Topband: Noise on 160

[Joe Giacobello, K2XX]

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 at 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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