Re: spark gap question...

["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>

A typical MOT only develops about 2KVAC.  It can only
jump a very narrow gap, as in 2mm or so.  Once the gap
arcs, you can draw out an arc of several inches.  But
if you want it to self-start across a cold gap, you're
going to need to make the gap VERY narrow.

I've got some MOT foolishness on my web site.  Have a
look sometime.

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

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "brentonps by way of Terry Fritz
> <twftesla-at-qwest-dot-net>"
> <brentonps-at-optuset-dot-com.au.pupman-dot-com>
> 
>     The other night i finally got round to putting
> together some pieces for a
> relatively small TC however, i was unable to get the
> electricity to bridge the
> spark gap no matter how close the wires where (well,
> within a couple of mm at
> least). At first i thought that my transformer was
> shot or something had
> shorted so
> i placed a 33ohm resistor across the spark gap and
> turned it on. The
> resistor ended
> it's life in a blaze of glory and i saw a bright
> flash. So, i had considerable
> power but the initial spark wasen't happening. I
> know that my line  transformer
> (MOT) is giving out more than 3kv as my 3kv
> capacitors sorta..um...blew up
> (now i
> have a large black mark on the side of my casing).
>     Does anyone have any ideas as to why the gap
> wasn't being briged? It
> was a very
> dry night so i don't know if that would affect it at
> all.
>     After a while i did another resistor but left
> the power on for
> 20-30secs or so
> and a very large blue arc formed across my 2cm gap.
> I estimate my power
> output to
> be 4kv at about 500ma. My input to the MOT is 240v
> at about 11A. I have a
> overload
> protector that trips after about 10-20secs of usage.
> 
> 
> 


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