[RFI] Powerline noise humps?

Mike Ryan mryan001 at tampabay.rr.com
Wed May 11 07:48:16 EDT 2016

I have some awful noise that is particularly high on 6 meters right now. It 
shows up strongest in ssb modes rather than AM. The noise resembles 'wind' 
or a 'rushing sound', as if listening to someone talking in a car with a 
mobile radio and their window is down. The noise varies, has peaks and 
valleys..what a pain in the but.  Any ideas? - Mike

-----Original Message----- 
From: Jim Brown
Sent: Wednesday, May 11, 2016 12:33 AM
To: rfi at contesting.com
Subject: Re: [RFI] Powerline noise humps?

On Tue,5/10/2016 9:19 PM, David Winarsky wrote:
> - Here is a capture from my waterfall:http://imgur.com/HyuFcyK

My first guess is that it is the clock in some sort of microprocessor.
If the humps drift, they're probably a switching power supply.

73, Jim K9YC
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