[Elecraft] Nifty little power supply: Gamma Research HPS-1a

[peter gerba]

Any idea what the duty-cycle is on the fan?  I wonder how much noise it
makes when in full cool mode?

peter kn6bi

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Robert Tellefsen
Sent: Friday, April 20, 2007 8:27 AM
To: craig at powersmith.net; Elecraft at mailman.qth.net
Subject: Re: [Elecraft] Nifty little power supply: Gamma Research HPS-1a


Great, that's what I wanted to hear :-)
Thanks much, Craig.
73, Bob N6WG

----- Original Message -----
From: "Craig D. Smith" <craig at powersmith.net>
To: <Elecraft at mailman.qth.net>
Sent: Friday, April 20, 2007 8:11 AM
Subject: RE: [Elecraft] Nifty little power supply: Gamma Research HPS-1a


<> Do you know if it is a switching supply?

It is a switching supply, Bob, but with an unusual twist.  It includes an
ultra-capacitor to handle peak load currents.  That is how they can deliver
100W for intermittent duty cycle applications such as CW and SSB.  In steady
state applications such as RTTY it is probably good for perhaps 60 W output.
Output voltage is 13.8 V, which is of course ideal for ham gear.  Check
their web site for more detail.   I have heard absolutely no RF noise even
with it sitting right next to a rig.

73
      ... Craig   AC0DS




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