[Elecraft] Power Supply

[W3FPR - Don Wilhelm]

Stan,

If the voltages are ALWAYS exactly the same, you could be OK, but if the
voltage sags on either supply, the one with the higher voltage will try to
feed into the lower voltage supply just as if it were another load.  What
happens next depends on the exact power supply design.  I would surmise that
for one thing, connecting two supplies in parallel will possible defeat the
foldback current limiting.

It would be much better and safer IMHO to use 2 distribution boxes - unless
you have one piece of gear that requires more current than the Astron can
handle by itself.

If I were going to attempt to parallel 2 supplies, I would check that the
design (mainly the protection circuits) allows them to work together
properly and definitely would NOT attempt to parallel 2 different supplies.

73,
Don W3FPR


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Stan Rife
> Sent: Thursday, August 18, 2005 6:57 PM
> To: elecraft at mailman.qth.net
> Subject: RE: [Elecraft] Power Supply (WAS: New amp)
>
>
> 	That's what I have done here. I have a 20 amp VJ Products and a
> RS-35 Astron. I have them in parallel and fed in to a home brewed
> distribution box. I had often wondered if the difference in current rating
> would create any problem. Also, I have never checked to see if they both
> have exactly the same output voltage. Would either of the above
> present any
> problems?
>
>
> Stan Rife
> W5EWA
> Houston, TX
> K2 S/N 4216
>
>
>
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