[Elecraft] P3 Display Anomaly

[Tony Estep]

On Thu, Mar 15, 2012 at 6:00 PM, Jim Bennett <w6jhb at mac.com> wrote:
> ...Every so often, perhaps once every 20 - 40 seconds or so, I see some sort of spur go flying across the screen.....
================
I see 'em too, Jim, and I know they're for real because I can hear
them in my headphones. I don't know if you usually use headphones, but
if you do I'm pretty sure you too will hear the spurs as they fly
across.

Some of these may be beacons. There are some beacons that sweep from
low to high, with antennas that shoot straight up; they are used by
NOAA or some agency (don't know which) to map the MUF. And of course
there are many sources of pure garbage, such as those described by Jim
W0EB in his interesting post.

There are also innumerable sources of non-sweeping junk being radiated
throughout the spectrum. I guess somebody knows what it all is, but I
sure don't. One of the most irritating appears as a bunch of
closely-spaced carriers that show up on the spectrum as a hump-shaped
series of vertical lines, and sounds like a table-saw. I see this at
various times and places on all bands. At my QTH one of these seems to
come on whenever there's juicy but weak DX on 30 meters.

Tony KT0NY



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