Home › Forums › Design and Building › Effects Design and Construction › Following 2 Power Tube Amp Design › Re: Re: Following 2 Power Tube Amp Design

March 11, 2011 at 8:01 am #5367
DeepBlue
Participant

So in the middle of some testing…the Plate voltage is like 280 on BOTH sides of the resistor! Could my resistors be bad? They both seem to read fine when i check resistance. I am going to verify that they are still showing that value. I also have 68K resistance from tip to far side of the 68K resistor on the way to pin 2. I also have no continuity when the jack is plugged, between tip and ground, which I believe is good! On to collect more numbers.

So would a high voltage on the 12ax7 cause no sound? Interesting also, when i connect my VOM to the preamp side of the 100K, my speaker has a low hum, but when i disconnect its completely silent again. I dont see a bad solder, but could a cold solder do this? And perhaps my VOM is fixing it temporarily when attached? Ahhh the joys and nightmare of trouble shooting!