[RFI] Fw: 40M RFI

w6jh at yahoo.com w6jh at yahoo.com
Sat Feb 6 22:18:17 EST 2021

This RFI starts up each evening. It's not present during the afternoon and usually doesn't start until well after dark I did notice it earlier this morning well after sunrise. It was gone later in the day. It starts as several narrow "humps" walking across the panadapter from lower to higher frequency. They appear at first as almost horizontal sweep lines on the waterfall gradually curving upward to vertical and after 20 or 30 seconds settling into the pattern seen below. I can't seem to correlate it to anything in the house. I suspected my neighbor's energy saving, variable speed pool pump because the startup pattern makes me think it's rotating machinery. However, I think his pump was running this afternoon while the rfi was NOT present, and vice versa this evening. It's most pronounced on a vertical, I can see it a little on an inverted vee. It extends above and below the 40 meter band, but I don't see it on 80M or on 30M. Any idea where to start looking?


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