I was inquiring about QRO transformers in Uruguay, a short while back, and
someone on the reflector, sent me this very interesting URL about transformers,
that may be of interest...
http://ludens.cl/Electron/trafos/trafos.html
Best Regards,
73, de Pat Barthelow AA6EG
> Date: Thu, 20 May 2010 18:16:30 -0400
> From: sub1@rogerhalstead.com
> To: ToddRoberts2001@aol.com; Amps@contesting.com
> Subject: Re: [Amps] Transformer E-I lamination sources?
>
>
>
> On 5/20/2010 3:52 PM, ToddRoberts2001@aol.com wrote:
> > In a message dated 5/20/2010 12:41:18 P.M. Eastern Daylight Time,
> > sub1@rogerhalstead.com writes:
> >
> > I've been searching the Internet for suppliers of transformer E-I
> > laminations. I've found a few, but their web sites are difficult to
> > navigate and I never did find the specific laminations I wanted. That
> > and most of them are off shore industrial suppliers and I don't really
> > need a couple tons of the stuff.<:-))
> >
> > 73
> >
> > Roger (K8RI)
> >
> >
> > Hi,
> > What sizes you are looking for?
> >
> I'm looking for several sizes. Smaller ones (power transformers ~ 300 to
> 500 VA) that will require bobbins and larger ones (~ 3 to 4 KVA) that
> will get wound on a wooden form in a lathe before inserting the laminations.
> It's just something I want to try as I've never wound a transformer.
>
> I also have a couple I want to rewind, which I think it more difficult
> that straight winding with the separation and cleaning of the
> laminations followed by re-coating.
> I'd like to be able to build an amp and say I build everything except
> the tube. <:-))
>
> It's one of those things I may never get done but would like try.
>
> Thanks for the information.
>
> 73
>
> Roger (K8RI)
> > I assume you want to build a power transformer?
> >
> > I have had good dealings with Lamination Specialties Corp.
> > in Chicago, IL
> >
> > They are very friendly and will accept small orders but
> > they do have a minimum order size of 1/2 string which is
> > 660 sets of EI lams.
> >
> > I bought a half-string of EI-175 lams from them about a year
> > ago ( 45lbs worth ) + UPS Ground shipping for $177. The price
> > on steel changes all the time so they will give you a current
> > quote.
> >
> > You can reach them at :
> >
> > sales@laminationspecialties.com
> >
> > Also depending on what you want to build you may need some
> > Plastic Bobbins to fit, L-Brackets or Keeper Lams which I got
> > from RAM SALES CO.
> >
> > 73 Todd WD4NGG
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