New licence free digital 2.4 GHz handheld two-way radios have been launched. These feature Frequency Hopping Spread Spectrum (FHSS) for enhance security and provide one-to-one and one-to-many calling. Full details at
http://www.relcom.co.uk/digital1.htm
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And these radios have a range of 5 to 10 kilometers while you get to hold them up against your head while transmitting!
And to think I used to be wary of standing in front of my microwave oven!
Roger WA1KAT
----- Original Message ----- From: "Trevor" m5aka@yahoo.co.uk To: "AMSAT BB" amsat-bb@amsat.org Sent: Sunday, October 08, 2006 5:53 AM Subject: [amsat-bb] More Clutter on 2.4 GHz
New licence free digital 2.4 GHz handheld two-way radios have been
launched.
These feature Frequency Hopping Spread Spectrum (FHSS) for enhance
security and
provide one-to-one and one-to-many calling. Full details at
http://www.relcom.co.uk/digital1.htm
73 Trevor M5AKA
Daily Amateur Radio RSS News: http://www.southgatearc.org/ Email your news items to: editor at southgatearc.org
News On Your Website: http://www.southgatearc.org/rss/index.htm News On Your PC: http://www.southgatearc.org/rss/newsreader.htm Upload Your News: http://www.southgatearc.org/news/your_news.htm
To help you stay safe and secure online, we've developed the all new
Yahoo! Security Centre. http://uk.security.yahoo.com
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
--- 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
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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
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
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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<<<
Well, with all the existing sources for interference we have uncovered over the past weeks, I don't see 100mw on 2.4 doing anything that 5w on VHF or UHF doesn't already do...except maybe have better battery life.
Roger WA1KAT
participants (2)
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Roger Kolakowski -
Trevor