[OZAPRS] Australian Stations Wanting an 8Wversion of ByonicsMicro-trak 8000 on 145.175 MHz

Andrew Rich vk4tec at people.net.au
Mon Aug 6 08:24:14 EST 2007


How come we can't make these ?

Surely someone can makes PCB's and the module looks made by some mob like
radiometrix



-----Original Message-----
From: Darryl Smith [mailto:Darryl at radio-active.net.au]
Sent: Monday, 6 August 2007 8:20 AM
To: vk4tec at people.net.au; 'VK / ZL APRS Users'; 'Ben Lindner'
Subject: RE: [OZAPRS] Australian Stations Wanting an 8W version of
ByonicsMicro-trak 8000 on 145.175 MHz


The use of 144.390 MHz is intended only for international operations, such
as through satellites. It should not be used for special operations,
except
in very special circumstances. The primary use of 144.390 MHz is for low
signal operations. One of the reasons that most people do not hear
transmissions on that frequency is that they are commonly using FM, and
most
low signal operations are FM. Also the low signal people tend to transmit
at
lower powers and use much higher gain antennas than the APRS operators
use.
The truth is that we really have no idea if someone is using that
frequency.

With multi-station receivers using software defined radios and Digital
Signal Processing, signals just above the noise floor are potentially
usable.

And I agree that the use of a transmit only device is a really bad idea.
Even with using timeslotting you will get collisions since the TT3 code
takes a little time after power on to synchronise. And then there are the
other people who are using the same frequency who may not be involved with
the same event.

I have considered using the transmitter for one of my projects, and I have
two issues. First is that it is transmit only, and the second is that the
device is not frequency agile. Both of these are killers.

Darryl


-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Andrew Rich
Sent: Monday, 6 August 2007 7:56 AM
To: Ben Lindner; VK / ZL APRS Users
Subject: Re: [OZAPRS] Australian Stations Wanting an 8W version of
ByonicsMicro-trak 8000 on 145.175 MHz

If you want to use it full time for APRS, the clash of packets will be an
issue.

If you want to use it for special events, no probs.

Actually the currrent 144.390 Mhz version suits me to a tee.

Cause when I fly it in a plane, it will not trigger off every digi in the
hood.



-----Original Message-----
From: Ben Lindner [mailto:vk5jfk at activ8.net.au]
Sent: Monday, 6 August 2007 7:46 AM
To: vk4tec at people.net.au; VK / ZL APRS Users
Subject: Re: [OZAPRS] Australian Stations Wanting an 8W version of
ByonicsMicro-trak 8000 on 145.175 MHz


I think my callsign ( VK5JFK ) should come off the list Andrew, because
of the Txing over others.

Ben Lindner
VK5JFK

Andrew Rich wrote:
>
> VK7ARN
> VK3ECV
> VK4TEC
> VK5JFK
> VK3XIL
> VK7DIK
> VK4BBS - pending price
> VK4TGV - pending price
>
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4/08/2007
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> _______________________________________________
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>
>
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