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Weird interference, every 66 Khz

Oct 18th 2021, 07:57

N1LOU

Joined: Mar 18th 2020, 15:25
Total Topics: 0
Total Posts: 0
I am noticing this interference on all bands from 10-160. it seems to recur every 66 Khz. It is noticeably absent above 35 Mhz. The amplitude of the interference differs among the bands being more noticeable on some. On 60 Meters it is the worse, and I actually see two different signals on the band, one spaced at 66 Khz and one very square shaped wave every 62 Khz. If I tune one of these signals it comes across as a soft white noise. It's not the worst interference as I can easily tune signals that are not right on top of one of these spikes, and they are actually quite far apart compared to the bandwidth of a typical SSB signal. Has anyone seen this and if so, what is it and how do I get rid of it

Oct 18th 2021, 08:03

N1LOU

Joined: Mar 18th 2020, 15:25
Total Topics: 0
Total Posts: 0
Is there a way to post pics to this forum? I would love to post up screenshots of the spectrum scope
Oct 18th 2021, 11:33

W1VT

Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
AFAIK QRZ.com is the only ham site the provides image hosting.
Jan 20th, 11:24

WR4N

Joined: May 27th 2020, 20:19
Total Topics: 0
Total Posts: 0
Please check my post from today. I have this on 80m, but it is audible and cycles on/off every 60 seconds.
Mar 25th, 09:33

WA2TP

Joined: Oct 29th 2016, 12:41
Total Topics: 0
Total Posts: 0
Quote by N1LOU
I am noticing this interference on all bands from 10-160. it seems to recur every 66 Khz. It is noticeably absent above 35 Mhz. The amplitude of the interference differs among the bands being more noticeable on some. On 60 Meters it is the worse, and I actually see two different signals on the band, one spaced at 66 Khz and one very square shaped wave every 62 Khz. If I tune one of these signals it comes across as a soft white noise. It's not the worst interference as I can easily tune signals that are not right on top of one of these spikes, and they are actually quite far apart compared to the bandwidth of a typical SSB signal. Has anyone seen this and if so, what is it and how do I get rid of it




I too have this exact same issue. I have not yet found it.
Mar 25th, 12:29

W1VT

Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
http://www.arrl.org/files/file/RFI/Thompson%20Noise.pdf

Locating RF Interference at HF
A proven and practical approach to dealing with RFI from grow lights and more.

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