18-09-2021, 07:38 PM
Hi.
Indeed the series resistor works but of course wasteful and far from elegant.
Interestingly the Russian Rekord TV I have is for 220v, it uses electrolytic caps off the 110v tap as a doubler to give the HT, an odd arrangement indeed. If you use a power resistor to drop the 20v odd mains volts the transformer buzzes madly but using the variac or buck transformer it's fine with no such buzz.
Indeed the series resistor works but of course wasteful and far from elegant.
Interestingly the Russian Rekord TV I have is for 220v, it uses electrolytic caps off the 110v tap as a doubler to give the HT, an odd arrangement indeed. If you use a power resistor to drop the 20v odd mains volts the transformer buzzes madly but using the variac or buck transformer it's fine with no such buzz.
