Re: [TCML] breakouts and a picture

[Simon Dodd <simon@xxxxxxxxxxxxxxxx>]

OK, here goes, In the video I didn't do any tuning but the second  
firing was at a festival and I did a bit of tuning which improved the  
spark length but still no breakouts.  I am using a 4" PVC tube with  
copper tube inside, the same as a lot of designs I have seen.  I used  
JAVATC to get my dimensions and my capacitor is an MMC type.

I noticed when I was tuning and getting small improvements The shock  
to my arm was increasing more than expected so I stopped using a non  
grounded rod very quickly!!

The picture is now at www.djodd.co.uk/tesla

Thanks

Simon
On 6 Aug 2009, at 00:40, Lau, Gary wrote:

> Hi Simon,
>
> The TCML does not permit attachments, so we didn't see the picture.
>
> The first question that must be answered in troubleshooting a coil  
> is, is the primary in tune with the secondary?  In your video, I  
> didn't hear any mention of tuning.  Have you tried tapping the  
> primary differently and determined if it improves or degrades  
> performance?  Did you use some type of design software to choose the  
> components?
>
> And there's any number of other issues that we can't deduce from  
> your video.  Details of the spark gap, and capacitor type.
>
> When you do get your coil running well, you probably shouldn't try  
> holding the metal rod in your hand and drawing sparks to it, unless  
> the rod is securely wired to a good ground.  You don't want that  
> current flowing through your body!
>
> Regards, Gary Lau
> MA, USA
>
>
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of Simon Dodd
> > Sent: Wednesday, August 05, 2009 5:04 AM
> > To: Tesla Coil Mailing List
> > Subject: [TCML] breakouts and a picture
> >
> > Hi Guys,
> >
> > Here is a picture of the second firing of my coil, I was getting
> > streamers to a grounded point about 10-15cm away.  However I would
> > like to get streamers leaving the torroid to the air rather than a
> > grounded point. Is this just a question of tuning or would a change  
> > in
> > torroid make a difference?
> >
> > The coil is a SGTC with an 8.5Kv 50mA NST. The secondary is about
> > 23" (I have the exact measurement written down somewhere!)
> >
> > You get an idea of the design from this photo and I also posted the
> > video of the first firing a while ago but here is the link again, it
> > has more closeups of the coil.
> >
> > http://www.youtube.com/watch?v=kdQ6IsJtUU0
> >
> > Let me know if you need more information to help me.
> >
> > Thanks in advance
> >
> >
> > Simon
>
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