AL_LORONA@HP-USA-om33.om.hp.com wrote:
>
>
>
> Hi Folks,
>
> My "travelling" station is a 555 Scout with one of those new Astron
> switching power supplies. It's rated at 15A continuous, 18 A
> intermittent. Although switching supplies are notorious for EMI, the
> marketing hype faked me out and I bought one, since the spec sheet
> actually said "High efficiency switching technology specifically
> filtered for use with communications equipment, for all frequencies
> including HF." The word "HF" is boldfaced and underlined.
>
> Needless to say, the 80, 40, 30, and 20 meter bands are filled with S3
> to S9 broadband pulses every 60 kHz or so that drift as the supply
> heats up. The noise peaks on 40. I've kind of determined that it is a
> combination of radiation, induction, and conduction (on the power
> cable itself), but it is hard to tell (my scope is down at the
> moment).
>
> Question: Has anyone done any work to quiet these things down? Could
> anybody using the Ten Tec switcher with their Scout comment as to the
> quietness or noisiness of that particular power supply? Thanks very
> much.
>
>
> R,
>
> Al W6LX
>
> --
> FAQ on WWW: http://www.contesting.com/tentecfaq.htm
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Whoops, sorry .. you have the Astron power supply. I misread your
message. But the message I sent you from the supplier of the TenTec
switching supply should also apply to the Astron, and should work just
as well.
Sorry about the mixup.
Jim, K5ROV
--
James (Jim), Parsons, K5ROV USAF, Ret.
k5rov@worldnet.att.net QCWA, NWQRP, Fists, ARRL
EX: W1RLA, K5FBB, K4FEO, SV0WN (CRETE), SV0WN (RHODES),
DL4NC, DL4JP, KA2FC (JAPAN), KA2JP (JAPAN).
JOHN 3:16
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
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Administrative requests: tentec-REQUEST@contesting.com
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