Re: [TCML] Latest TC results, and one strange one....

[johnbrooks@xxxxxxxxxxx]

Is that AL the spark gap is mounted on?

Joe in Texas

On Mon, 23 Nov 2009 18:20 -0500, futuret@xxxxxxx wrote:
> 
> Peter,
> 
> ...and if you want to keep the toroid at its present height, you can add
> a smaller
> toroid below the bowl, right on top of the secondary to kill the corona
> at that
> point.  This smaller toroid will behave as a corona ring (anti-corona
> ring actually).  
> 
> Nice output spark action on your coil by the way.
> 
> This smaller toroid should be larger in diameter than the secondary coil
> like this:
> 
>    ___________
>   (___________)   -- toroid
>     |               |
>     |               |
>     |               |    --  secondary
>     |               |
> 
> 
> Cheers,
> John
> 
> 
> 
> -----Original Message-----
> From: Quarkster <quarkster@xxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Mon, Nov 23, 2009 4:05 pm
> Subject: Re: [TCML] Latest TC results, and one strange one....
> 
> 
> Peter - 
>  
> It looks like your "mystery spark" is just a streamer that happened to
> originate from some feature near the top of the secondary coilform,
> rather than from the toroid itself. 
>  
> If you watch the video clip carefully, you can see corona and multiple
> small streamers originating from this location. I can't clearly see the
> "inverted bowls", but is there a metal flange or a sharp edge of some
> sort at this location? 
>  
> I think there are two factors contributing to your "mystery streamer": 
> 1. There is a sharp edge or point near the top of your secondary that is
> causing a high field gradient; 
> 2. Your toroid is positioned too high above the top of the secondary, and
> is not providing adequate electrostatic shielding of the top of the
> secondary. 
>  
> Your pair of deep bowls may just be too tall for the toroid diameter you
> are using. It looks like the secondary may be 12" - 15" above the top of
> the secondary; you might want to reduce this to 6" - 8". 
>  
> Regards, 
> Herr Zapp 
> ----- Original Message ----- From: "Peter Baitz"
> <ussenterprisencc1701@xxxxxxxxxxxxxx> 
> To: <tesla@xxxxxxxxxx> 
> Sent: Monday, November 23, 2009 11:41 AM 
> Subject: [TCML] Latest TC results, and one strange one.... 
>  
> Two things - first is the latest results of my ever-modifying TC. Second
> thing is a mystery spark I'd ask you all to take a peak at and see what
> it could be? 
>  
> Firsy, here is the latest TC with an 18 inch toroid, fit nicely over an
> inverted metal deep bowl, and that on top of another/identical bowl, as
> seen here. Running at between 11.5 and 11.75 turns of the primary. Power
> supply is 12kV 60mA through terry filter, and secondary is a 4" x 18"
> with about 1020 turns of 25 awg. Vacuum quentioned copper tube gap with 4
> series by 2 parallel. Longest streamers are 30" sometimes 35" streamers. 
>  
> Videos: 
>  
> http://www.youtube.com/watch?v=b6CPOtC7EUU 
> http://www.youtube.com/watch?v=B_AxwH1nDcA 
>  
> Pics: 
>  
> http://i230.photobucket.com/albums/ee64/ncc1701_photos/tech/my_tc_snapshot_18inToroid_withvacuu.jpg 
>  
> http://i230.photobucket.com/albums/ee64/ncc1701_photos/tech/my_tc_4x2_gap_with_vacuum_01.jpg 
>  
> 
> _______________________________________________
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> Tesla@xxxxxxxxxx
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-- 
  
  johnbrooks@xxxxxxxxxxx

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