[RFI] New RFI source for me...

Michael C Martin mike at rfiservices.com
Sun Jul 24 11:42:11 EDT 2016

Hello Dave,
My first guess is a door bell transformer. Check out these instructions and if I can help you are welcome to call.



Best wishes,
Michael C. Martin
RFI Services
PO Box 411
Traceys Landing, MD 20779
mike at rfiservices.com

-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Dave Cole
Sent: Sunday, July 24, 2016 10:41 AM
To: rfi at contesting.com
Subject: [RFI] New RFI source for me...


I have had a new RFI source pop up here in the past few days...  It
appears to be on a timer, running at night, but does not sound like a
lighting system I am familiar with.  It starts about 8:30 PM, and ends
at about 8 AM the next morning.  It is quite odd from my prespective, in
that I have never heard one like this before...

Audio is here:

Anyone ever hear something like this?

It appears to cover 1.7 MHz., to about 4.00 Mhz, and I swear, it rolls
off to protect the AM band.  It reminds me of one of the Ethernet over
power line devices when I look at it with a Spectrum Analyzer.  The
signal looks to be rolled off starting at 1.7 MHz., and gone by 1.6 MHz.

Anyway, any suggestions as to what it might be would be helpful to me in
locating it.    My mobile antenna is under repair at this time, so I am
doing my homework prior to a locate run.

73's, and thanks,
Dave (NK7Z)
For software/hardware reviews see:
73's, and thanks,
Dave (NK7Z)
For software/hardware reviews see:

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