[amsat-bb] Re: Amateur Satellite VHF Allocation

[Trevor]

--- Tony Langdon <vk3jed at gmail.com> wrote:
> At 07:37 PM 7/30/2007, Trevor wrote:
> >There has been some discussion over the past year about the need for 
> >an Amateur
> >Satellite allocation at 50-51 MHz.
> Which I can't see happening for some time, as there are still TV 
> broadcast stations populating that band around the world.  We in 
> eastern VK are limited to the top 2 MHz of the 6m band (52 - 54 MHz), 
> as well as a DX window between 50 and 50.3 MHz, due to a small number 
> of TV stations still occupying channel 0 (45 - 52 MHz).

Given the very low signal levels from Amateur Satellites they would not cause
any interference to those dwindling number of counties that still have TV on 50
MHz. 

Do you think eastern VK will still be broadcasting Analogue TV on 45 MHz in 10
years time ?

> >With yesterday's news about Amateur Operation in the form of experimental
> >beacons at 40 MHz perhaps in 5-10 years time we may be able to get a few
> >hundred kHz for Amateur Satellite at 40 MHz as well ? It certainly 
> >would be low
> >doppler shift and low path loss.
> 
> Interesting developments there.

Yes, a sat with a 50 to 40 MHz transponder would certainly be interesting. The
antennas would be more manageable that for 29.3 MHz.

The UK regulator recently had a consultation on uses for low band VHF (< 70
MHz), there was a distinct lack of interest in these frequencies from
commercial organisations. Commercial companies are more interested in UHF and
low microwave bands.

73 Trevor M5AKA



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