Re: Glass loss question

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi Greg,

I'm aware of the good result you got with your SWC bank; I
visited your web site. I made the experiment with same value of
MMC and SWC in past it show longer and mostly brighter spark with
MMC. It could be part of dielectric loose in the specific glass I
use and probably part of resistance and may be electrochimic
reaction in salt water too. But I never hesitate to advise new
coiler to try it they are fun and easy to build, cheap too and I
think they are part of the learning.  

Tesla list wrote:
> 
> Original poster: "Gregory Hunter by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>
> 
> Hi Luc, All,
> 
> Saying "glass" is akin to saying "plastic"--these are
> both really broad categories, each containing
> thousands of different materials. Nobody claims that
> all plastics are excellent pulse cap dielectrics--we
> all know that some plastics are excellent, and some
> are lousy. Likewise, there are so many different
> formulas for glass, it is impossible to qualify a
> blanket statement to the effect that all glass is a
> lousy, lossy dielectric. The gent who gave his name to
> this list was well aware of this, and selected only a
> very particular brand of Champagne bottle for use in
> his own saltwater cap banks. He made pretty good
> sparks! I regularly pound my own beer bottle banks
> with 2-7KVA, and the bottles never warm above room
> temperature. No experienced list member would build an
> MMC out of Mylar film caps,

I build my first MMC 3 years ago with them for an OBIT I used 8
string of 25 * .016 uF 1.2 kV mylar caps. I give this coil to one
of my friend 2 years ago, the guy report using it around once a
week for 2 or 3 short run of 15 second the caps survived!!!!! We
only try short run, the MMC is well over build ( 200 caps ) and
because of that the heat is well distributed.

 but I suspect many of us
> are unwittingly doing something equally silly by using
> the wrong kind of glass for our SWCs.


But it's hard to tell which glass is better than an other without
complex experimentation.... And what is the loss in salt water too?
> 
> Best Regards,
> 
> Greg
> http://hot-streamer-dot-com/greg
Snip


Cheers.


Luc Benard