[Elecraft] ASTRON RS-35 or SS-30 supply - OK for K2/100?

[John J. McDonough]

Consider going even larger.

I bought an RS-35M about 5 years ago now.  It is a wonderful supply, and
being an old fogey, I am comforted by the huge transformers.  It has been a
beautiful thing, and it runs a bunch of rigs for me without breaking a
sweat.  And, of course, it's absolutely dead quiet.

BUT, every now and again I get the idea I'd like to try HSMS or some other
mode that needs a bit of power, and 25 amps isn't enough to cover the rig
plus some respectable amp.  The price differential to go to a larger supply
isn't all that great, but to get another supply doubles the price.

On the flip side, the RS-35 is amazingly heavy.  It could be a bit of a
problem just dragging something like an RS-70 into the house.

..

----- Original Message -----
From: "Wallace, Andy" <awallace@mc.com>
To: "'Elecraft'" <elecraft@mailman.qth.net>
Sent: Thursday, December 19, 2002 4:00 PM
Subject: [Elecraft] ASTRON RS-35 or SS-30 supply - OK for K2/100?


> For a future K2/100 purchase, I want to get a good supply
> which can handle the draw of the rig, and not make hash on
> the receiver - my antenna is awful and I will pick up noise
> near the rig with it.
>
> The KPA100 manual says I will probably need 15-20A.
>
> The RS-20 only does 16A continuous, 20A intermittent.
> The RS-35 does 25/35 which is probably more suitable.
>
> http://www.astroncorp.com/linear.shtml
>
> I'd like to hear from someone with an RS-35A or -35M (meters)
> and how they like it with their K2/100. Ham Radio Outlet
> has them. I definitely want something with overvoltage
> protection and current limiting, and the RS-35 fits the bill.
> Whether or not I need meters, I dunno...would be handy to
> see what is happening if something is acting strange, but
> given the sensitivity to magnetic fields, I'll probably have
> to have this linear supply a fair way away from the rig.
>
> The switching supplies are tempting. There's been lots of discussion
> and the ARRL review of the SS-30M switching supply:
> http://www.arrl.org/members-only/prodrev/bymfg.html#A
> gave it good marks. This also has overvoltage and current limiting,
> and handles 25/30A.
>
> Anyway, if someone has either of these two with their K2/100
> I'd like to hear about receive hash with them -- using a feedline
> or antenna which may pick up supply noise close to the rig.
> I have a randomwire fed with coax (for appearance) and the
> shield is doing darn little good.
>
> :-)
>
> -Andy
>
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