[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: More Clutter on 2.4 GHz



Maybe I should put a couple of pence into this for what ever it's worth
For  the last four years I have had my ISP hook up via 2.4 gHz 
A Cisco 350 system over a 15 mile connect at 100 mw.
Weather has not been a factor.
I use a 36 inch vertically polarized dish .
50 feet of LMR 400 coax to the Cisco transceiver.
This is possible because the dish looks down a water shed where the fall
off 
is equal to at least 3 feet per mile.
That makes trees disappear so to speak.
All of this might be a bit unusual , but it is possible.

I also use 2.4 gHz for Sat TV extention 
3 systems using 433 mHz for data and control .
My shack is a separate building 50 feet behind the house.
The only interference I had on 2.4 gHz was when Santa provided a 
telephone remote that was a frequenncy hopper on 2.4 gHz.
I gave that back to Santa and asked for 900 mHz spread spectrum unit
No more interferrence.

And last, I live in a 150 person village 50 miles from all the big city
interferrence  
I see referred to here on the BB

73's

Joe  Murray  K0VTY
Amsat # 860
Area Coordinator for NE
==============================
On Mon, 9 Oct 2006 00:47:25 +0100 (BST) Trevor <m5aka@yahoo.co.uk>
writes:
> I presume the eventual aim must be world-wide sales to achieve 
> economies of
> scale. Quite frankly 10 km is a joke as you probably wouldn't even 
> get that
> hilltop-to-hilltop. In a real-world environment a max range of 1 km 
> would be
> more likely.
> 
> As I read the latest Ofcom Licence Excemption document it looks like 
> these
> devices may be limited to 100 mW in the UK, see 
> 
> http://www.ofcom.org.uk/consult/condocs/exemption/exemption.pdf 
> 
> 73 Trevor M5AKA
> 
> --- Roger Kolakowski <rogerkola@aol.com> wrote:
> 
> > I googled the product with the "50" at the end of the part number 
> and
> > several sites came up with "claimed" ranges between 5 and 10 
> kilometers.
> > Because the product seems only to be available in the UK I didn't 
> convert it
> > to miles but I think it's 3-6 of them.
> > 
> > Roger
> > WA1KAT
> > 
> > ----- Original Message ----- 
> > From: "Trevor" <m5aka@yahoo.co.uk>
> > To: "AMSAT BB" <amsat-bb@amsat.org>
> > Sent: Sunday, October 08, 2006 4:03 PM
> > Subject: [amsat-bb] Re: More Clutter on 2.4 GHz
> > 
> > 
> > > --- Roger Kolakowski <rogerkola@aol.com> wrote:
> > >
> > > > And these radios have a range of 5 to 10 kilometers while you 
> get to
> > hold
> > > > them up against your head while transmitting!
> > >
> > > I didn't see any range figures on the website, I'd have though a 
> max range
> > of 1
> > > km (0.6 miles) is more likely.
> > >
> > > 73 Trevor M5AKA
> > >
> > >
> > >
> > > ___________________________________________________________
> > > The all-new Yahoo! Mail goes wherever you go - free your email 
> address
> > from your Internet provider. 
> http://uk.docs.yahoo.com/nowyoucan.html
> > > _______________________________________________
> > > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the 
> author.
> > > Not an AMSAT-NA member? Join now to support the amateur 
> satellite program!
> > > Subscription settings: 
> http://amsat.org/mailman/listinfo/amsat-bb
> > >
> > 
> > 
> 
> 
> 
> 
>         
>         
>                 
> ___________________________________________________________ 
> All new Yahoo! Mail "The new Interface is stunning in its simplicity 
> and ease of use." - PC Magazine 
> http://uk.docs.yahoo.com/nowyoucan.html
> _______________________________________________
> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the 
> author.
> Not an AMSAT-NA member? Join now to support the amateur satellite 
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
> 
> 
_______________________________________________
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb



AMSAT Top AMSAT Home