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

[Bob Nielsen]

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