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Re: LF: Re: 136kHz and Rugby Loran

To: [email protected]
Subject: Re: LF: Re: 136kHz and Rugby Loran
From: [email protected]
Date: Tue, 5 Jul 2005 08:23:52 EDT
Delivery-date: Tue, 05 Jul 2005 13:24:35 +0100
Envelope-to: [email protected]
Reply-to: [email protected]
Sender: [email protected]
In a message dated 05/07/2005 08:23:30 GMT Standard Time, [email protected] writes:
At the next cave radio field meet in the UK, which is likely to be in September (but the location is not yet decided), it is hoped to make measurements of Loran signal strength on 87kHz and compare them with those in past years.  Cave rescue organisations which use Heyphones and Molephones are also being asked if they have noticed any difference in interference levels.

A note will also appear in the forthcoming CREG Journal alerting people to the tests.

John G3PAI
Hello John.
Thank you for that. I will be interested to know what if any deterioration in signal levels you measure. As a 'rescue service' any interference to your group would be considered more important than that caused to 'amateur radio'.
As most new installations like Rugby go through a well defined period of commissioning along the lines of:
Hand over to operators
It may be the case that the Trinity House and Loran personnel will be aware that interference reported during the early stages is likely to be serious, while interference reported after 4 months of operation may not be that severe. Consequently, It's probably worth doing any monitoring sooner rather than later.
Pehaps if you have a cave rescue 'reflector' you could ask for any changes in reception to be reported at an earlier stage. Having said that it does appear that the Loran station is off at the weekends.......which is probably the most popular times for caving.
Many thanks
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