Sunday, September 19, 2004

"Intruder Signal" on 40 Meters Remains a Mystery for Now

NEWINGTON, CT, Sep 9, 2004--An unidentified signal that's been showing up on the 40-meter phone band on or about 7238 kHz has mystified amateurs in the western US and Canada, where it's been heard frequently for the past few weeks. Although it resembles a steady carrier, a closer inspection suggests that the intruding signal actually is a series of closely space signals. Don Moman, VE6JY, in Edmonton, Alberta, says he's been hearing the signal quite loud at his QTH.

"This signal looks a lot more interesting than it would sound--just a broad tone/hum/buzz, depending on where you tune," he said. One spectrogram from VE6JY showed perhaps a half-dozen or more discrete signals. "It's certainly loud enough out here, peaking broadly south-southwest from Edmonton," he said. Moman was using a 5-element Yagi and was hearing the signal at 10 dB over S9. READ STORY