Re: MOT-powered coil questions

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

Original poster: "claude masetto by way of Terry Fritz <teslalist-at-qwest-dot-net>" <claudmas-at-optusnet-dot-com.au>

Hi Steve, I would still like to see that diagram. Would it be possible to
send it to me as an attachment. My e-mail address is
claudmas-at-optusnet-dot-com.au
Thanks
Claude.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, May 31, 2003 4:01 AM
Subject: Re: MOT-powered coil questions


 > Original poster: "Steve K by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<teslainnovations-at-yahoo-dot-com>
 >
 > Claude,
 >   I am not using a doubler on my MOT supply, it's AC
 > current. Sorry to have mislead you, I didn't read all
 > of this discussion...I can make you a diagram for the
 > 13kv, 4 MOT supply, (voltage boosted with microwave
 > caps, but not in a multiplier circuit), if you'd like
 > to see that.
 >
 > Steve Klec
 >
 > --- Tesla list <tesla-at-pupman-dot-com> wrote:
 >  > Original poster: "claude masetto by way of Terry
 >  > Fritz <teslalist-at-qwest-dot-net>"
 >  > <claudmas-at-optusnet-dot-com.au>
 >  >
 >  > Hi Steve, have you got a diagram of your D.C MOT
 >  > power supply and charging
 >  > choke.
 >  > Claude.
 >  > ----- Original Message -----
 >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Thursday, May 29, 2003 11:46 PM
 >  > Subject: Re: MOT-powered coil questions
 >  >
 >  >
 >  >  > Original poster: "Stephen Conner by way of Terry
 >  > Fritz
 >  > <teslalist-at-qwest-dot-net>" <steve-at-scopeboy-dot-com>
 >  >  >
 >  >  > At 19:12 28/05/03 -0600, you wrote:
 >  >  > >Original poster: "Gregory Hunter by way of Terry
 >  > Fritz
 >  >  > ><teslalist-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>
 >  >  > >
 >  >  > >Quenching a low voltage/high current arc
 >  > presents
 >  >  > >difficult design challenges that most newbies
 >  > would do
 >  >  > >better to avoid. Raising the voltage a bit with
 >  > a
 >  >  > >level shifter, or by simply using 4 MOTs instead
 >  > of 2,
 >  >  > >sidesteps many problems and greatly simplifies
 >  > spark
 >  >  > >gap design.
 >  >  >
 >  >  > I do tend to agree. A great way I've found of
 >  > using MOTs is to use a
 >  >  > voltage doubler circuit (a Greinacher doubler for
 >  > all you HV weenies) that
 >  >  > produces a filtered DC output. Two of these
 >  > doublers wired to a single MOT
 >  >  > will produce +/-5kV ie 10kV in total at around
 >  > 80mA. Of course being a DC
 >  >  > coil you need a charging choke and a rotary gap.
 >  > But the high voltage and
 >  >  > high inductance of the choke make quenching easy
 >  > so the spark gap design
 >  > is
 >  >  > a no-brainer. I used a vacuum cleaner motor and
 >  > brass screws for
 >  >  > electrodes. Also the choke is easy to make from
 >  > several off-the-shelf
 >  >  > chokes in series, and you don't need any other
 >  > kind of ballast. The
 >  >  > downside is that you need to collect lots of MO
 >  > caps and rectifiers, by
 >  >  > which time you would have got at least 4 MOTs
 >  > anyway |-6
 >  >  >
 >  >  > My fellow countryman Dave Gamble has a similar DC
 >  > coil but with two MOTs
 >  > in
 >  >  > series to produce a total of 20kV DC. His
 >  > charging chokes were made from a
 >  >  > couple more MOTs with the 'I' part of the core
 >  > sawn off. He gets up to 7'.
 >  >  >
 >  >  > Steve C.
 >  >  >
 >  >  >
 >  >  >
 >  >  >
 >  >
 >  >
 >
 >