[OZAPRS] Fw: Australian requirements

Shaun Pitcher spitcher at energy.com.au
Mon Aug 13 09:20:57 EST 2007


Interesting.  I had not considered a PDA.

I wonder if I could interface a radio to my Garmin M4?

Regards, 
Shaun Pitcher   VK2XPP
spitcher at energy.com.au 





"Andrew Rich" <vk4tec at people.net.au> 
12/08/2007 06:34 PM
Please respond to
<vk4tec at people.net.au>


To
"Shaun Pitcher" <spitcher at energy.com.au>, "VK / ZL APRS Users" 
<ozaprs at aprs.net.au>
cc

Subject
RE: [OZAPRS] Australian requirements






Or you can do what merv does
 
Run APRS and GPS on a PDA and use GPRS to send your position
 
That is if you like keeping telephone companies rich 
 
 
 
 
--------------------------------------------------------------------------
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Andrew Rich VK4TEC
vk4tec at people.net.au
http://www.tech-software.net
 
 
-----Original Message-----
From: Shaun Pitcher [mailto:spitcher at energy.com.au]
Sent: Sunday, 12 August 2007 6:18 PM
To: vk4tec at people.net.au; VK / ZL APRS Users
Subject: Re: [OZAPRS] Australian requirements


I think I have realised that the modular design I was thinking of already 
exists. 

Serial GPS 
Tiny or Open tracker 
$99 HH or other suitable VHF radio. 
or Cheep HF unit if you wanted to have that flexibility when going bush. 

Sorry from the Newbie  :-)

Regards, 
Shaun Pitcher   VK2XPP
spitcher at energy.com.au 




"Andrew Rich" <vk4tec at people.net.au> 
Sent by: ozaprs-bounces at aprs.net.au 
12/08/2007 07:53 AM 

Please respond to
vk4tec at people.net.au; Please respond to
VK / ZL  APRS Users  <ozaprs at aprs.net.au>



To
"VK / ZL APRS Users" <ozaprs at aprs.net.au> 
cc

Subject
Re: [OZAPRS] Australian requirements








Build something - come on

That would be following the spirit and desire fo our fore fathers.

As far as VHF goes - I could not get the bts let alone spend the time - 
just
grab a $99 HT of ebay



-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au]On
Behalf Of Darryl Smith
Sent: Saturday, 11 August 2007 6:49 PM
To: 'VK / ZL APRS Users'
Subject: Re: [OZAPRS] Australian requirements


People

Much as I would love a radio like this to come about, I think we are 
kidding
ourselves to think it is possible.

TAPR tried to do a radio design similar to this with the 'Packet Radio'
radio. This project was a complete disaster. In fact every TAPR radio
project has been a disaster. The fact is that building radios is not easy.
It is a specialist area. Parts come and go, and you find that once your
design is complete and you are ready to beta test, then the parts will be
replaced and a new design effort will be required. Repeat.

Darryl

-----Original Message-----
From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Shaun Pitcher
Sent: Saturday, 11 August 2007 4:23 PM
To: VK / ZL APRS Users
Subject: Re: [OZAPRS] Australian requirements


You could go for a modular design.

First module is the fixed freq tx and receive with GPS and DC connection,
however it has outputs available so it can easily be used in a HF set-up.
(Audio out and some form of carrier detect or audio in to avoid HF clashes
and of course a PTT).  Obviously it will require some sort of PC interface
to set parameters and switch from 300 to 1200 baud, which could be a dip
or toggle switch. (this will get 90% of people up and running)

Second module is an afterburner to get you up to 20-30 watts VHF.
(personally I think I could get away with 5 watts for my application.)

Similarly a 50-100 watt single freq HF module that can be added for those
who use it bush.

So you basically mix and match for your needs with the first module able
to get you tracked and on the air with extra modules as required.

Regards,
Shaun Pitcher   VK2XPP





As an example consider the family car (not a 4X4). If one had a small
box that contained a custom designed single channel receiver and
transmitter with an aerial connection, a GPS input and a DC input.
This could be mounted in the boot and the only tell tail signs that
the installation existed would be the whip antenna. If this was
mounted on the windscreen glass it would be disguised for a mobile
phone setup. The GPS can be placed on the parcel shelf behind the
back seat and covered with a hat.



David


David G. Hopkins (Vk4ZF)
CAPALABA QLD.
AUSTRALIA
S27 32.191 E153 11.867


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