Ac voltage regulator

[timmy]

Originally Posted by Yamamaya42

There is no easy answer for this, since this is such a odd CRT, with a weird heater voltage, most likely made to be used with a wire wrapped around a FBT, for power, ac voltage regulator circuits are rather tricky and complex to get right, one mistake a FOOM, your heater is dead.
One thing you may try is a rather hefty adjustable power resistor hooked to a 6v filament transformer and adjust the wiper up till you got the needed voltage, tricky bit will be choosing the value of the resistor.

I already used a resistor with a 6.3v filament transformer but the transformer got extremely hot and I did get the .55v right on but the transformer won’t last.