Re: Stealth Tesla Coil

Hi Terry,
           Thanks for doing that experiment. I'm glad to hear that I 
was wrong and that something can be done to improve gap operation. I 
am now keen to try it on my work coil. The single gap on this coil 
consists of 1/2" brass rods with W-C tips attached. Since the gap 
sits well clear of the mounting blocks I could easily slip a toroidal 
core over each rod. I'll try it and let you know how it goes.


> Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
> Hi All,
>     I finally was able to test my spark gap with the big ferrites beads I got
> from Digi-Key.  Much to my surprise, they actually do seem to have a
> significant effect on the high frequency gap noise.  They did not seem to
> do much for the ~40MHz signal, but the multi GHz signal seems like it was
> really attenuated!
>     I have no real good way to know how this actually affects RFI and TV
> interference since I really didn't have a problem before (cable TV and all
> that) but I think this could possibly be a big help.  Definitely worth
> looking into...
>     I posted a long JPG graphic file at:
>     www.peakpeak-dot-com/~terryf/tesla/misc/noise.jpg
> that shows the before and after scope pictures and the ferrites and gap
>     One indication that this may really make a difference is that I have
> always used the initial spike pulse to trigger my scope.  For the first
> time EVER, I had trouble getting the scope to sync with the ferrites in
>     I have contacted Richie off list about getting him some of these ferrite
> beads to try in his system...
> Cheers,
>     Terry