On Aug 13, 2014, at 7:13 PM, drlegendre . wrote:
Hmm.. but.. if both the HV (25K anode) & LV (2.5V
heater) secondaries share
the same primary, then where is the HOT in the circuit? There aren't many
xistors that will take 25K, so it's got to be on the low side, right?
The primary doesn't operate at 25kV....the anode secondary winding steps it up to that
voltage. The HOT operates at B+ which in this case is around 125V. It is TS467 in the
schematic.