Re: First Light for 10" Coil.

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

Original poster: Ben Haylett <bhaylett-at-shaw.ca> 

Thanks for the info, Peter.

After seeing your pictures and system description, I am very tempted to try
to emulate your coil, or at the very least your power supply.

Did you use 6 identical MOTs in your power supply, or did you merely try to
match characteristics as much as possible? When using this configuration,
have you had any MOTs fail due to the higher than normal voltage? And
finally, when you are operating at around 240V, 40 amps, how long do you
figure that you can operate at one time without endangering your MOTs due to
overheat?

-Hope you're getting the info you need for fine tuning your
already-impressive system!

Ben


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, December 24, 2003 6:56 PM
Subject: RE: First Light for 10" Coil.


 > Original poster: "Peter Reid" <peter-at-reidconsulting-dot-com.au>
 >
 > Hi Ben,
 >
 > Thanks. My MOTs have all there primaries in parallel, and all the
 > secondarys in series.
 >
 > There is basically two sets of 3 MOT's running antiphase, such that the
 > middle two's cases are grounded. For the MOT's that are floating at
 > higher voltages I removed the high voltage (ground) wire from the
 > transformer core so the core could float and hopefully help improve the
 > hv insulation a tad. I have all the transformers in three plastic
 > containers, It allows for them to be easily transported and connected
 > with just banana plugs for the hv, and screw terminals for the mains.
 >
 > You can probably see on my web page how I have grounded one of the
 > boxes, with the green wire linking the two black terminals, then running
 > up to the safety gap etc.
 >
 > The output voltage of my Transformer bank is about 12,000V, with an
 > output current of about 1.6A (shorted).
 >
 > Regards
 >
 > Peter Reid
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Thursday, 25 December 2003 3:01 AM
 > To: tesla-at-pupman-dot-com
 > Subject: Re: First Light for 10" Coil.
 >
 > Original poster: Ben Haylett <bhaylett-at-shaw.ca>
 >
 > Congratulations on an impressive looking coil, Peter.
 >
 > How do you (and presumably Ted as well) have your 6 MOTs configured? In
 > other words, what sort of series/parallel arrangement are you using, and
 > what would the output voltage be?
 >
 > Ben
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Tuesday, December 23, 2003 10:46 PM
 > Subject: Re: First Light for 10" Coil.
 >
 >
 >   > Original poster: tesla <tesla-at-paradise-dot-net.nz>
 >   >
 >   > Greetings Peter
 >   >
 >   > A most interesting coil and quite similar to my own
 >   >
 >   > Very interested in the way you have done things
 >   >
 >   > The differences
 >   > Mine has 90nF of the 1600v 0.33uF caps (like Robin Copini)
 >   > SRSG is currently 300bps and all electrodes are near the 90deg and
 > 270deg
 >   > points. This needs fixing, How did you decide on the location for
 > your
 >   > rotating electrodes to set timing
 >   >
 >   > I use PFC of over 100uF and up to 6 MOT's. The MOTs I have are in oil
 > and
 >   > phased about ground. I use 900watt xfrmrs. I run fixed ballasting of
 > 22mHy.
 >   > I was intrigued by your ballast and would be interested in the short
 > form
 >   > specs on that.
 >   >
 >   > I have just purchased the bits to put a dedicated outlet at the house
 > so
 >   > should be able to run the thing flat out.
 >   >
 >   > My operating freq, toroids and so forth are pretty similar, I can
 > maker
 > the
 >   > beast do 2 metre O/P but I know it will do better when I get SRSG
 > timing
 >   > better and a dedicated mains. It will run > than 40amps if I let it
 > so
 > need
 >   > to keep it at that level or things start to go wrong, like fuses
 > start to
 >   > blow.
 >   >
 >   > Hope to hear more from your expts
 >   >
 >   > Rgds
 >   > Ted L in NZ
 >   > ----- Original Message -----
 >   > From: "Tesla list" <tesla-at-pupman-dot-com>
 >   > To: <tesla-at-pupman-dot-com>
 >   > Sent: Wednesday, December 24, 2003 8:54 AM
 >   > Subject: First Light for 10" Coil.
 >   >
 >   >
 >   >  > Original poster: "Peter Reid" <peter-at-reidconsulting-dot-com.au>
 >   >  >
 >   >  > Hello Everyone on the Tesla Coil Mailing List.
 >msnip.........