[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Ganging Variacs (fwd)
---------- Forwarded message ----------
Date: Fri, 17 Aug 2007 03:16:54 -0700 (PDT)
From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Ganging Variacs (fwd)
If you get an old one, be sure and clean it out before
using. I think dust bunnies in mine helped contribute
to several flashovers between windings. I think
coiling is harder on a welder than welding; even with
filters, and a TVSS.
Adam
--- Tesla list <tesla@xxxxxxxxxx> wrote:
>
> ---------- Forwarded message ----------
> Date: Thu, 16 Aug 2007 20:53:22 -0600 (MDT)
> From: Chip Atkinson <chip@xxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Ganging Variacs (fwd)
>
> Man, I have to agree with Dave. You can get a
> decent arc welder on ebay.
> I use a lincoln AC-225. I have it wired in series
> and put a plug on the
> outside of the power cabinet. On top of it all I
> have an arc welder!
>
> My feeling is that why wreck either a good variac or
> a good welder when
> you can set things up so you can preserve both?
>
> The arc welders on ebay are around $100-200 and
> shipping seems to max out
> at $55.99.
>
> Looking on ebay, variacs are at least that.
>
> Chip
>
> On Thu, 16 Aug 2007, Tesla list wrote:
>
> >
> > ---------- Forwarded message ----------
> > Date: Fri, 17 Aug 2007 02:42:26 +0000
> > From: david baehr <dfb25@xxxxxxxxxxx>
> > To: tesla@xxxxxxxxxx
> > Subject: Re: Ganging Variacs (fwd)
> >
> >
> >
> >
> > Why waste a nice Variac ?,...get a cheap variable
> shunt arc welder and
> > be done with it,
> >
> >
> >
> >
> >
> >
> >
> >
>
________________________________________________________________________________
> >
> > From: "Tesla list" <tesla@xxxxxxxxxx>
> > To: tesla@xxxxxxxxxx
> > Subject: Re: Ganging Variacs (fwd)
> > Date: Thu, 16 Aug 2007 20:23:45 -0600 (MDT)
> > >
> > >---------- Forwarded message ----------
> > >Date: Thu, 16 Aug 2007 19:08:58 -0700
> > >From: Barton B. Anderson
> <bartb@xxxxxxxxxxxxxxxx>
> > >To: Tesla list <tesla@xxxxxxxxxx>
> > >Subject: Re: Ganging Variacs (fwd)
> > >
> > >Hi Terry, Tim,
> > >
> > >I did the same with my variac. I split the
> core to prevent
> > saturation.
> > >It's been a life saver for me since I only
> use a single
> > variac with my
> > >pig. But, if I had a large enough variac or
> two, I wouldn't
> > have done it
> > >(as it does ruin the variac for any other
> purpose). But if
> > it's solely a
> > >current limiting variac, cutting the core
> will help prevent
> > saturation
> > >issues, although I have smoked the brushes
> on this variac
> > from too much
> > >current. Even though saturation is
> prevented, current still
> > flows and
> > >the components that make up the variac can
> still be damaged
> > if high enough.
> > >
> > >BTW, remove the brushes at least once a
> year and inspect
> > them. Can
> > >prevent a bad situation. The smoked brushes
> occurred at my
> > 2005 4th of
> > >July party. Funny, I just turned the
> current down and the
> > smoke went
> > >away. The coil kept on Rockin! The next
> weekend I did the
> > optopsy and
> > >found I was running on about 1/3 brush
> surface. I learned
> > from that
> > >experience to inspect brushes and replace
> when worn.
> > >
> > >Take care,
> > >Bart
> > >
> > >Tesla list wrote:
> > >
> > > >---------- Forwarded message ----------
> > > >Date: Thu, 16 Aug 2007 12:46:40 -0500
> > > >From: Terry Oxandale <Toxandale@xxxxxxx>
> > > >To: Tesla list <tesla@xxxxxxxxxx>
> > > >Subject: RE: Ganging Variacs (fwd)
> > > >
> > > >There has been a great deal of discussion
> on this issue as
> > well as the
> > > >parallel aspect. My experience was
> saturation of the
> > variac core, but
> > > >this is based upon the core size and
> voltage/turns ratio.
> > I don't have
> > > >the greatest understanding of this issue,
> but I believe it
> > is focused on
> > > >the fact that only a small portion of the
> core is used in
> > most of these
> > > >applications (reduce the number of turns
> reduces which
> > increases
> > > >current, but also increases the
> voltage/turns ratio to a
> > point of
> > > >saturation.
> > > >
> > > >I successfully split the core of my
> variacs (two 1256
> > variacs in
> > > >parallel) to prevent this from happening
> and have been
> > very happy with
> > > >the modulated current profile as compared
> to the nearly
> > uncontrolled
> > > >profile previous to splitting the core.
> It was a lot of
> > work though.
> > > >
> > > >Terry
> > > >
> > > >-----Original Message-----
> > > >From: Tesla list
> [mailto:tesla@xxxxxxxxxx]
> > > >Sent: Thursday, August 16, 2007 7:12 AM
> > > >To: tesla@xxxxxxxxxx
> > > >Subject: Ganging Variacs (fwd)
> > > >
> > > >
> > > >---------- Forwarded message ----------
> > > >Date: Thu, 16 Aug 2007 07:48:34 -0400
> > > >From: timjroche@xxxxxxx
> > > >To: tesla@xxxxxxxxxx
> > > >Subject: Ganging Variacs
> > > >
> > > >I understand about using paralleling
> chokes when using
> > variacs for
> > > >voltage
> > > >control, what about for ganged series
> variacs for current
> > control or
> > > >in-other-words, adjustable ballast?
> > >
> >
>
>________________________________________________________________________
> > > >AOL now offers free email to everyone.
> Find out more
> > about what's free
> > > >from AOL at AOL.com.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
>
________________________________________________________________________________
> >
> > Learn.Laugh.Share. Reallivemoms is right place!
> >
> >
> >
>
>
>
>
____________________________________________________________________________________
Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games.
http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow