Would that be 28v AC @100 amps? Then use a voltage tripler to get to 119?
-------------- Original message --------------
From: "Phil Clements" <philc@texascellnet.com>
> I have a Collins 28 volt 100 amp power supply here in great condition.
> Someone make me an offer I can't refuse....
>
>
> (((73)))
> Phil, K5PC
>
>
> > -----Original Message-----
> > From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> > Behalf Of Michael Tope
> > Sent: Wednesday, January 31, 2007 12:15 AM
> > To: Tom W8JI; kg7hf@comcast.net; amps@contesting.com
> > Subject: Re: [Amps] power supply transformer
> >
> >
> > ----- Original Message -----
> > From: "Tom W8JI"
> >
> > >
> > > You should use a transformer for a few reasons (as was
> > > already covered) like line surges and safety. It is against
> > > code to EVER ground a neutral to anything connected to
> > > something external, so the neutral has to float. You could
> > > float the entire negative rail from chassis, but then the
> > > issue becomes spikes from the power line into the PA and
> > > harmonics from the rectifiers into the power mains. You
> > > certainly could design a system that would use the power
> > > mains safely and not break codes, but it would require some
> > > care.
> > >
> > > The real problem is knowing the ESR of the transformer.
> > > Certainly it isn't as low as it could be because of the fact
> > > it is a control transformer, but a choke input would help a
> > > lot. You could get a power factor close to unity rather than
> > > the very poor power factor of a capacitor supply, so you
> > > might be OK if the choke is a good one.
> > >
> > > 73 Tom
> > >
> >
> > Sounds like a good application for a switch-mode supply.
> >
> > Mike W4EF..............................
> >
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>
>
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