[Elecraft] K2 proximity to power supply

Mon Nov 17 13:43:00 2003

Which switching supply do you use?

dt
.

--- Floyd Sense <[email protected]> wrote:
> When I first got my K2 (a few weeks back), I discovered the problem that can
> be caused by proximity to the AC supply (in my case, Astron RS-30M) when I
> noted a rough CW note on received stations.  I moved the supply about 18
> inches away from the K2 and considered my problem solved.  Received CW
> sounded pure, and there was no trace of hum on my CW signal.  This weekend,
> I played around for a short time in the SS, and immediately got a couple of
> reports of "rough audio".  When I listened on my other transceiver, sure
> enough there was the AC hum on my SSB signal.  I reverted to the switching
> supply and all was well.  I'm not sure just how far away from the K2 you
> have to get a supply like the Astron in order to eliminate the hum, but it's
> sure more than 18-20 inches.  Once the hum problem was gone, I began getting
> "beautiful signal" reports again.
> 
> 73, Floyd - K8AC
> 
> 
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