Oh, I definitely agree with that!
The first one I bought was quiet, so I went and got another one, and
BZZZZZT! all over the place. I haven't pulled the cover off (it's out of
warranty now) yet, but I might just move the LED supply to the output
with a suitable dropping resistor.
Jim
On 03/15/2011 08:34 PM, K9DUR wrote:
That is why I like the Alinco DM-330MV. Why should you have to modify a
brand-new piece of equipment& void the warranty in order to make it useable?
The Alinco's are clean out of the box.
73, Ray, K9DUR
http://l9dur.info
-----Original Message-----
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Robert Lathrop
Sent: Tuesday, March 15, 2011 3:08 PM
To: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Switching power supply recommendations for
Flex-3000
Hi All
I also have two Astron power supplies. The SS-30M generated hash as Steve
reported. I noticed the noise on the 10 and 6 meter bands. The noise is
generated by the method used to lite the meters. I removed the 3 or 4 turn
winding, cliped the diode and filter capacitor and the hash dissapeared. I
powered the meter lamps in series through a resister from the 12 line. The
lamp power supply is a half wave rectifer and the leads to the meters are
evidently a pretty good radiator. Running for about a year and a half with
no problems.
Search for Astron SS-30 mods and you will find enough to fill a book.
Bob W5ROE
----- Original Message -----
From: "Jim Jerzycke"<kq...@verizon.net>
To: "Steven L Hess"<sh...@bak.rr.com>
Cc:<FlexRadio@flex-radio.biz>
Sent: Monday, March 14, 2011 9:55 PM
Subject: Re: [Flexradio] Switching power supply recommendations for
Flex-3000
Hi, Steve
I have two of the Astron SS-30M units. One is very quiet, while the other
one generates enough RF hash to be extremely annoying. The noisy one is
one of the newer units with illuminated meters, and somewhere around here
I have a weblink that shows how to cure it.
I never knew it was that noisy until I fired up my 5000A with it one day
while I was rearranging the shack, and my RS-50M linear supply was
disconnected.
IIRC, the noise had something to do with where they tapped the supply for
the meter lights.
I never bothered to fix it, so that supply is used for my FT-847, which I
*only* use for satellite work.
QST has had some good reviews on the various switch-mode power supplies,
along with spectrum plots of their noise outputs.
I also have a huge, honkin' Diamond GZV6000 60 amp supply that's quiet
enough to use with the Flex, but I mostly use it for weak-signal stuff
with my TS-790 and some TE Systems amps.
73, Jim
On 03/15/2011 02:34 AM, Steven L Hess wrote:
Looking for recommendations for a switching power supply for my
Flex-3000, What works and what doesn't?
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