Looks like a switching power supply running at 55 kHz. If you zoom in on
one of the spikes, you'll probably see an asymmetrical spectrum, with a
longer tail on one side. And it will probably be drifting around a lot.
73,
Scott K9MA
On 4/15/2020 11:02, Eddie Edwards wrote:
Without seeing the motion, hard to tell what it's really doing. Anything with
a free-running oscillator might cause that. Those old touch controlled lamps
use to make multiple drifting spikes like that and lots of noise as well with
clumps of noise every so many KHz.
Only way to know for sure what kind of device is to DF or track it down.
73, de ed -K0iL
-----Original Message-----
From: RFI <rfi-bounces+eddieedwards=centurylink.net@contesting.com> On Behalf
Of Matt Foster
The linked image shows interference that, as far as I know, is always present for me on 15m.
I’m talking primarily about what is appearing between about 1400 and 2100 on the
waterfall. If you look closely, you’ll see that the lines are leaning slightly to the
right. They VERY slowly progress up in frequency and then back down in frequency. It appears
to me that there is a spike about every 55 Hz. I have no idea what this might be.
I thought someone on here might recognize it.
https://drive.google.com/file/d/1FthSrYNX1ogF9IGJAYA_TeeHWFF7qrch/view?usp=sharing
Thanks and 73,
Matt, N0EYE
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--
Scott K9MA
k9ma@sdellington.us
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