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Re: copper static SG problems



Jan

Yes, must agree here - why are you using a resistive ballast when you have
an NST? There is no need and it will lower the system voltage somewhat. And
when you short the NST, the resistance is dropping quite a nuber of volts,
reducing the power input to the fan. Is the heater temporary? ie for tuning
'cos you don't have a variac - remove it and I pretty much guarantee the
problem will go away!

Alex

Tesla List wrote:

> Original Poster: "Jan Florian Wagner" <jwagner-at-cc.hut.fi>
>
> > > I've a strong cooling fan (25W) that blasts the gap.
> > Is 25 W correct?
>
> Yes, correct. It's from a microwave oven, and pretty efficient (in
> contrast to those PC cooler fans).
>
> But I still don't get it why it slows down when the NST is shorted.
>
> My setup is, from Triac&current limiting times:
>
> 220V mains
>   1.4kW heater
> ----/\/\/\----+------+----+
>               |      |    |
>              fan    PFC  NST
>               |      |    |
> --------------+------+----+
>
>