Quoting Ron Youvan <ka4inm@tampabay.rr.com>:
yes its on the pri input to the t/former ..heater /ht on same t/former
a slow fil input will save the tube life as we all, know when a ligh
globe is s/w on or off is when it fails..
>> I understand why turning a tube's filaments off and on repeatedly
>> shortens the tube's useful life. However, I'm not clear about the
>> effects of doing this when a step-start circuit is included (as in
>> the Harbaugh step-start kit, which I have installed in my
>> 6m-converted SB-220).
>
> I think of "step-start" as applying to the plate supply, to
> minimize the initial capacitor
> charging current and preventing a hV over shoot, and inrush limiting
> to be applied to initial
> filament heating, does the Harbaugh step-start kit effect both?
> --
> Ron KA4INM - The only real problem is death is so final.
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