnect between that and the input tube socket are not grounding out anywhere.

Make sure the bias resistors on the input tube socket are not grounded out.

Make sure there is a signal to both channels.

SYMPTOM NO SOUND:

You probably forgot to install the 150 ohm 5 watt bias resistor on the output tubes, in which case all your voltages read very high.

SYMPTOM PLAYS TOO QUIET:

The 330K resistors on the terminal strip may be the wrong value, such as a 330 ohm (I did that once).

SYMPTOM SMOKED SOMETHING:

If you install a shorted tube the 100 ohm resistor between the plate and control grid (pins 7 and 9) on the output tubes will burn up and must be replaced.

Check to make sure the 1000 ohm bias bypass resistor from pin 3 on the output tubes to ground is not installed backwards.

FOR MORE IN DEPTH TROUBLE SHOOTING HELP YOU WILL HAVE TO CALL ME DIRECTLY at (309) 671 2428 9am 5pm M-F.

Happy listening :)

-Steve Deckert