Hi ALl,
Originally this section of the 10 metre bandplan had a downlinks only restriction but this has now been removed in IARU Bandplans. From memory, Region 1 removed it at their Sun City Conference in 2011, Region 2 at their Conference in Cancun in 2012 but I don't think it was ever shown in any Region 3 documentation.
The original reason for it being there is unclear. It may have a been a fear of possible CB interference or it may have been because AO7 only used 29MHz for a downlink.
There often difference between the ITU allocations for the amateur satellite service and frequencies shown in bandplans.
For instance the complete 10 metre band is allocated by the ITU for amateur satellite operations but our IARU bandplans show just 29.300 29.510MHz.
Also, on 2 metres, the ITU allocation is 144-146MHz but by IARU agreement we only use 145.800-146.00MHz plus the new section at 144.0025 -145.025MHz which has already been agreed by IARU Regions 2 and 3 and will hopefully also be agreed by Region 1 at their Conference in Bulgaria in three weeks time!
Of course there are occasions when member societies have local variations of these regional bandplans but I would hope, in this case, it is simply an updating issue.
73 Graham G3VZV
-----Original Message----- From: [email protected] Sent: Sunday, August 31, 2014 10:47 AM To: [email protected] ; [email protected] Subject: Re: [amsat-bb] ARRL Bandplans
BTW does anyone know why ARRL thinks 29.3-29.510 is Downlink only ? and I haven't a clue what exactly they mean by using "(internationally)" for 70cm.
73 Trevor M5AKA
Hi Trevor.
I went off and looked at the UK allocations when I read that. Seems to be up or down and not limited to 29.3 either.
But, I did notice that 10.475 GHz to 10.500 GHz is allocated to the amateur satellite service, but not to amateurs in general. i.e. no terrestrial use. - That's a first !! We've got our own piece of spectrum.
http://www.ofcom.org.uk/static/archive/ra/publication/ra_info/br68r11/br68.h...
73
David
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