Re: Terry filter alternates?

["Tesla list" <tesla@xxxxxxxxxx>]

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

Hi Ed,

They were running on a resonant sized primary system that could hit 7X the
voltage. (at least in sig gen tests)  A one minute run would get those
resistors hot enough to burn you.  Quite often I would get firing that would
jump around the outside of the rotory disk with a loud bang.  The full power
firing point was 1/2" below alignment for 1" total gap.  Finally, on a humid
night, it broke down the 10" of phenolic that seperated the filters outputs.
I don't think in actual operation I ever hit 7X as that should have blown
the 100KV Fair Radio caps, but I would guess it was in the 50KV area by the
way it would jump the rotory.  So those filters were working overtime just
to try to keep things safe.

David E Weiss

> Original poster: Ed Phillips <evp@xxxxxxxxxxx>
>
> "Hi Black Moon,
>
> I think you will roast those 10W resistors.  On my old 6" coil the 1K
> 50W
> resistors would get really hot at the 12/120 power level.
>
> David E Weiss"
>
> 0.12^2*1000 = 14.4 watts (IF I didn't slip a decimal point.)
>
> What was the real current in those resistors?  Can't be very far from
> sinusoidal with all of the leakage reactance.
>
> Ed
>
>
>