[Amps] How best to reduce filament voltage?

[Tom W8JI]

This will not work. Don't do it.

> Install a resistor on the primary side of the transformer. 
> Much
> lower current and the resistors will act as a
> soft start for the filament to damp the inrush when you 
> first turn on
> power.  Set the resistor value with the
> tube on and warm  There are many sliding tap resistors 
> available from
> the distributors or a fixed one will
> work as well. Ohms law calculation to determine the value.

It will totally hose the voltage regulation under load, and 
the resistors would have to be huge.

73 Tom