Re: DC power on Tesla secondary

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Peter Terren" <pterren@xxxxxxxxxxxx>

The HV caps would mean that the peak potential would be raised by 40 
kV and so add to spark length. Bearing in mind that my TC is 500kV 
with 8 foot sparks, this should be just noticable. Of course, primary 
to secondary insulation becomes more of an issue as well.  The cap 
will only properly discharge if a spark reaches the earth and then 
the spark should be brighter.
You can keep charging the cap with a HV supply (which has to have one 
end earthed) while the TC is running. The more rapidly it can be 
charged the more frequently it can discharge.  I guess it could be 
charged from the tank circuit via a diode, but this is only perhaps 
10 - 20 kV peak.  Of course, extend the primary out with double the 
turns and you double the voltage but this is taking power from the TC.
I was wrong about the cap being near the tank cap value.  It will 
only matter if it is close to the toroid (and distributed) capacitance.

Peter


> Original poster: FIFTYGUY@xxxxxxx
> In a message dated 8/12/05 1:53:42 PM Eastern Daylight Time, 
> tesla@xxxxxxxxxx writes:
> Just charging the caps to 40kV would have been a bit of a challenge
> as you can't use a conventional voltage multiplier as it needs to be
> earthed.  A flyback would do if a bit underpowered.
>
>     So would this setup fire one mean discharge at first light, and 
> for the rest of the run (or until the "booster caps" were charged 
> again) it would operate like a normal TC? How would one go about 
> charging these caps "on the fly"? Or did he just rectify off the 
> primary tank voltage?
>
> -Phil LaBudde