Odd voltages

[FlyingZ]

The voltages in red were measured with the load and bias listed on the schematic.

The resistors check within tolerances, what else might cause the variation from the schematic?

Should I adjust the 12k-3w and the 33k to make it work?

[Enzo]

It doesn't work now?

Most old Fender schematics had a warning printed on them that voltages are approximate and may vary 20%. Your voltages are not off all that far. And mainly just B+4. If you apply Ohm's Law, I think the currents will appear pretty normal.

When you have 220k plate load resistors and less than a milliamp plate currents, it doesn;t take a lot of tube variation to cause a large voltage change.

[FlyingZ]

It works better then ever with the changes so far, however, I don't want to modify the power section until I know it's working properly. I normally bias at .3v (21w) bringing the 6l6 plates up even more so I was thinking of reducing the 12k 3w before discovering the discrepancies.

Do you mean determine the amperage across the plate resistors with I=E/R?

The specs for 12ax7 state Plate Current 9mA-.75mA and if I understand correctly both 6l6's 116mA with no input.

[Enzo]

No, I mean if there is a 220k plate resistor with 123v on one end and 260v on the other, how much current must be flowing in that resistor? And does that make sense? (In your case, a little under 1ma is not unusual at all for a 12AX7) And if there are three 12AX7 triodes drawing from B+4, does that seem to agree with the V drop across the B+4 resistor?

I see nothing wrong, so what do you see as a problem here?

[FlyingZ]

That's what I thought (.62mA) but I did not see the specs are for 250v plate so the min would change to .37mA at 123v (I assume)

True it is within 20% but 50v out of spec seems like a lot to a novice.