[RadioSvit]

Michael, I like the idea of replacing the single half-cycle rectifier on the UY-11 radio tube with a semiconductor bridge rectifier and feeding the filaments of the radio tubes from the 110 volt network through a small ballast resistor. Since one radio lamp with a voltage of 60 volts will be missing, then only three radio lamps with a total voltage of 90 volts will remain, and you will have to choose a ballast to neutralize only 20 extra volts. It seems to me that this is the optimal solution to the problem. And the bridge semiconductor rectifier will raise the anode voltage to at least 200 volts, which will be enough for good radio operation