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Some information on the tracker VK6MRG-8

(Update. The wagon has been retired and a 2014 Toyota Prado GXL has taken it's place.

The system has been updated and installed in the Prado. It is identical to the Ute setup. More below)

I an using an Argent Data Open Tracker with a Puxing 777 handheld radio in my Wagon with very good results. 5 watts can be restrictive at times but sometimes it can surprise you. I got a call one day from Rick VK6XLR to say that he had seen my wagon via his DIGI in Geraldton while I was driving around parts of Perth (about 360 km's). And as I mostly drive the wagon around Perth, this will be the way this tracker will stay for the foreseeable future.

The Radio and tracker are operated via the APO3.

The APO3 is a black box designed to prevent a vehicle battery from being discharged and damaged by a DC load. Typically it is used to switch a radio transceiver off 10 minutes after the vehicle is shut off.

The APO3 is designed for 12 volt vehicle electrical systems with negative ground. It can switch up to 20 amps and carry up to 30 amps. The shutdown voltage can be set to one of four pre-programmed voltages (11.8, 12.1, 12.7, 13.05 volts) using two DIP switches; the shutdown delay can be set to one of four pre-programmed times (0, 5, 10, 20 minutes). The device is housed in a sturdy ABS plastic case.


Puxing PX-777 PLUS VHF Handheld Radio


The PX-777 is an unbeatable value for basic VHF communications, and better than any other radio we've seen demonstrates that Chinese radio manufacturers have finally achieved the level of quality and sophistication that western consumers demand. This radio is easily a match for any of the current generation of entry-level Japanese models, and at a lower price.


The PLUS version adds ANI and scrambler functions. While the scrambler isn't exactly military-grade encryption, it's sufficient to prevent casual eavesdropping and ensure a reasonable degree of privacy.

These radios are FCC Part 90 certified, shipped straight from the factory to our California warehouse, not gray market imports like most you're likely to find online.


The radio ships with a 1200 mAh Li-ion battery, but at a total of 8 ounces (227 grams) it weighs 1/3 less than the comparably-sized VX-150 despite having 70% more battery capacity.


A drop-in charger is included. The provided wall adapter is the standard US two prong type, and functions on 110 or 220 volts. The charger can also be used with any 12-volt, 1 amp source connected to its 2.1 x 5.5mm DC jack.


The speaker/mic connection is identical to the type used by most Kenwood handhelds.


Features include:


  • 5 Watt output power
  • 136 - 174 MHz frequency range
  • 1200 mAh Li-ion battery
  • 128 Memory channels
  • Wide (25 kHz) or narrow (12.5 kHz) operation
  • 3-color display backlight and backlit keypad
  • PC-programmable  




Warranty: 1 year


This product is for use by licensed operators only.

The OpenTracker+ is the second generation of OpenTracker that Argent Data produced. It is a single through-hole board with two DB9 ports on it, one for programming and GPS data in, and the other port for radio connection.

Features include: - 1200,300, and PSK31 transmit of APRS protocol data. - Encode and transmit data from several supported weather stations. - Report temperature and voltage from on-board sensors - Outputs waypoint data for display on various external devices

The firmware is programmable via the OTWINCFG program. The unit does not print all recived packets, although it does decode it for efficient channel usage.

The OpenTracker+ has a single port for computer or GPS connection. The OpenTracker2 has two ports for GPS/computer.

open tracker


Last Updated on Wednesday, 09 November 2016 16:58