[OZAPRS] Australian requirements

Andrew Rich vk4tec at people.net.au
Sun Aug 12 18:34:06 EST 2007


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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