Some back of the napkin math says the tube sections are drawing about 1ma and 1/2ma respectively.
Yeah, according to his schematic the two 12AX7s should be drawing a total of 3 mA. That's based on the cathode voltages and value of cathode resistors.
This is why I'm so puzzled - as I mentioned earlier, the schematic shows a 20v drop across a 56k resistor between the last two sections of the PS. That final cap supplies the phono section and the math would indicate that the total current drawn is only 0.357 mA (20 / 56000 = .000357 A) That's the total current for two 12AX7s, four tridode sections!
Does that make sense?? Is there a flaw in my calculations (wouldn't be the first time) or am I thinking about this wrong or what? If anyone could set me straight I'd appreciate it. That's why I suggested earlier that the correct value of R4 might be 5.6k, not 56k. That would indicate a total current of 3.57 mA, which jives with the rest of the schematic.
I replaced the 10k 2w R36, which did bring the 275v supply back up a little where it is more in line with the other voltages. I then replaced the 56k R4, and the 250v supply is now around 209v. So it's up a little from 195v but still not close to 250v. Should I try decreasing the value of the 56k dropping resistor to get this voltage up, or is something else going on?
First, the schematic you posted shows the last two supply voltages should be 270 (not 275) and 250. If you replaced R4 and it's now 56k, and if you're dropping 61v across it (270 - 209) then that would indicate a total current of just a hair over 1 mA for both the 12AX7s. So, again, this confuses me.
That's why I suggested that you measure all the parts connected to those two tubes. If you do that first, and make sure they are closely matched, you can eliminate them as a potential issue. You did this for the plate resistors but you haven't mentioned your measurements for the cathode resistors. Get the cathode resistors very closely matched to the schematic values and then see how the PS voltage is affected. If the voltage on the last cap is still way under spec, I would then try replacing R4 with a lower value resistor. (5.6K? I use a cheap resistor substitution box for such adjustments. It comes in very handy. Trying different values with clip leads works fine too.)
The extra noise I am getting is not just on phono but all inputs, so I don't really just want to go in and replace everything. However, the plate voltages are throwing me a little bit. Does this imbalance in the plate voltages for this phono tube tell me anything?
I must have misunderstood, I thought the noise was only in phono mode. That's why I suggested replacing all the parts in the phono stage. Again, the imbalance in the plate voltages could be caused by incorrect cathode resistor values. Eliminate that possibility first. Any imbalance after that would just be differences between the tube sections. Another tube might be better balanced. The tubes may have tested OK but could still be unbalanced in terms of current draw.
The schematic says 190v at the plates for V4, but I am only getting around 150v. This is again pretty low. What would a low plate voltage like this affect? The only other symptom I am noticing now when listening is that the right channel is a good bit stronger than the left channel. I have to turn the balance pot to about +3db to the left to center the soundstage.
Just measure all the parts on V4, just as you did on V1 and V2, and replace as necessary. As for the balance issue, that's why there is a balance pot. It might improve after you go through the tubes that are in front of it. As long as the imbalance is not extreme, just turn the pot to balance it out.
You should also test the 7199s on a tester and check their voltages just as you have with the 12AX7s.