[time-nuts] Adret 4101A, the DCF77 and a good antenna

Jean-Louis Oneto Jean-Louis.Oneto at obs-azur.fr
Wed Oct 21 18:47:10 UTC 2009

There is a good list of time signals on the web site of the BIPM:
in the "Time Signals" in the Scales division of the FTP server of the Time, 
Frequency and Gravimetry section. The most recent is dated 2008.
Jean-Louis Oneto
----- Original Message ----- 
From: "Florian Teply" <usenet at teply.info>
To: <time-nuts at febo.com>
Sent: Wednesday, October 21, 2009 6:05 PM
Subject: Re: [time-nuts] Adret 4101A, the DCF77 and a good antenna

> Am Wednesday 21 October 2009 01:16:55 schrieb Alan Melia:
>> 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.
> I may very well be mistaken (and do hope so indeed), but isn't HBG about 
> to be
> shut down quite soon? Maybe that i'm mixing that one up with another one
> though.
> BTW, is there such a thing as a comprehensive page on frequency standard
> transmissions on the web? That Japanese 40kHz sounds quite interesting...
> And as far as i recall, reception of those LF signals is supposed to be 
> better
> at night as there probably is less man-made noise and better propagation.
> HTH,
> Florian
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