[RFI] New Astron Switching PS RFI?

[Kenneth G. Gordon]

On 18 May 2020 at 11:09, KD7JYK DM09 wrote:

> "Imo, linear power supplies are still the best....my Astron 
> RS-35m....Nuff said here about that."
> 
> Not quite...  Astrons, from the 90's onward, were notoriously bad...  I 
> have a pile of bad ones.  Not a few, about two dozen, from multiple 
> radio operators over the years, from their little 7A model to the 50A.  
> Bad caps, bad regulators, bad transformers, bad grounding, bad 
> rectifiers bad power switches, you name it.

Blown crowbars with attendant issues...

>  Random failures include 
> sudden over-voltage with failed protection circuits, sudden AC output, 
> sudden low voltage output, sudden low current output (proper voltage, 
> shuts down at a few mA), physically disintegrating transformers 
> resulting in humming/buzzing (loud enough to drive people from a 1,200 
> square foot room), metallic debris from mechanical transformer failure 
> (magnetic fields pulverized some), erratic operation due to electrical 
> grounds through the painted case and screws, missing/disconnected ground 
> wires, extreme heating issues, et cetera...  Astron was sending out tons 
> of free parts for them, for years, but so many, were so bad, with so 
> many issues, I gave up fixing them, and they were tired of hearing about 
> their own products.  Maybe they got their crap together, maybe not.  
> Their cases are nice, take the freebies, swap the guts.

I have had equally annoying results with them, Kurt.

> The question is, who makes a truly GOOD power supply nowadays?

You....and I.

Ken W7EKB