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?
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