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Re: [TCML] Still stuck at 36"

Most of the blown or sucker gaps I've seen actually blow or suck through the electrodes:

http://www.classictesla.com/hot-streamer/adam/shopvac_gap.jpg

Though I don't have a photo, I currently have one that's bigger with all the fittings except for the tee made of copper pipe. I used it last Halloween on my 10" coil at well over 10 kVA, with no problems.

Adam


--- On Tue, 1/27/09, Neal Namowicz <neal@xxxxxxxxxxxxxxxx> wrote:

> From: Neal Namowicz <neal@xxxxxxxxxxxxxxxx>
> Subject: Re: [TCML] Still stuck at 36"
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Tuesday, January 27, 2009, 6:33 AM
> Hi Gary,
> Yeah, I guess size DOES matter, at least when it comes to
> electrodes. I used the heads of two carriage bolts, but they
> were much too small (less than 3/16th's of an inch) for
> the application. I used foil tape to close down the opening
> on the top of the pvc fitting to direct the air flow, but
> that still wasn't enough. I think the blower motor is
> probably undersized, too. I do have an old vac motor sitting
> around, waiting to be used, so I may give that a try, along
> with bigger electrodes. If the next ssg works better,
> I'll post a pic.
> 
> Neal.
> 
> 
> ----- Original Message ----- From: "Lau, Gary"
> <Gary.Lau@xxxxxx>
> To: "Tesla Coil Mailing List"
> <tesla@xxxxxxxxxx>
> Sent: Monday, January 26, 2009 7:49 AM
> Subject: RE: [TCML] Still stuck at 36"
> 
> 
> Hi Neal,
> 
> You mentioned that the performance diminished quickly with
> time, and was restored briefly after letting it cool down. 
> The electrodes in a single gap must be massive enough and
> the airflow sufficient that there is minimal heating of the
> electrodes.  Mine were never detectably warm.  Just what did
> you use for electrodes, and how focused was the airflow to
> where the arcing occurs?  A sucker gap pulls the air
> directly through the arc, and I think most have found it
> superior to multi-segment gaps.  Do you have any photos?
> 
> Regards, Gary Lau
> MA, USA
> 
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla


      
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