From the table given in Trader sheet 1270 for the Pilot PT650, I have worked out all the dropper values for both AC and DC for different mains voltages. (I should probably get out more
)
As Tony says, there is no difference in the heater dropper values between AC or DC mains. The HT is a different matter however.
210V AC=37, DC=11 Difference = 26
220V AC=48, DC=25 Difference = 23
230V AC=60, DC=48 Difference = 12
240V AC=73, DC=85 Difference = +12!!
The above values are in ohms and ignore the fractional values.
So at 210V, the DC resistance is 26 Ohms less than the AC value, but at 240V it is 12 Ohms more!!
Is that a Typo or is there something strange going on?
I am not sure what to make of all that!
Cheers
Nick