Re: Triggered gap proposal

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

Original poster: "brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Jeeze, more of that fine work. your always a foot ahead/er 2 feet ahead of
us! cul brian f.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, August 12, 2001 6:59 PM
Subject: Triggered gap proposal


> Original poster: "Finn Hammer by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<f-hammer-at-post5.tele.dk>
>
> Marc, Terry, All!
>
> I would like to propose a triggered gap, which is easy to build, that
> runs cool, while able to sustain the the strain associated with a coil
> producing 5 feet streamers at the least.
>
> First I would like to express my respect towards Metlicka Marc for
> sticking so inexhaustably to the idea of using triggered gaps.
>
> The gap that I am proposing is based upon an idea by Marc <Finnis, but
> realized without the use of tungsten electrodes.
>
> I have run the mentioned gap continously for more than 10 minutes
> continously, and it only gets luke warm.
>
> You can see it here:
>
> http://home5.inet.tele.dk/f-hammer/triggergap.jpg
>
> 349K
>
> It is really thrown together in a couple of hours, I was in need of a
> gap, without a lot of time to build it in.
>
> The parts can be bought locally, even scrounged if you have access to
> electronic scrap, the heatsinks are commom in solid state amplifiers of
> the 100W gender.
>
> I beleive that it is the massive electrode bars in solid copper,12.5" by
> 3/8 inch crossection, combined with the heatsinks, that produce the
> results: the thermal conductivity of the copper bars combined with the
> thermal mass of them insure, that the electrodes are kept cool from the
> instant they are under sparking condition, into continous operation,
> where the heatsinks support the thermal emmissive properties needed to
> keep the whole structure below 100 degrees centigrade.
>
> No fan is neded, but perhaps it is desired at higher power levels.
>
> The ignition coil has had the primary coil removed, and rewound after
> the secondary has been sufficiently insulated, so that the coil is tied
> to one end electrode and the center electrode. the triggered gap is able
> to hold the whole voltage of the coil psu off on its own, whereas the
> untriggered section is set to a distance which produces the voltage
> needed for the sparklength desired.
>
> Capping the electrodes with some tungsten would not hurt.
>
> Cheers, Finn Hammer
>
>
>
>