[Amps] How best to reduce filament voltage?

[Vic K2VCO]

Jim Tonne wrote:
> Tom wrote:
> 
>> This will not work. Don't do it.
> 
> in reply to
> 
>>> Install a resistor on the primary side of the transformer.
> 
> which is what I would have suggested.
> 
>> It will totally hose the voltage regulation under load,
> 
> The load is constant so "regulation" in the usual sense
> (same output voltage with varying load value) is not an
> issue.  A series resistance would limit inrush.  A series
> resistance at the transformer primary would limit inrush
> to the transformer as well.

Tom is assuming that everyone knows that the transformer in the SB1000 
is used for BOTH plate and filament supply.  The resistor would screw up 
the regulation of the plate voltage.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco