> At 03:48 PM 3/17/03 -0600, Phil Clements wrote:
> >One of the main issues is inrush current, Steve.
> >This is the reason most light bulbs fail upon turn-on.
> >If the filament transformer is designed properly for the tube(s)being
powered,
> >the inrush current is self-limiting to less than the tube manufacturer's
> >specs.,
> >and you have built-in protection and long tube life.
>
>
> I believe many old 3-500Zs are in SB-220s, which are designed to this
> standard. No?
>
>
> 73, Pete N4ZR
The original qst test of the sb 220 says current inrush is below tube
limits.
73,
Steve wd0ct
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