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LF: 137689.6 Hz

To: [email protected]
Subject: LF: 137689.6 Hz
From: [email protected]
Date: Mon, 16 Apr 2001 16:28:50 EDT
Reply-to: [email protected]
Sender: <[email protected]>
Hi John and all,

unlike Loran, those DCF42/49 intermodulation frequencies do not spread all over the band. I have observed discrete lines only in the region 135.48 to 135.61 kHz, which corresponds to n = 0...5 in the formula (136547.5 +- n * 11.42) Hz, plus a fair bit of broadband noise below 136.7 kHz. Also, here at 160km they are constant to within a dB or so, whereas 137689.6 fades from typically -8 dBuV/m right down to invisibility. Wonder what corner of the globe it actually comes from...

73 de Markus, DF6NM

 The line reported at 137689.6 would fit:
 2*f(DCF49) - (fp-fd) +- n(fd/104), with n = 204 to within 0.3Hz,
 according to the formula you supplied to me at the end of last year.
 It is not a Loran line.
 73 John, G4CNN



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