[ms660]

The AC anode supply voltages are nominally 1.4 times the DC anode voltage selected +- a tolerance, your voltages are within tolerance according to the manual:

80 volts DC =106.5 to 117.5 volts AC
100 vots DC = 133 to 147 volts AC
125 volts DC = 166 to 183 volts AC
150 volts DC = 199.5 to 220.5 volts AC
200 volts DC = 266 to 294 volts AC
250 volts DC = 332.5 to 367.5 volts AC

Anode and screen use the same transformer winding.

Lawrence.