[SCCC] Quiet Power Supply Recommendation?

[Marty Woll]

Hi, Bruce.

For fixed service, the linear Astrons seem to do very well (my RS-35A is
going on 30 years old with no problems and no noise).  For our contest
expeditions, I and others on the team have been using the Astron SS-30 with
good success.  The only caution is that you must manually switch between
120vac and 240vac input; I forgot on the last trip, and . . . poof!  Good
thing I have spares.

73,

Marty N6VI

-----Original Message-----
From: SCCC [mailto:sccc-bounces at contesting.com] On Behalf Of Bruce Horn
Sent: Thursday, July 26, 2018 10:42 AM
To: SCCC Reflector
Subject: [SCCC] Quiet Power Supply Recommendation?

Hi,

I've been using an MFJ-4245MV as the 12V power source for my transceivers
for a number of years. This model's RF noise performance was judged as one
of the best in ARRL Lab tests. However, its fans are annoyingly loud. I'm
considering going back to using my Astron linear-regulated supply.

Does anyone have a recommendation for a switching power supply in the 30A
range that is both RF noise quiet and is audibly quiet? Thanks.

73 de Bruce, WA7BNM   (bhorn at hornucopia.com)
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