[aprssig] APRS Databusrt
dave at emv.co.uk
Mon Aug 13 03:38:23 CDT 2007
434 is within the UK/EU amateur allocation, it's also a "spot" frequency
(well, close by, 433.94something) for general unlicenced QRP (mW)
devices such as garage door openers and car security systems. With all
the hassle and fall out as you might imagine, due to some political Euro
Numpty making a technicaly uninformed decision years ago. Here, 70cms
(430-440) is also shared with the military!. It's the only reason we
still have a presence there, they can tell us to QRT at any time if
I suspect we may loose a large chunk of that band in/arround London for
the 2012 Olympics, much as they did in Oz years back. Did they ever get
it back I wonder?
From: Andrew Rich [mailto:vk4tec at people.net.au]
Sent: Saturday, August 11, 2007 1:30 AM
Subject: [aprssig] APRS Databusrt
I would like to make representation to the company that makes
They are currently on 434 and 900 MHz licence free bands.
They do 19k2 on air at 10 mW.
I would like to ask them about producing a module that is up the
band a bit into the 70 cm region.
I have looked at after burners. For $80 I can get a kit that
will give me around 15 watts out.
The databurst is true FSK at 100 kHz.
I am now curious as to the licence implications.
Where would you run a digital signal around 100 kHz wide on 70
The data transmission is around 25 ms.
Here is the link to their website
This mail has been scanned by Palmer Cook Computer Services Limited. www.palmercook.co.uk
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