LF: Re: 136kHz and Rugby Loran

["James Moritz" <james.moritz@btopenworld.com>]

Dear David, LF Group,

 

I made a .wav file recording of the Loran start-up this morning at about 0651utc - I'll try and edit this down to a reasonable size. For the last couple of weeks, the Rugby Loran has not operated at the weekends, only during the day on weekdays starting around 0700 utc until about 1530 utc. I wasn't around yesterday, but it seems to be following that pattern today.

 

Cheers, Jim Moritz

73 de M0BMU

----- Original Message -----

From: G0MRF@aol.com

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, July 05, 2005 8:44 AM

Subject: Re: LF: Re: Re: 136kHz and Rugby Loran

Hello Jim.

 

Thanks for the 'permission'  I'll try and information gather for a couple of days and then send them something fairly complete by the end of the week.

 

Yes, a recording from Dave would be very convincing. I must calculate the exact distance from here and try to get a 'specrogram' of the QRM. Thanks in particular for the very useful 'added noise within a specific bandwidth' figures.

 

Do you know if it's been operational recently on a daily basis or is it still a few days on then a couple of days off while they make adjustments?

 

Regards

 

David

 

 

 

In a message dated 04/07/2005 21:58:47 GMT Standard Time, james.moritz@btopenworld.com writes:

Dear David, LF Group,

 

Please feel free to use the "published" info. So far, the only day I captured the exact times of operation was 30th June, when Rugby started at 0650 utc and shut down at 1526 utc, if the clock in my computer is to be believed. At the moment, Rugby still seems to be operating the Loran TX "office hours only" - it usually seems to come on about 8am BST, give or take 20 mins or so - perhaps it would be a good idea  to make some audio recordings as .wav files or similar of the actual start-up. I guess this would be pretty convincing, especially if G3YXM can make a recording! There was so much QRN during the afternoons in the last couple of weeks it was hard to see on my spectrograms where the transmissions actually shut down, but that may have improved this week. But since the natural band noise is quite low in these summer mornings, the effect of the Loran noise is more impressive then. I will set my alarm clock for tomorrow morning.