[Elecraft] ASTRON RS-20A

[Paul Clay]

Wow, Jim.  You found this to be true for the 
regulated, vice switching, supplies?

I have an Astron SS-10 that works well with my 2 
meter rig but that does seem to generate a fair 
amount of noise.  I have used it with the K2 
(with no KPA-100) and it works acceptably well, 
but the noise is somewhat discernable.  More 
troublesome,  is that while the supply is on, the 
noise picked up on my Icom R75 receiver (which 
isn't even plugged into my switcher) is pretty 
bad, being so bad that my Idom Press SCAF-1 audio 
filter (a great device by the way - right now I'm 
only using it with the Icom, but I want to plug 
it in to my K2 to see what I can do with both it 
and the K2's DSP module being available) is 
pretty much un-usable (the switching noise is 
LOUD).

So, as I prepare to buy and build a KPA100 to add 
to my K2, I've decided to forgo the small size 
and light weight of a switching PS to something 
that is as quiet as I can get.  Based on the eHam 
reviews (many reviews, all highly favorable), the 
Astron RS-20A seemed to be just the ticket.

- Paul, N6LQ

On Friday 05 December 2003 13:53, you wrote:
> Paul,
> 
> I'll be very frank about Astron power supplies:  
I would not use one on any 
> ham equipment of mine!  Just put one on a dummy 
load, like a car headlamp, 
> and then look at the ripple components on an 
O'scope.  The amount of ripple 
> on the Astrons that I have personally seen at 
about a 50% of rated capacity 
> load is terrible!