I have an Astron SS-30 (no meters) switching supply. It’s RF silent; the fan
makes some noise but it’s quite tolerable.
I also have an old Astron RS-35 (no meters) linear supply. I tossed the Astron
regulator board that came with it (very prone to RF) and put in an “RF Proof”
regulator board from the 1988 ARRL Handbook. It’s built like a tank and is
still doing fine.
Kim N5OP
"People that make music together cannot be enemies, at least as long as the
music lasts." -- Paul Hindemith
> On May 18, 2020, at 12:37 PM, Gary Smith <wa6fgi@steeltrails.net> wrote:
>
> Imo, linear power supplies are still the best. Case in point, my Astron
> RS-35m has not missed a beat, it was the first purchase I made when I passed
> the technician(c) exam in 1968.
>
> To this day, it continues to power all of my 12 to 13.8v needs.
>
> Nuff said here about that.
>
> Gary...wa6fgi
>
>> On 5/17/2020 2:33 PM, Bob Turner wrote:
>> I had the SS-30 (no meters) in the '90s. No formal testing, just
>> observations. It was RF quiet, I mostly used it on VHF but at least once
>> on HF. It had a regulation problem if RF was in the shack, such as a nearby
>> 2m mag mount in a hotel room on a marginal ground plane. The RF/regulation
>> problem went away when I bolted my 2m rig bracket to the top of the PS case.
>>
>> The PS lasted about 15-20 years. There was no collateral damage to my rig
>> when it died.
>>
>> 7 3 Bob
>> N2SCJ
>>
>> -----Original Message-----
>> From: RFI [mailto:rfi-bounces+n2scj-lists=outlook.com@contesting.com] On
>> Behalf Of Tony
>> Sent: Sunday, May 17, 2020 5:00 PM
>> To: Rfi List <rfi@contesting.com>
>> Subject: [RFI] New Astron Switching PS RFI?
>>
>> All:
>>
>> Has anyone tested the latest Astron switching power supplies for noise?
>> I read a few reviews that said the new units produce no noise on HF.
>>
>> https://www.dxengineering.com/parts/asr-ss-30m
>>
>> Tony
>>
>>
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