Re: Cap/SG config

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi,

I have some data on this at:

http://hot-streamer-dot-com/TeslaCoils/MyPapers/primarycircuits/pricir.html
http://hot-streamer-dot-com/TeslaCoils/MyPapers/rcfilter/rcfilter.html
http://hot-streamer-dot-com/TeslaCoils/MyPapers/rlcfilter/rlcfilter.html

Conclusion: The experiment shows that when the transformer is placed across
the primary capacitor, it will experience very heavy current oscillations
and significant voltage oscillations. When the transformer is place across
the spark gap, the voltage simply drops to zero and there is a single
current spike, which also simply drops to zero. A transformer is placed at
great risk when it is connected across the primary capacitor. This supports
the common assumptions and observations.

Cheers,

	Terry


At 03:28 PM 5/25/2001 -0400, you wrote: 
>In a message dated 5/25/01 3:04:31 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
>writes: 
>
>
>
>
>Original poster: "Jason Petrou by way of Terry Fritz <twftesla-at-qwest-dot-net>" < 
>jasonp-at-btinternet-dot-com> 
>
>Putting the cap in paralell to the tranny is usually a bad idea - a badly 
>set SG will mean that all of the power from the caps will go back into the 
>xfmr. There are some other things aobut it too, but I cant remember right 
>now! 
>
>Jason 
>
>Hi Y'all 
>The other reason way it's hard on the tranny to have the cap across it is 
>this: 
>       With the cap across the tranny, when the gap first fires, the full rf 
>voltage is "seen and felt" by the tranny. Then it decays as the circuit 
>oscillates. With the gap across the tranny, when it fires, the tranny "sees" 
>low RF voltage until gap stops firing, since the gap is a low resistance 
>across the tranny. Then it only sees the remaining voltage on cap. (much 
>lower than in the first case). While some claim that their "supermacho" 
>trannies have stood up to the abuse and kept working, I figure "Why abuse it 
>if you don't have to?" 
>Hope this helps, 
>Matt D.
>