Re: Disappointing Results

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>

The model T coil is just a car ignition coil after
all, and the output current is pretty tiny. I suggest
a much smaller tank cap, in the range of 1-5nF. Of
course, you'll need a small Tesla coil to go with that
little tank cap. You'll end up with something the size
of the Edmund Scientific coil, but still most
satisying.

Cheers,

Greg
http://hot-streamer-dot-com/greg

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "David Kyle by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <dave-at-kyleusa-dot-com>
> 
> 
> I fired up the desktop model T spark coil powered
> coil with very disappointing
> results. It appears that the pulse caps I am using
> simply short out the spark
> coil as I get no spark across my spark gap even when
> it is nearly closed. So
> here is the question: is it my choice of capacitor
> or have I selected too high
> a capacitance value for such a low power coil.
> 
>  
> 
> I know very little about the pulse caps I am using
> other than they are rated at
> .05uf at 10KVDC. I put 5 in series to yield a .01uf
> at 50KVDC. The cap does
> measure out at the correct value and does not have
> measurable resistance with a
> multi-meter. There is no question that when the cap
> is put across the coil it
> simply shorts it out.
> 
>  
> 
> The spark coil might be good for about one milliamp
> but I had not expected .01
> would short it out. What value might be more
> appropriate? Would a doorknob cap
> be a better solution for a very low power coil?
> 
>  
> 
> Dave
> 
>  
> 
> =========================================
> Dave Kyle
> Austin, TX USA
> Email: dave-at-kyleusa-dot-com
> 
>  
> 
> 
>