> Uh.... Did not know that!
>
> Curiously, How much does one of these 120 amp switchers cost and are
> they RF quiet?
::Like most modern switch mode power supplies in the 500W+ class,
they run about a dollar per Watt. I would say they are _very_ RF quiet,
since their primary applications are powering large telecommunications
systems which need to meet not only FCC Part 15 Class (B) but also Part 68
and a variety of other certification requirements. We use 'em all the time.
73 de Steve, WB2WIK/6
> Phil W2GE
>
> -----Original Message-----
> From: amps-admin@contesting.com [mailto:amps-admin@contesting.com] On
> Behalf Of Steve Katz
> Sent: Monday, April 01, 2002 6:10 PM
> To: 'Doc Johnson'; amps@contesting.com
> Subject: RE: [Amps] Re: 12V 120A Switching Power supply?
>
> There's been a great deal of speculation and advice on here regarding
> this,
> but in reality, a simple answer to the simple question has been
> provided.
> There are absolutely 12V, 120A "off the shelf" power supplies readily
> available and currently for sale. If someone wants one delivered
> tomorrow,
> he could have it.
>
> The MagneTek MG3 product is one I've used for a few years now, in
> exactly
> this category. Delivery is a few days or less, and it's a solid,
> certified
> product. Not large or heavy, and a twin MG3 pack provides 12V regulated
> at
> 200A continuously. There's a 48v version of the same product.
>
> Unipower, TDI, NMB, Todd and others make similar stuff. Nothing unusual
> about the requirement at all, although evidently the ham community seems
> to
> think so...
>
> WB2WIK/6
>
> "Each success only buys an admission ticket to a more difficult
> problem." --
> Henry Kissinger
>
> > -----Original Message-----
> > From: Doc Johnson [SMTP:bluescreen@comcast.net]
> > Sent: Monday, April 01, 2002 2:42 PM
> > To: amps@contesting.com
> > Subject: [Amps] Re: 12V 120A Switching Power supply?
> >
> > Why not build the amp out of 48 volt transistors? I have a dozen 300
> watt
> > 48 volt power transistors that I have been saving for such a project.
> This
> >
> > should reduce the current requirements and hopefully make the power
> supply
> >
> > lighter?
> >
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