[Elecraft] Re:ASTRON RS-35 or SS-30 supply - OK for K2/100?

[George, W5YR]

I haven't done a thorough check, but the PS-125 I received with my new
IC-756 PRO2 appears to be silent both acoustically and electrically.
Slight fan noise only which I can't hear with the cans on.

After reading the dismal report on the PS-85 I was not thrilled by the
prospect of getting a PS-125, however "free", but it appears to be a
great little switcher.

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489  IC-765 #2349 IC-756 PRO  #2121 IC-756 PRO2 #03235

----- Original Message -----
From: "Bob Nielsen" <nielsen@oz.net>
To: <elecraft@mailman.qth.net>
Sent: Saturday, December 21, 2002 12:39 PM
Subject: Re: [Elecraft] Re:ASTRON RS-35 or SS-30 supply - OK for
K2/100?


> QST published reviews of several switching power supplies in January
> and September, 2000.  If you are a member, the are available from
the
> ARRL web site.  Most of the supplies have noise which increases
below
> 10 MHz, but the MFJ-4225MV, Kenwood PS-40 and Diamond GZV4000 appear
to
> have the least noise at the lower frequencies (measurements were
made
> from 1.5-100 MHz).  The Icom PS-85 appears to be the noisiest.
>
> I have the Alinco DM-330MV, which looked about the best at higher
> frequencies and have not noticed any noise on 160, but I am
> antenna-impaired on that band so have very little experience there.
> This supply has an adjustment where you can move the noise frequency
> around, but I have yet to see any effects.
>
> 73,
> Bob, N7XY
>
>
> On Fri, Dec 20, 2002 at 02:15:49PM -0500, WA9GQT@aol.com wrote:
> > I am currently using my Kenwood PS-30 linear power supply without
any noise
> > on 160 meters.  I am on the edge of maximum current draw for it at
16 A
> > continuous with the KPA100.  I am looking for a quiet switcher at
25 A.  Is
> > there any switcher power supply that is quiet on 160 meters?
> >
> > 73 & Seasons Greetings,
> >
> > Rod WA9GQT  K2 #1900 with KPA100