Has anyone else noticed the dramatic increase in atmospheric noise
lately? On 20M, 30M, and 40M especially, I see a wide-band noise source
wandering back and forth across the bands. At times it almost looks
like a sine wave on the waterfall display. The noise will vary from an
S3 up to a 20/S9. It is especially troublesome on the frequencies I
use most, namely, 10.1389, 14.045, 14.070, 7045, and 7070. With the
antenna disconnected, the noise drops to S1 or less.
I use 3 different antennas, a Force-12 15 ft vertical about 50 feet from
the house, a homebrew 25 ft flagpole vertical about 30 feet away and an
inverted vee for 40M on the tower adjacent to the house fed with 450-ohm
ladderline to a 4:1 balun at 50 feet. All three exhibit the same
patterns and are separated by at least 50 feet from each other.
I am using the Rocky utility connected to the I/Q output of my KX3 to a
48KHz USB sound card input to the laptop computer.
-- W7HD KX3#6966
Licensed continuously since 1967
Now retired!
Tucson, AZ
Sent with Postbox <http://www.getpostbox.com>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
