[time-nuts] Adret 4101A, the DCF77 and a good antenna
magnus at rubidium.dyndns.org
Wed Oct 21 00:30:34 UTC 2009
Alan Melia wrote:
> Marco, have you considered that HBG on 75.0kHz might be stronger with you
> from Switzerland??. In a lab or other complex quite often with off-air
> standards the problem is local noise. I have a friend in Porto who used to
> be able to lock to MSF when it was at Rugby a few years ago.......I havent
> asked since it moved north to Anthorn but I suspect he uses GPS now. If the
> noise is not a problem these receiver will often work well on a resonable
> wire antenna which is fairly easy to rig. Or see the PA0RDT MiniWhip design
> for a very simple active low frequency antenna. This is used all round the
> world for receiving weak amateur signals on 136kHz ....it is broadband up to
> about 500kHz, and down to 40kHz Japanese frequency standard transmissions.
> It is so small you can experiment to find the best quiet position. At LF the
> secret is the higher the better.
The TDF 162 kHz is a 2 MW transmitter which is even closer...
A bit tricker to retriev the timing signal thought, but this is assuming
the signal can be freely selected.
The HBG transmitter is going off-air (for good) in a not to distant future.
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