[RFI] weird noise "waves" 60 khz Apaert

[Tim Duffy]

This is classic switching power supply RFI. Inspect the RFI archives.
Switching power supplies are used in 100s of devices. Everything from iPhone
chargers, to wall warts, etc. Have you turned off your house breakers to
isolate?

73
Tim K3LR

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Pete Smith N4ZR
Sent: Tuesday, September 20, 2016 9:15 PM
To: RFI List
Subject: [RFI] weird noise "waves" 60 khz Apaert

Today, for the first time, I looked at the bands on the bandscope of my 
RTTY Skimmer Server.  To my surprise, the background noise level shows 
very pronounced maxima every 60 *Kilo*hertx, with a notch next to each 
maximum.  I'm trying to get a screenshot to post, but my Skimmer PC just 
died.  In the meantime, does this ring any bells with anyone.

These are not discrete peaks - more like parabolic shapes repeating 
every 60 KHz, but with significant energy on the upslopes.


-- 

73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
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"retail" DX cluster.

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