[Elecraft] Use of PC power supplies with K2

[Bob Nielsen]

I have used the MFJ-4103 (13.8 v, 2.89 amps) with my K2 and haven't noticed any switching noise issues.

Bob, N7XY

On Oct 3, 2010, at 10:47 AM, Kenneth Moorman wrote:

> I would like to hear from anyone who has attempted to use one of the small
> external PC AC adapter power supplies with a K2.  They are, of course,
> switchers, so I am not very hopeful.  I have found a couple of possible
> candidates, one a Meanwell P40A-4PSJ rated at 13.8 volts at 2.66 amps and
> the other an APS AD-740U-1138, rated at 13.8 volts at 2.8 amps.  They seem
> to have somewhat comparable specs as to regulation, ripple, and protection.
> I suspect they would be pretty bad on RFI, so even though they can be had
> cheaply, they may not be worth the grief.  My fallback position would likely
> be the little unit from Gamma Research, HPS-1a, but that will be twice as
> heavy and probably ten times more expensive....but from what I've read about
> it, it is not very noisy electrically.  I would really appreciate any
> thoughts, especially those with first hand experience.  This would only be
> for portable operation, not "normal" use.  Thanks.