Re: Another trial: Strange results again...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Simon, 
Just a couple comments below: 

Tesla list wrote: 
>
> Original poster: "Simon Yorkston by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <Quantum-X-at-Qserve.8m-dot-com> 
>
> Hi List. 
> I fired up the coil last night [finally managed to grab some dry-land and 
> some free time..]. 
> As per Terry's advice, my coil specs are pretty much the same as before, 
> but with the following changes: 
> Filter: now has 20 .0047ufd caps [not .047 :P] - 10 per leg, with 2x3k 11W 
> resistors per leg. 
> MMC now consists of 3x15of .047 caps. 
>
> It seems to run ok, but I'm still getting pretty poor results. 
> The maximum 'fat' sparks that I could get were about 25 cm from the toroid 
> to an earthed rod, and this wasn't consistant. It seemed that the coil was 
> 'inconsistant' with its tuning.. I could tap to one place, and then change 
> back to it later, and get different results from the first time. It think 
> this may have something to do with the way my toroid is attatched and 
> connected - the sparks were preferring to come off the wire connecting than 
> the toroid, unless 'forced' [eg, grounded rod put to opposite side] - Does 
> anyone have any simple, yet effective ways of attatching the toroid?



Sparks "will" come off the wire if the toroid is too high off the secondary
coil as well as corona which sounds to me is what your seeing in the paragraph
below. How high is your toroid (bottom plane of toroid to top most turn of
secondary?). When I run a wire to the toroid, I have never had a need to use
any special technique (at least not yet). I run the wire over the secondary end
cap near the center and up connecting to the toroid on the inner side and
center. If your getting corona (that purple glow), you may need to lower the
toroid a little to remedy the situation. 

Bart A. 

>
>   
> I did get a quick treat though - For a short time [5-10 seconds] I 
> witnessed the sparks 'sliding', and seeing the repeat images of the same 
> spark - very nice. 
>
> Around the fat sparks that I teased, there was a thick purple glow- about 
> 15cm tall.. I'm wondering if this is just a really quick breakrate, or 
> something.. 
>
> Well, I was really hoping someone could tell me what's wrong with my coil 
> :) 
> I have rebuilt everypart of the coil, at least one over, and everything 
> seems to checkout now... The only idea I have is the sparkgap- Could it be 
> breakingout to fast; but if I add more points, will it just make the 
> safeties fire? 
>
> Thanks, 
> Safe coiling.. 
> Simon