[R-390] Isolation Transformer

Wed, 22 Oct 2003 15:59:17 -0400

Some transformers are like that (selectable 120 or 240) and have a pair of
windings on the pri and sec so that you can wire them in series or parallel
as desired.

But the  6634 model specifically states "isolation step up/step down
transformer"  and "120/240 or 240/120" so I think that's what it really is.
Might be a good idea to shoot them an email first if you're interested in
that particular model.

John

----- Original Message ----- 
From: "Scott, Barry (Clyde B)" <[email protected]>
To: "R-390 reflector" <[email protected]>
Sent: Wednesday, October 22, 2003 3:38 PM
Subject: RE: [R-390] Isolation Transformer

> I thought 120/240 : 120/240 meant that I could select 120 or 240 on the
> input and either one for the output.  Is this incorrect?  In other words,
if
> I use 120 as the input, then am I forced to use 240 for the output and
> vice-versa?
>
> Thanks,
>
> Barry(III) - N4BUQ
>
> -----Original Message-----
> From: John KA1XC [mailto:[email protected]]
> Sent: Wednesday, October 22, 2003 2:29 PM
> To: R-390 reflector
> Subject: Re: [R-390] Isolation Transformer
>
>
> The first one looks like it would work well.
> For the second one you need 220 VAC for it to be useful as a 110 VAC
source
> but otherwise should be OK.
>
> Getting an oversize transformer is always desirable as they will run hot
if
> used at their full capacity for extended periods of time.
>
> John
>
> ----- Original Message ----- 
> From: "Scott, Barry (Clyde B)" <[email protected]>
> To: "R390 (E-mail)" <[email protected]>
> Sent: Wednesday, October 22, 2003 2:33 PM
> Subject: [R-390] Isolation Transformer
>
>
> > List,
> >
> > (Sorry about the previous message.  I'm not sure what I did, but it was
> sent
> > prematurely).
> >
> > I'm looking to buy an isolation transformer for various BA work and
found
> > these.
> >
> > http://www.surplussales.com/Transformers/IsolationXmers.html
> >
> > Particularly, I'm looking at these two items:
> >
> > (TP)64196-173022,  new - as removed from new, unused equipment.
> > (TP)6634  New in the box.
> >
> > Of these, does anyone have any recommendations for either?  I assume
> either
> > is overly sufficient to power a two or three R390s, but not sure about
> other
> > considerations.
> >
> > Any suggestions?
> >
> > Thanks,
> >
> > Barry(III) - N4BUQ
> > _______________________________________________
> > R-390 mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/r-390
> >
>
>
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