Re: Terry filter alternates?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>

Hi Gary,

That would explain why my resistors got so hot also.  I was running with the
12/120 and a .02uF cap.  The filter was 500pF and a 1K 50W wirewound on each
side of the cap.

David E Weiss

> Original poster: "Lau, Gary" <gary.lau@xxxxxx>
>
> Hi Ed:
>
> An R-C filter without the C's just isn't a filter and will do little to
> shunt HF transients. Also, a total of 6K in series with your NST will
> consume a lot of power.
>
> Since you are running a close-to-resonant sized cap with a sync RSG, I
> am concerned that your peak charging voltage may be hazardous.  I'm
> repeating my measurements below with my 15/60 NST and various cap sizes,
> and it shows how the bang voltage (BV),  increases with decreasing Cp.
> I was afraid to try below .02uF, but it's easy to extrapolate where your
> .015uF might fall.  Also, the voltages I recorded were the bang
> voltages, not the peak charging voltages, which were considerably
> higher.
>
> Perhaps your 6K of resistance helped current limit the charging and
> prevent destruction?
>
> Measured at 140VAC in:
> Cp BV W
> .02uF 24.4kV 714W
> .03uF 21.9kV 863W
> .04uF 19.6kV 922W
> .05uF 17.1kV 877W
>
> Regards, Gary
>