[Elecraft] P3 - Appearent P3 Anomoly

[Guy Olinger K2AV]

When you placed your hand on the P3, you changed its "miscellaneous
chassis resonance" when floating. Try grounding the P3 and see if it
goes away.  Sources?  That looks most like a switching power supply or
something from a monitor.

Also check to see if the cover itself is somehow (by the paint) not
connecting to the rest of the case.

73, Guy

On Tue, May 3, 2011 at 1:26 PM, Don Wines <dwines at suddenlink.net> wrote:
> Guys,
>
> My P3 has developed a problem that appears to be some internally generated noise that shows up on the screen but doesn't come from the K3. Below is a link to a video I made this morning for a visual description of the problem. After the P3 has warmed up it will disappear. It will gradually migrate from right to left (higher to lower in freq) and eventually either disappear or go out of range of the display. It doesn't to interfere with reception even when the signal is within the noise boundary.
>
> This problem seems to occur on all bands from 40 thru 10 meters. I haven't seen it below 40 meters. There is no ground lug on the P3 but the K3 itself is well grounded.
>
> http://www.flickr.com/photos/43690708@N02/5684413732/
>
> I didn't show it on the video but when the Select knob is turned even with no function displayed the noise spreads out over a much wider span but then re-concentrates after the knob is left alone.
>
> The P3 has performed flawlessly up to this point. This problem seems to be superficial in that is doesn't otherwise affect the operation of the unit.
>
> Any ideas from anybody especially you guys in Aptos!
>
> Don Wines
> K5DW
>
>
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