I've often wondered about series connecting switchers. Can the experts tell us
if there are any odd start-up conditions that might need attention?
I once made a +/- pair of supplies running from the same switcher source and
found I needed a parallel diode on the output of each to allow start-up.
David
G3UNA
>
> From: "Anthony Rick" <asrick@gmail.com>
> Date: 2008/04/09 Wed PM 09:21:29 BST
> To: "Oleg Skydan" <sov1178@rambler.ru>
> CC: amps@contesting.com
> Subject: Re: [Amps] Dual power supplies in EB104 4X MRF150 design
>
> Thanks for the replies.
>
> It appears that the series option may be the best logistically as far as I
> have investigated. I even wonder about pulling the boards from four PC
> power supplies that can be had for very little and placing them in a series
> configuration. This would provide 12, 24 and 48 VDC ouputs if needed.
>
> With so much of these computer/networking supplies available it is worth
> some ingenuity to find a way to utilize them.
> Anthony
>
> On Wed, Apr 9, 2008 at 11:52 AM, Oleg Skydan <sov1178@rambler.ru> wrote:
>
> > Hi, Rick!
> >
> > Try to look for the 24V/20A supplies and use two with series connection...
> >
> > Kind regards,
> > Oleg
> > 73 de UR3IQO
> >
> > ----- Original Message ----- From: "Anthony Rick" <asrick@gmail.com>
> > To: <amps@contesting.com>
> > Sent: Monday, April 07, 2008 7:34 PM
> > Subject: [Amps] Dual power supplies in EB104 4X MRF150 design
> >
> >
> > Hi all,
> > >
> > > I'm working on building a solid state amp based on the EB104 design, and
> > > cheaply. The only constraint that is causing problems is the power
> > > supply. It appears that a single 50V/20A is going to be pretty
> > > expensive
> > > while 48V/10A supplies are readily available as telecom surplus for
> > > pretty
> > > cheap. Looking at the EB104 schematic (
> > > http://www.communication-concepts.com/eb104.htm) it seems probable to
> > > power
> > > each MOSFET pair from a separate supply with only the need for an
> > > additional
> > > isolation capacitor.
> > >
> > > Unfortunately the supplies I am seeing, usually Lambda, are not designed
> > > for
> > > parallel operation so that easy alternative is not an option.
> > >
> > > Any thoughts?
> > >
> > > Thanks,
> > >
> > > Anthony
> > > NR9R
> > > _______________________________________________
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> > > Amps@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/amps
> > >
> >
> >
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