Thank you SO MUCH for going to all this trouble on my behalf, it is VERY
I promise you that I am making the correct and relevent AC/DC readings
I did check that 680 Ohm resistor and a few more from that batch and
can confirm that they DO read 680 ... not 68 !!
The meter is working correctly.
I've gone through both boards/schems/layouts with a finr tooth comb and
can find nothing "wrong" in the values/connections ....
As I said yesterday, I have the circuit almost "working" now, the gain/tone/volume controls behave normally and the circuit is producing a
healthy amount of level ...
It's just that the "cut off" and seemingly "rail to rail" stuttering continues
but can be "fixed" by a connection from the "power board" ground, to
MY SKIN ..... and whatever explination for resistance/ground that gives
seems to be the answer .
I realize that in comparison to your calculations for the voltage I should
have, it makes NO SENSE whatsoever ...! and I just dont have a reason
for that .
If I only had 1.9 volts at the tube, I'm presuming that I would not have
any "gain" nor a working "overdrive" circuit .. correct ?
I do now have approximately +12 and -12 volts where it needs to be and
I have 12.3 volts at pin 4 of the tube ref to pin 5/power board ground
I will try to connect the "grounds" again with some resistance, as this
seemed to solve Mark's problem, but so far, whenever I reconnect the
two boards ground rail, I loose all signal .. not even a "hum" remains !!
I know, its wierd and the more I think about it, the more it hurts my very tiny brain