[Amps] resistor b4 the HV filter-part 2

[Alek Petkovic]

At 05:52 PM 8/02/2010, Roger wrote:


>Jim Thomson wrote:
> >  . Here is the counterargument. First, there are two benefits of 
> the resistor; it
> >
> >> limits the inrush current when the HV supply is switched on, 
> since without it
> >> the  rectifiers would see a dead short from the uncharged capacitor. (Of
> >> course a step-start circuit in the xfmr primary is another way 
> of limiting the
> >> inrush current.)
> >>
>Some commercial amps are moving to Triacs and ramping the voltage up
>instead of a "step start" and I understand they are working quite well.
>
>73
>
>Roger (K8RI)

Yep. Emtron have been doing it for many years and it is superb.

Alek,
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