Re: Using dual 120V for 240?

To: tesla-at-pupman-dot-com
Subject: Re: Using dual 120V for 240?
From: "Choad" <choad69-at-geocities-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Mon, 05 Jul 1999 11:44:41 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

    I had thought about getting another 20A powerstat so I could do
240v. I figured that after you connect the 2 in series then you'd
take your output from both wipers. When both wipers were to the side
where they connect you should get 0v. You would have a 2v per turn
instead of a 1v per turn as is the normal configuration of a variac.
Only downfalls I can think of is that you'd need 2 identical
variacs. There is a 240v 10A on ebay at the moment.
http://cgi.ebay-dot-com/aw-cgi/eBayISAPI.dll?ViewItem&item=124523959

> Original Poster: "Coiler" <mycroft-at-access1-dot-net>
> I am curious.. is it possible to gang a pair of 120V variacs to
> control 240? I assume they would be wired in series, with the
center
> leg shared between, basically, one on each side of the neutral.
> Would this work? and if so, what are the gotchas?
> [I see lots of monster 120V variacs on E-bay, but no 240, so I am
> trying to be inventive here.]
> Michael Baumann
> Coiler, Homebrewer, Nerd. mycroft-at-access1-dot-net