Street -- The 435 volt B+ shown on my schematic is simply what my unit develops when operating straight from the line voltage here at my location, which is typically around 121 vac most of the time. If your unit is only producing 395 vdc at that point, then your line voltage may be lower, or you may have a current limiter installed, which my unit did not at the time. Also, it seems that some of the later units had power transformers that intentionally produced a slightly lower B+ level, as discussions between Larry and myself have noted.
Regarding the numbers you posted:
1. I'm not sure what the 390 volt point is that you posted, as it doesn't appear on any of my schematics, or my modified schematic of the power amplifier circuit.
2. The 355 volt point reading only 323 volts is consistent with the lower overall B+ from the power supply.
3. May I assume that you inverted the numbers for the 310 volt and 285 volt data? That you're intention was to state that the 310 volt point is indicating 285 volts? If so, that too would be entirely consistent with the lower overall B+ from the power supply.
Question: What is the voltage that the EFB board is supplying to the screen grid terminals of the output tubes (pins 1&7)?
Dave