Last Opened for Editing.30 June 2006
My interest in trying to record propagation enhancements was initiated by the RSGB Propagation Studies. The Yahoo "Greyline" group is not too active, no doubt due to work pressures on the co-ordinator. The group is primarily interested in "true greyline" when both sites are experiencing dusk/dawn. I have decided to publish my results here in the hope it promotes some interest. Please email if you wish. Grayline, an alternative spelling.
Especially useful would be knowledge of suitable stations to monitor. They have to be identifiable and transmit continuously with constant power and antenna on the same frequency during the "Greyline" period. IF anyone wants to study the recordings in detail I SHOULD be able to find the SpecLab text files and screen captures.
Notes on using SpecLab to observe and make recordings.
Some Examples of Dusk/Dawn Enhancements on Various Stations. Some Techniques used to identify stations.
Latest Recordings. I am looking at some African stations giving near mutual greyline. (Goes to my local site)
Excel Charts of SpecLab recordings. Some of these pages will take some time to load on a slow connection.
Recordings from VP8FI on Various Frequencies These are attempts to record "true greyline". November-December 2004
Click link to email If you see no link or it does not work Click HERE Please include QSL.NEL/my Callsign in the Subject Line. Make the subject VERY relevant - with the amount of spam I get an email from an unknown source can easily be discarded!
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May 2006 THE LINKS BELOW WILL NOT WORK. I INCLUDE THEM TO SHOW WHAT I HAVE AVAILABLE. THEY MAY BE POSTED AGAIN SOMEWHERE OR IF YOU ARE INTERESTED EMAIL ME.
Recordings showing the few recordings from Alice Springs 2310KHz when signal strength was higher than normal. Jan-April 2005
Recordings on 2310KHz from Alice Springs Australia . This page has more than 40 charts on it. I have converted these from GIF to PNG format giving similar image quality but half file size. Page size ≈ 0.5MB Jan-April 2005
Australia Continued October 2005. Recordings from Northern Territory stations. 120 metre band.
Australia Continued November 2005. Recordings from Northern Territory stations. 120 metre band.
Australia Continued December 2005. Recordings from Northern Territory stations. 120 metre band.
Australia Continued January 2006. Recordings from Northern Territory stations. 120 metre band.
Australia Continued February 2006. Recordings from Northern Territory stations. 120 metre band.
Australia Continued March 2006. Recordings from Northern Territory stations. 120 metre band.
Australia Continued April 2006. Recordings from Northern Territory stations. 120 metre band.
Recordings from Sydney? & some others Australia on 1701/1620KHz January 2006
Recordings from Sydney? & some others Australia on 1701/1620KHz February 2006
Some more recordings of AM, Medium Wave stations. Oct 2005
More miscellaneous recordings of Medium Wave stations. February 2006
A Study of WDHP 1620KHz USA Virgin Islands.
Recordings on 3210KHz from Nashville USA Dec 2004 onwards Oct 2005
Recordings on 5070KHz from Nashville USA. Oct 2005
A Comparison of reception from Alice Springs 2310KHz and Perth 1620KHz on 31 October 2005. Shows SpecLab "waterfall" (sideways) and Excel chart derived from the saved data. A similar reception pattern seen.