[Elecraft] Which PS for K2/100, linear or switcher?

[Rick Dettinger]

Craig - I had that supply.  On 80 M I could hear hash every 25khz or so.
There was a knob to alter the switching supply frequency.  It worked but was
something else to keep in mind while operating.  When I am pounding brass
with someone, I like my rig to be as transparent as possible.  Thats why I
like simple analog rigs that are intuitive to operate.  I currently use a
30AH marine gel cell to power my QRP rigs , thru a rig runner.    Rick -
K7MW
----- Original Message -----
From: "Craig Rairdin" <craigr at laridian.com>
To: <Elecraft at mailman.qth.net>
Sent: Monday, February 27, 2006 8:56 AM
Subject: RE: [Elecraft] Which PS for K2/100, linear or switcher?


> The advantages of the switchers are:  physically lighter and smaller,
> smaller or no magnetic field.  Disadvantage: possible electrical noise
> generation.

> Many people will tell you that such-and-such a switcher is totally
> quiet.  This seems to vary by particular unit.

My Alinco DM-330MV (32 Amp) switcher sits right next to my K2 and works
fine. Do I just not know what to listen for? What should this ps sound like?
This particular model allows me to adjust the noise frequency to move it out
of the way if necessary. I've twisted that knob from one stop to the other
and I don't hear any difference on the K2.

Craig
NZ0R
K1 #1966
K2/100 #4941

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