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Re: [RFI] Noise changes when room lights turn on / off

To: jim@audiosystemsgroup.com, Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Noise changes when room lights turn on / off
From: Tony <dxdx@optonline.net>
Date: Fri, 14 Sep 2012 16:31:00 -0400
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On 9/13/2012 11:52 PM, Jim Brown wrote:
On 9/13/2012 5:19 PM, Tony wrote:
Assuming it is a house wiring problem and not an appliance, what would cause it to come on in the evening and stay on till morning? Would temperature and humidity cause this?
I suspect a combination of things -- a wiring problem that is making 
the noise source radiate (or conduct) more effectively. The thing that 
makes me suspect house wiring is that you said you switch a light and 
the noise changes.  THAT'S why I said you should check your wiring 
very carefully, and all of us should anyway. The law of averages says 
that whoever did your house wiring made at least one mistake.  Some 
mistakes are a nuisance, some are very dangerous.
Good advice Jim. I checked the switch and the socket today and they 
appear to be wired correctly. Wiring is also in good condition. I shook 
the outlet and switch to see if noise changed, but nothing happened.
The only lights that could GENERATE noise are fluorescents or those 
that have a DC power supply.  It's become quite common for most track 
lighting to use a DC power supply, and they are virtually all 
switching power supplies. 73, Jim K9YC
Understand. In this case it's a simple incandescent bulb. I'll have the 
12 volt battery in hand this weekend so I can run the rig with the mains 
turned off.
Tony -K2MO




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