[OZAPRS] APRS Tracker

[Andrew Rich]

Anyone experimenting with future APRS technologies ?

Andrew VK4TEC
  ----- Original Message ----- 
  From: Paul Mullins 
  To: 'Australian APRS Users' 
  Sent: Monday, November 29, 2010 8:29 PM
  Subject: Re: [OZAPRS] APRS Tracker


  I would love to get hold of a couple of vhf Taits T700s, I have a board that I designed to fit inside of the radio where the selcal board lives, and correct programming allows you to turn off and on the APRS using the AUX button, It used the TT4 dip chip only problem I found is you have to be committed to the project as the chip 'MUST' be soldered to the board, but worked very well.

  With the ability to turn off the APRS unit the radio can be used as a real radio for backup.

  The one I had setup channel 1 was 145.175 with the alert ctcss tone for no noise, I wish I could find more.

   

  If anybody knows of some Tait T700s VHF drop me a email.

   

  Cheers

  Paul 

  VK5VCO   

   


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  From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Ray Wells
  Sent: Monday, November 29, 2010 7:31 PM
  To: ozaprs at aprs.net.au
  Subject: Re: [OZAPRS] APRS Tracker

   

  We appear to be comparing apples with oranges when we compare 2m tx ONLY trackers with other styles of equipment, for any band, that at least has a receiver and at least makes some attempt to prevent transmission at inappropriate times.

  You don't have to be real smart to realise that a system that cannot listen doesn't comply with the Australian LCD.

  I have a TT3+ and a GPS from the same supplier - about $100 Australian. They are married to a Tait T500 that cost nothing because it has zero commercial value. The aprs mobile has;
  1. a tracker and GPS
  2. a receiver with the busy line connected to the TT3+ to ensure no tx when the channel is busy.

  It's small, light, cheap and conforms with the LCD. There are many equally cheap options available.

  Ray vk2tv



  On 29/11/10 19:16, vk5ex.andrew at gmail wrote: 

  Yes you are  ! .. My TT3 on HF wont TX when the squelch is open'ed by any other signal whether it be packet, voice etc. .. Possibly not the absolute best solution, but certainly seems to do the job in my experience 

  Regards .. Andrew .. VK5EX 

  ----- Original Message ----- From: "Howard Small" <howard at small.com.au> 
  To: "Australian APRS Users" <ozaprs at aprs.net.au> 
  Sent: Monday, November 29, 2010 4:13 PM 
  Subject: Re: [OZAPRS] APRS Tracker 





  Am I mistaken in believing that all the HF APRS user beacons are transmitted without any consideration for other traffic? 

  Howard 
  VK4BS 

  On 29/11/2010 14:54, Gary Stern wrote: 





  On 29/11/2010 12:44 PM, Darryl Smith wrote: 



      * a transmitter without receiver in the Strezleki desert is more acceptable than one in the Sydney CBD. 



  VFH/UHF sure.... HF .... nope !!  (in fact probably worse !) 





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