[RFI] New Astron Switching PS RFI?

[Kim Elmore]

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 at 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 at contesting.com] On Behalf Of Tony
>> Sent: Sunday, May 17, 2020 5:00 PM
>> To: Rfi List <rfi at 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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