Re: MOTs and ballasting

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

Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Colin & company,

Your response below is just half the story.  Yes, MOTs have shunts for a
little bit of ballasting.  But MOTs rely on the about 1 mF capacitor in the
doubler to provide the rest of the current limiting.

If one only relies on MOT shunts for current limiting, the current most
likely will greatly exceed what the primary can safely handle without severe
overheating.  External ballast is usually required with MOTs.
--Steve Young

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, April 20, 2003 5:17 PM
Subject: Re: MOTs and ballasting


 > Original poster: "colin.heath4 by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>
 >
 > hi there,
 >              mots are ballasted just the same as nst's they use shunts.
 > they are not ballasted so low as nst,s but will stop at a set current
draw.
 > cheers
 > colin
 >
 >
 > ----- Original Message -----
 > From: Tesla list <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Sunday, April 20, 2003 2:25 AM
 > Subject: Re: MOTs and ballasting
 >
 >
 >  > Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > <Tesla729-at-cs-dot-com>
 >  >
 >  > In a message dated 4/19/03 8:18:51 AM Pacific Daylight Time,
 >  > tesla-at-pupman-dot-com writes:
 >  > >Just a thought,  MOTs themselves are current limited to some degree by
 > the
 >  > >shunts in them.  Do you suppose that we could run without a ballast,
and
 >  > >get whatever the MOTS will dish out (probably no more than 6kva)?
 >  >
 >  >
 >  > Hi Steve,
 >  >
 >  > You can run the MOTs unballasted externally but only if you submerge
them
 >  > in oil, otherwise they'll overheat and burn up fairly quickly. As you
 > said,
 >  > they
 >  > are somewhat internally ballasted theirselves but not like an NST or
OBIT.
 >  >
 >  > < Im looking forward to some 10-12 footers ;)
 >  >
 >  > < Steve Ward.
 >  >
 >  >  >From what others are claiming, you may be able to obtain that, though
 >  > I would personally opt for the "6 pack" MOT  (that's 6 MOT's in series)
 >  > if my spark length aspirations were that high.
 >  >
 >  > Sparking in Memphis,
 >  > David Rieben
 >  >
 >  >
 >  >
 >
 >
 >