10-08-2016, 09:48 AM
What Jeffrey said.
I don't have a schematic.
If no mains transformer then probably the DF/DL's etc heaters will be series connected, the valve manufactures suggested to under run them by 0.1 volts when using mains power (1.3 volts instead of 1.4 volts) If changing the rectifier to silicon then the surge limiter should be increased in value, this might alter the heater voltage supply, it might be prudent to monitor the heater supply voltage and current whilst bringing the mains up with a Variac when selecting a suitable surge limiter, selecting a new surge limiter for silicon diode is usually a suck it and see process as it's not easy to compute.
Can't remember using a capacitive dropper but seen one in a certain make and model of TV, the idea seemed to have been dropper for a diode dropper in their later chassis.
Good luck with it
I don't have a schematic.
If no mains transformer then probably the DF/DL's etc heaters will be series connected, the valve manufactures suggested to under run them by 0.1 volts when using mains power (1.3 volts instead of 1.4 volts) If changing the rectifier to silicon then the surge limiter should be increased in value, this might alter the heater voltage supply, it might be prudent to monitor the heater supply voltage and current whilst bringing the mains up with a Variac when selecting a suitable surge limiter, selecting a new surge limiter for silicon diode is usually a suck it and see process as it's not easy to compute.
Can't remember using a capacitive dropper but seen one in a certain make and model of TV, the idea seemed to have been dropper for a diode dropper in their later chassis.
Good luck with it
