SII > 245V input voltage

[Tom-s]

Can I wire my SII for more than 245V input voltage? This is sometimes the case and with 235-245 settings my voltages are a bit higher than i'd like (especially with the EML 5% heater tolerance) I know i can separately change the heaters and high voltage; but this may be more convenient.

[Paul Joppa]

You can't; there only so many taps on the power transformer.

Wired for 235-245 just means it's wired for 240 volts nominal. Ten percent high is a traditional maximum deviation for tube gear, and perfectly safe in Stereomour for 90% of tubes. That would be at 264 volts.  (5% would be 252v. 245v is only 2%.)

If your average mains voltages differs from 240v by more than you are comfortable with, then it's time to adjust the filament dropping resistors. That's what they are there for!