|Subject:||LF: US-Eu Frequency|
|Date:||Wed, 21 May 2003 17:03:52 EDT|
Hi Laurence, Laurie, Mike,|
well it would be great to see an American LF signal after all, despite the sad and hard-to-understand fact of the FCC's denial of a 136kHz ham band.
Receiving is always a little more difficult here in Central Europe 'cause we got "both ends burning"... lots of DCF39 Luxembourg IM at the top, while on the bottom DCF42/49 TX-intermodulation bursts come in, and SXV from Greece becomes quite strong at night.
Their current FSK spectrum (main peaks at 135683 and 783) has several sidebands, with a spectral density roughly 10dB over background noise near 135922. However there is a pronounced minimum now between 135890 and 135900Hz which could be useful. The problem is that as their frequency is drifting, the position of the clear gap may vary from week to week (see pic).
> I think it would be best to keep clear of top end of the band which might be
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