I'm still poking around my recently acquired 500-c trying to work through a few remaining issues.
Although I never really thought to pay too much attention to the 12AX7 heater voltage when I had changed out the rectifier in my other units, (some previous owner had already changed it out in this one), I felt it became economically necessary once I popped in a couple of 10M's in V-14 & 15.
I measured the voltage coming off the rectifier @ -25.9. I know there is some wiggle room here isn't that a little on the high side? The schematic calls for -22. If so, a) do I simply splice a resistor into the wire leading to the tubes? and, b) how do you calculate the value needed (mind you, I sat in the BACK of math class )
Thanks all in advance :thmbsp:
Although I never really thought to pay too much attention to the 12AX7 heater voltage when I had changed out the rectifier in my other units, (some previous owner had already changed it out in this one), I felt it became economically necessary once I popped in a couple of 10M's in V-14 & 15.
I measured the voltage coming off the rectifier @ -25.9. I know there is some wiggle room here isn't that a little on the high side? The schematic calls for -22. If so, a) do I simply splice a resistor into the wire leading to the tubes? and, b) how do you calculate the value needed (mind you, I sat in the BACK of math class )
Thanks all in advance :thmbsp: