It looks as though the amp has an effects loop with a switch. If you toggle the switch with tube installed does it have an effect on the p2/p7 readings?
V3 is the LTP phase splitter?They all seems to be within reason, except for the 25.5v on V3 pin 2 and pin 7 which I don't think is normal (should read 0 according to ceriatone voltage chart).
V3 is the LTP phase splitter?
If so, yes, your voltages are reasonable.
Dunno why Ceriatone suggest differently. It would be helpful to link to the documentation you’re referring to.
I expect the V2 DCCF pin7 and 8 voltages to be a lot closer to each other though. To have the grid with a forward bias of 50V to its cathode is wonky.
Not weird, totally normal.I still have those weird 25 volts on V3 pin2 and pin 7 though.
Not weird, totally normal.
But it’s not beneficial to try to measure those voltages, because the measurement error is enormous. The real voltage on the LTP grids will be a volt or 2 below the cathodes, ie the voltage at the node of the 1M grid leaks, the 470ohm cathode bias resistor, and the 10k upper tail resistor.
If the anode and cathode voltages are ok, then the grid voltages must be too.
Hence they’re left blank, ie don’t bother attempting to measure them.