Re: Tesla first start up problems. (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Mon, 11 Dec 2006 19:18:49 -0800
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Tesla first start up problems. (fwd)

I'm going to second Greg's statement here. As I was reading your post, I 
also did a bit of computing on the coil. I used your bottle capacitance 
against some that I built myself (be smart, get a meter and measure it). 
I really don't think your that far off resonance, or at least in the 
window of tuning with the primary. Depending on the actual toroid 
diameter and center height above the coil, you should be within 11 to 13 
turns. But if that cap is far off what I'm thinking, it could be further 
out there.

Power is not something always realized. You should stop now and check 
your NST and ensure it doesn't have a shorted secondary winding (common 
problem). This will cause half the output voltage and poor performance. 
Check each end of the NST by arcing it to a grounded source. Each end 
should arc at about the same gap. If one end appears dead or only arcs 
at a much smaller gap setting, the NST needs to be repaired or replaced.

Take care,
Bart



Tesla list wrote:

>Original poster: List moderator <mod1@xxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Sun, 10 Dec 2006 19:41:22 -0800 (PST)
>From: G Hunter <dogbrain_39560@xxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: Tesla first start up problems. (fwd)
>
>I think your coil is underpowered.  I think you are
>trying to charge too much cap and excite too much
>resonator with too little NST. Add another 15/30 NST
>in parallel, or else scale back to a smaller coil. 
>Should you elect to scale back, I would suggest a 4" x
>18" primary and a 6nF tank cap (approx 7 beer
>bottles).
>
>Bear in mind that I spent all of 30 seconds
>contemplating your problem.  You may wish to get a
>second opinion!
>
>Cheers,
>
>Greg
>http://hot-streamer.com/greg
>
>--- Tesla list <tesla@xxxxxxxxxx> wrote:
>
>  
>
>>Original poster: List moderator <mod1@xxxxxxxxxx>
>>
>>
>>
>>---------- Forwarded message ----------
>>Date: Sun, 10 Dec 2006 18:57:43 +0000
>>From: Trevor Keast <trevor_keast@xxxxxxxxxxx>
>>To: tesla@xxxxxxxxxx
>>Subject: Tesla first start up problems.
>>
>>Hi Guys,
>>
>>I am new to this mailing list but I was hoping that
>>someone might be able to 
>>help me out with some problems I am having with my
>>newly built tesla coil.
>>
>>A rough spec of my coil is as follows,
>>
>>15KV 30ma NST
>>14 turns on the primary, 1/4in copper tubing spaced
>>at 1/4in
>>6 inch diameter secondary, 24inches of windings,
>>approx. 900 turns.
>>4 inch topload made from aluminum tubing
>>Beer Bottle / salt water cap. 12 bottles, approx
>>0.1uF
>>
>>I checked and double checked everything and then
>>decided to run it outside 
>>at night.  The spark gap was sparking with a
>>considerable amount of power 
>>however that was all that was happening.
>>
>>I took the top load off at one point and left just
>>the end of the secondary 
>>winding sticking up.  When I did this the end of the
>>wire had a slight 
>>corona and about a 1/4 inch spark emitting from it.
>>
>>There were no coronas in the beer bottle cap even
>>though I didnt suppress it 
>>with oil yet.
>>
>>I tried tuning it and tried running it on about
>>every turn of the primary.  
>>It just seemed to be really lacking in power.
>>
>>Any advice would be most helpful.  I would love to
>>get this coil going!
>>
>>Kind regards,
>>
>>Trevor
>>
>>
>>    
>>
>_________________________________________________________________
>  
>
>>Be the first to hear what's new at MSN - sign up to
>>our free newsletters! 
>>http://www.msn.co.uk/newsletters
>>
>>
>>
>>
>>    
>>
>
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around 
>http://mail.yahoo.com 
>
>
>
>
>
>
>  
>