Re: Please Explain This

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

Original poster: "EMMETT SECREST" <secrest2032-at-msn-dot-com> 

I decreased the primary turns by about one turn which increased the number 
and frequency of streamers from the toroid.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Please Explain This
>Date: Fri, 19 Dec 2003 07:44:38 -0700
>
>Original poster: Bart Anderson <classi6-at-classictesla-dot-com>
>
>Hi Emmett,
>
>Some coilers (myself included) run coils detuned in the range of 3% to 8%, 
>where the primary resonant frequency is slightly lower than the secondary 
>resonant frequency (detuned high on inductance). When you changed your 
>tuning, did you "add" an "extra" turn? This would be detuning the coil 
>high on inductance.
>
>The idea here is to offset spark loading (additional C) by adding a little 
>L. Also related, by tuning the primary low inductance (less turns), spark 
>loading may bring the system further out of tune and stress the secondary 
>causing similar results to having the toroid too high (voltage stress). At 
>least I've seen this on my coils.
>
>It should also be noted that the affects of spark loading may or may not 
>be noticed. I think much depends on how spark loading affects the 
>distributed capacitance of the secondary.
>
>Take care,
>Bart
>
>
>Tesla list wrote:
>
>>Original poster: "EMMETT SECREST" <secrest2032-at-msn-dot-com>
>>Being new to TC's there is a lot I have to learn so I could use some 
>>insight from you more experienced coilers.  I discovered something that I 
>>don't understand and would like to know the reasons for the results. I 
>>tuned  for maximum streamer length with a nail on the toroid for 
>>breakout. After I had determined what I thought was the best spot I 
>>removed the nail and was running the coil and enjoying the results.  I 
>>was getting intermittent streamers breaking out from the toroid. Then I 
>>decided to see what effect it would have to change the tuning.  I found 
>>that by changing the tuning by roughfly 1 turn I got almost constant 
>>streamers off the toroid.  Which position is the correct tuning spot? The 
>>one with a breakout point or the one without?
>>
>>Emmett
>>
>>_
>>
>>
>>