[time-nuts] VLF time stations in Europe

Alan Melia alan.melia at btinternet.com
Wed Sep 30 19:37:04 UTC 2009

Hi Magnus TDF (?) France Inter ( Allouis ) is, I believe, a strictly
frequency distribution station like Droitwich 198kHz (UK) carrier referenced
to a rubidium and measured by the French national bureau I expect. Details
of MSF and Droitwich are available from NPL

MSF, HBG, and DCF77 transmit time code, whereas  there is data on the MSF
and Allois carriers it is not time-code. I think Droitwich carries a utility
service a little like DCF39 Magdeburg but less wide ranging. I think
Droitwich is 500kW but may reduce at night.

Alan G3NYK

----- Original Message -----
From: "Magnus Danielson" <magnus at rubidium.dyndns.org>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Wednesday, September 30, 2009 7:43 PM
Subject: [time-nuts] VLF time stations in Europe

> Fellow time-nuts,
> I am trying to make an overview of VLF time stations that can reach
> Sweden and may be of practical use.
> Loran-C at 100 kHz seems obvious.
> DCF77 at 77,5 kHz (50 kW in Germany) is known, certainly within range
> (my receiver works without much trouble).
> MSF at 60 kHz (17 kW in GB) also works (a friend has working reception).
> TDF at 162 kHz (2 MW in France) should reach according to published
> chart, 3500 km range includes all of Sweden.
> HBG at 75 kHz (25 kW in Switzerland) may be a little to faint to be
> useable? 1000 km range seems too short. To close down in 2011.
> I know of the Russian military Beta signal (20,5 kHz to 25,5 kHz), but
> consider it of less importance in this case. Is received in Norway where
> reverse-engineering has been done.
> I also know of Chayka, the Russian equalent of Loran-C. Considering to
> include it.
> I assume that signal should be of considerable strength such that
> regular use does not require DX-ing skills and that fairly regular use
> can be made without having to figth wars agains S/N issues.
> Can anyone spot an obvious missing signal?
> Cheers,
> Magnus
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