[RFI] Microwave RFI - radiated (?)

[Donald Kerns]

rfi-request at contesting.com wrote:
> Date: Wed, 07 May 2008 16:31:30 -0700
> From: "Jim Brown" <jim at audiosystemsgroup.com>
> Subject: Re: [RFI] Microwave RFI - radiated (?)
>
>   
> Try more toroids in the stack and use close-wound turns to lower 
> the resonant frequency, using the data for coax of similar size as 
> a guide. If that helps, it's being radiated by the power cord, If 
> it doesn't, it's probably being radiated by internal wiring. 
>   
OK, four (4) turns of the power cord around four (4) of the toroids 
doesn't touch the noise.

That sort of says radiated rather than conducted to me.

The microwave was a wedding present, so it is at least (counts on 
fingers and toes) 13 years old.

I've put a recording up at http://www.kernsanalysis.com/ham/microwave.wav

7.131 MHz, AM mode 9.0 KHz filter  (note how noisy my location is even 
without the microwave...)

73 de Donald