Re: I need a HV-transformer

["Finn Hammer" <f-hammer-at-post5.tele.dk> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Mike!

Nice to meet another scandinavian coiler on the list.

The 4000 kV trannies are probably not center tapped, so you could take
2, parallell the primary`s, and series the secondary`s with the center
tap grounded. 8kV is more than enough.

You could also use Oil Burner Ignition transformers, they are around
10-12 kV, 18-20mA, so a nice cluster of those in parallel would get you
far.

Both kinds of transformers are fragile, they don`t like to reach high
voltages too often, since they are designed to run into shorts.

I`ve had fine results with just 2 Micro wawe oven transformers,
primary`s in parallel, secondary`s in series. This gives only around 5
kV on the cap at dischargetime, still it is enough for around 60cm of
spark. And this is with only 18 caps in the MMC capacitor. This is the
kind if coil I have around to fire in the basement.

Of course you could antissipate the future, go Whole Hog, and wind your
own transformer, that will follow you to beyond 250 cm. sparks, as can
be seen at:
http://home5.inet.tele.dk/f-hammer/tesla/tesla.htm
Look at "homemade pig"

I can help you get the core, if you want to follow that route.

Cheers, Finn Hammer

Tesla list wrote:
> 
> Original poster: "Michael Petersson" <mike.petersson-at-swipnet.se>
> 
> Hi all!
> 
> I've recently discovered that where I live, (in Sweden) neon transformers
above
> 4000v are "impossible" to get. This discovery has stranded my planed tesla
> project because I need a transformer with an output of ~900W.
> 
> So if anybody out there can help, I would be more than grateful.
> 
> Please mail me at <mailto:mike.petersson-at-swipnet.se>mike.petersson-at-swipnet.se
> 
> --- Michael ---