Re: [TCML] My first coil, bigger sparks maybe??

[G Hunter <dogbrain_39560@xxxxxxxxx>]

Hi Daz,

--- On Sat, 7/11/09, Darryll f <darryll_forward@xxxxxxxxxxxxx> wrote:

> From: Darryll f <darryll_forward@xxxxxxxxxxxxx>
> Subject: [TCML] My first coil, bigger sparks maybe??
> To: tesla@xxxxxxxxxx
> Date: Saturday, July 11, 2009, 1:30 PM
> 
> Hi all, 
> 
>  
> 
> I have just finished off my first coil and after its second
> run and playing around with the spark gap, primary tap point
> and making a smaller top load I'm not all that impressed
> with the output. Maybe i have missed something?
>
This is a typical "first coil" story.  Don't be too disappointed.  I've just tested a new 4"x24" 1kW coil that barely puts out 24" streamers.  I'm not worried about it.  I'll tinker with the coupling, gap setting, and top load until I'm satisfied with the sparks.  Optimization is just part of the deal.

>  
> 
> My coil is powered by a 10kv 30ma (240v) nst running a
> static home made gap together with terry filter and separate
> safety gap, the mmc cap bank is rated at 13nf and 21kv, the
> primary is 11 turns of 8mm dia copper pipe and the secondary
> is 3.25" plastic pipe with approx 1100 turns or 19" of 26
> guage wire. All this is powered off a home brew control
> panel with 8 amp variac various kill switches, neon lights
> and gauges plus a line filter. 
> 
>  
> 
> After the first run with a break out point to earth i am
> getting about 10" sparks max, i have used various software
> and got 30" predicted sparks.

10" is a bit short for your 10kv/30ma input.  However, with patient adjustment, you will probably be about to coax longer sparks out of it.

> 
> I have not got the equipment to tune it so i'm going on the
> trial and error theory! I am thinking of looking at a rotary
> spark gap which might increase performance but i didn't know
> if there was anything else i can do in the meantime?
>

Neon transformers are too fragile for asynchronous rotary spark gap duty, and a synchronized rotary might be overkill for such a small coil. I suggest you experiment with static gaps until you find one that works well.
>  
> 
> Youtube vid of last run
> 
>  
> 
> http://www.youtube.com/watch?v=VNvpI72Sj28
> 
>  
> 
> Please be gentle this is my first coil and six months ago i
> didnt  know a thing about them!
> 
>  
> 
> Any advice appreciated
> 
>  
> 
> Daz
> 

Cheers,

Greg

http://myweb.cableone.net/grcarhunter/ 



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