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LF: Local AM transmitter on PC output

To: [email protected]
Subject: LF: Local AM transmitter on PC output
From: "Andy Talbot" <[email protected]>
Date: Tue, 2 Oct 2007 15:58:42 +0100
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While testing an IQ upconverter chip, I discovered I've got several
tens of millivolts of Virgin AM on 1215kHz coming out of my PC's audio
output.  There is enough signal to see it on a frequency counter and
view the AM on a scope.

There is presumably a transmitter nearby, and/or some curious
resonance in the house wiring that accentuates pick up of this signal.
Its not the LF antenna picking up the signal, so I'm wondering if the
ring-main is forming a resonant loop :-)

Does anyone know where the transmitter site for this station is located?

Andy  G4JNT
www.scrbg.org/g4jnt


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