Nick, I have been observing a similar signal for the past five months or
so, but it's usually between 1837-39. I believe that I've also seen it
drift above1840 on occasion, but I don't usually tune in that part of
the band. I suspected it might arise from a local source or something
in my house, but I hadn't been able to identify it. Listening on my RX
4-square, it seems to peak in no particular direction. Earlier in the
year I had to install ferrite on the coax going to each vertical in
order to eliminate some common mode pickup, but they had no effect on
this signal. Since I don't usually operate in that part of the band, it
hasn't been a serious problem for me. I can send you a screen shot of
the spectrum and waterfall for comparison, but based on your image and
description, it looks like the same thing.
73, Joe
K2XX
Nick Maslon - K1NZ <mailto:k1nz@arrl.net>
Thursday, March 15, 2018 12:48 AM
Caught this interference around the FT8 freq. It's causing trouble from
1.8407 to 1.8417. Any thoughts? It sounds like a buzz and seems to zig zag
over multiple minutes. https://imgur.com/SgXeJGx
Nick K1NZ
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