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

Thu Dec 19 19:23:02 2002

Well, both.  The only way you would know it's doing anything is that the
needle moves when I key the Icom.  (When I key the K1 you gotta have a
mighty sharp eye to see the tiny shudder in the needle).

Just now I did press my ear right against the supply and I think I can hear
a faint hum in there, but you really gotta listen hard.  If I get my ear
more than about a half inch from the supply I can't hear anything.  Tried it
key-down, too, and it doesn't make any difference.

72/73 de WB8RCR    http://www.qsl.net/wb8rcr
didileydadidah     QRP-L #1446 Code Warriors #35

----- Original Message -----
From: "John McClain" <[email protected]>
To: "John J. McDonough" <[email protected]>; "'Elecraft'"
<[email protected]>
Cc: "Wallace, Andy" <[email protected]>
Sent: Thursday, December 19, 2002 5:56 PM
Subject: Re: [Elecraft] ASTRON RS-35 or SS-30 supply - OK for K2/100?

> It is interesting that you feel that your RS-35M is "dead quite".  I
> have owned two Astron supplies over the years and they both made an
> objectionable audible hum with or without a load.  The first one I had
> was rather small 10-12 amps and I don't recall the model number but
> the second one was an RS-35.  I ended up replacing it with an Alinco
> DM-340MV which I feel is "dead quite".
>
> John
> K7SVV
> [email protected]
> K1 #1378, K2 #2569, SST 20, Rock Mite 20, Rock Mite 40, Nor'Easter
>
> ----- Original Message -----
> From: "John J. McDonough" <[email protected]>
> To: "'Elecraft'" <[email protected]>
> Cc: "Wallace, Andy" <[email protected]>
> Sent: Thursday, December 19, 2002 2:18 PM
> Subject: Re: [Elecraft] ASTRON RS-35 or SS-30 supply - OK for K2/100?
>
>
> > 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" <[email protected]>
> > To: "'Elecraft'" <[email protected]>
> > 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
> > >
> > > _______________________________________________
> > > Elecraft mailing list: [email protected]
> > > You must be a list member to post to the list.
> > > Postings must be plain text (no HTML or attachments).
> > > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > > Elecraft Web Page: http://www.elecraft.com
> >
> > _______________________________________________
> > Elecraft mailing list: [email protected]
> > You must be a list member to post to the list.
> > Postings must be plain text (no HTML or attachments).
> > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > Elecraft Web Page: http://www.elecraft.com
>