Re: Using 240VAC on 140VAC Varic

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

Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com> 

Finn,

I feel like I should have thought of that, but thanks!
  The variacs are different brands and their physical
size seems to differ somewhat, but they are both 20
amp and 0-140 volt capable, so it should work.
Especially with short TC runs.  I guess I was
just stuck in the "box" of thinking about ganging two
identical variacs on one shaft.  Thanks again for
pointing this out!

-Brett  KI4DBK/AG
http://www.hot-streamer-dot-com/brett



--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: Finn Hammer <f-h-at-c.dk>
 >
 > Brett,
 >
 > I have 2 140 Volts variacs in my 240V power
 > controller.
 >
 >
http://home5.inet.tele.dk/f-hammer/tesla/ambassador/troller/troller.htm
 >
 > They are ganged, and you can do the same.
 >
 > It is not necessacary to actually join the motion of
 > the 2 variacs, you can
 > just turn them one by one.
 > Hook them up like this:
 >
 >
 > Please view in a fixed-width font such as
 >                   Courier.
 >
 >
 >
 >
 >
 >             +----------9 <----------------
 >             |          9            ^
 >             |          9            |
 >             |          9            |
 >             |          9            |
 >             |          9          0-280V
 >      -------)----------9            |
 >     ^       |          9            |
 >     |       |          9            |
 >     |       |                       v
 >     |       +----------9 <-----------------
 >    240V                9
 >     |                  9
 >     |                  9
 >     |                  9
 >     v                  9
 >     -------------------9
 >                        9
 >                        9
 > Cheers, Finn Hammer
 >
 >
 >
 > Tesla list wrote:
 > >Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com>
 > >Dan,
 > >I have two 20 amp 140VAC variacs now.  One General
 > >Radio non enclosed component variac, and one
 > enclosed
 > >generic brand with voltmeter, breaker and
 > recepticle.
 > >Although I would hate to ruin the GR I really will
 > >need a 240VAC variac in the somewhat near future as
 > I
 > >plan on testing a secondary wound on a 12 inch
 > >Sonotube former I have sitting in my lab.  It would
 > be
 > >nice to be able to run a 4 or 6 pack MOT stack of
 > 240
 > >with a variac that didn't weigh (or cost) as much
 > as
 > >the 240 variety.  I would definately be willing to
 > >give it a try, especially if others have done it in
 > >the past without smoking their windings.
 > >-Brett


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