[RFI] Another Solar Panel Interference Case

[EDWARDS, EDDIE J]

Absolutely true Jim.  20 years ago our utility kept one technician busy part-time looking for power line noise complaints.  And 50 years ago, they kept 1 or even 2 or more technicians busy full time tracking power line noise issues to television, AM radio listeners and hams.  Today we have fewer than 6 to 8 powerline noise complaints per year average.  In 2020 we even had zero powerline noise complaints throughout our 14 county area and Omaha metro area.  

I suspect this is due to (1) shrinking markets in AM radio and OTA television, (2) Digital television changes so any existing OTA viewers don't even realize they have powerline noise, and (3) increased noise floor for HF hams hiding the powerline noise levels reported in the past.  

73, de ed -K0iL

-----Original Message-----
From: RFI On Behalf Of Jim Brown

On 4/5/2022 8:23 AM, EDWARDS, EDDIE J via RFI wrote:
> I've only seen RFI mentioned in passing a few times in Radio World a broadcast magazine.  Doesn't seem to be an issue for broadcasters typically operating from 5,000 watts to 50,000 watts.

It sure was 20 years ago for 50kW Chicago powerhouse WLS. Their chief engineer was a friend, told me that they had lots of complaints from Ford owners on the other side of town, who couldn't listen due to ignition noise.

73, Jim K9YC
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