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 New threat to amateur bands.
 m3lsx   Quote Post
Posted: May 30 2006, 03:52 PM Post #2044 
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Taken from www.southgatearc.org

QUOTE
New proposals to provide wireless broadband in rural areas could pose a threat to amateur radio and amateur satellite services in the UK, warns amateur satellite group Amsat.

Telecoms regulator Ofcom has recently published a report that looks at options for bringing broadband to countryside communities.

One of the options is to provide rural areas with wireless broadband. However, because the broadband would have to cover a large area, it would be necessary for it to be transmitted at high power. The report proposes the use of powers up to 80W EIRP in the 2.4GHz band and 200W EIRP in the 5GHz band.

Radio amateurs currently have allocations in both of these bands, and Amsat is worried that the high power levels outlined in the report could cause serious interference to amateurs operating in these bands. The problem would be particularly severe on the 2.245-2.4GHz band which is used by both weak-signal amateur satellites and amateur TV repeaters.

An Amsat spokesman said: “It is hard to see how amateurs would be able to continue using these frequencies when faced by the high levels of interference from the high power applications envisaged by this report.”

Worryingly, the report makes no mention of amateur radio operation on the 2.4GHz band, suggesting that the potential impact of the plan on radio amateurs has either been overlooked or simply ignored. Loss of - or disruption to - the 2.4GHz amateur frequencies would be a major blow to radio hams, not least because four amateur satellites currently under construction will use 2.4GHz to provide amateurs with worldwide communications. The amateur Mars orbiter P5-A, due for launch in 2009, will also rely on the amateur 2.4GHz allocation.

Also under threat would be a plan to provide an amateur radio video link from the International Space Station to schools as part of the ARISS School Contact programme. Once again, this service will use 2.4GHz and could be jeopardised by the high-power transmissions outlined in the Ofcom report.

www.ofcom.org.uk/research/technology/overview/ese/exempt/
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Alan
2EØLSX
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 2E0JTP   Quote Post
Posted: Jun 2 2006, 01:21 PM Post #2050 
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Tricky situation that.

Do you deny broadband internet to hundreds of thousands (possibly millions) of rural people for the sake of 'X' hundred amateurs who use 2.4GHz and 5GHz?

I remember reading something about broadband over power lines a while ago from the states. Didn't it effect some of their HF bands or are they using different frequencies for the broadband signal in the UK?

Out of curiosity, how many amateurs use these frequencies? How many operators will it effect?
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 2E0JTP   Quote Post
Posted: Aug 4 2006, 09:03 PM Post #2229 
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Two months and two days with no responses. I guess not many then ...
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 Andy   Quote Post
Posted: Aug 5 2006, 03:50 PM Post #2232 
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I used to use it, Jon. Mainly for low-power TV links to local amateurs (within about 5 miles). There was also 'other' activity from airborne sources of course, which could be very entertaining.
High power stuff on nearby frquencies would completely bladder the front-end of the mast-head downconverter. Most unpleasant.
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Andy, G1HBE. www.freewebs.com/g1hbe
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 G7VGG   Quote Post
Posted: May 18 2009, 03:37 PM Post #3727 
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QUOTE (Andy @ Aug 5 2006, 03:50 PM)
I used to use it, Jon. Mainly for low-power TV links to local amateurs (within about 5 miles). There was also 'other' activity from airborne sources of course, which could be very entertaining.
High power stuff on nearby frquencies would completely bladder the front-end of the mast-head downconverter. Most unpleasant.
I used to use it, Jon. Mainly for low-power TV links to local amateurs (within about 5 miles). There was also 'other' activity from airborne sources of course, which could be very entertaining.
High power stuff on nearby frquencies would completely bladder the front-end of the mast-head downconverter. Most unpleasant.



Why has no one mentioned the very obvious dangers to human and wildlife health here?...2.4ghz is around the same frequency used by Microwave Ovens...Would you really like 80W plus of dangerous microwaves beaming at your property 24/7?... sad.gif
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 Quincy   Quote Post
Posted: Sep 25 2009, 11:22 AM Post #3994 
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Why not? It'd save on the heating bill!
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 gw8asd   Quote Post
Posted: Oct 26 2009, 10:00 PM Post #4020 
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QUOTE (2E0JTP @ Aug 4 2006, 09:03 PM)
Two months and two days with no responses. I guess not many then ...

No responses because of being active on the band. biggrin.gif
Just discovered this board.
It doesn't look very active so I though I'd post this whilst monitoring the 23cm beacon.
It's 313km away but can always be heard.
I'm trying to detect the 13cm one at the same location but it runs a lot less power so it's proving elusive at the moment. biggrin.gif
I'm just getting going on 13cm. Something new to try.
23cm is a very interesting band even with 100W and a 67ele (20db gain).
It would be nice to up the power and use a dish but lots of other things to try first. biggrin.gif

Cheers

Tony
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50MHz and above from IO83lb
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