One of our projects was the construction of 5 portable APRS trackers for special events and use by the Arizona Repeater Association.
Specifications
Radio: MOTOROLA CM300 UHF 25 WATT 32 CHANNEL
GPS: Deluo WAAS
TNC: Open Track 2
Antenna: Diamond NR-770
Mag Mount: Larson NMO-MM-BNC
Batteries: Cyclon Monoblock (0809-0020 X-Cell)
Case: Pelican #1450
Charge Control: Solar Charge Controller