1. Audio Interfacing for APRS and Digital and SSTV modes

2. Micro-Trak RTG 50 - $210 without GPS or Antenna

3. Micro-Trak RTG FA, GPS, Antenna Combo - $220

4. Micro-Trak AIO w/ V2 rubber duck antenna - $260

5. “Simple” Route for APRS tracker
Pay $95+Shipping for a bundle from Argent Data Sytems

6. Tracker3 Model T3-Mini

7. Opentracker Plus Radio DB-9

8. Simple Digital/SSTV Interface
Pay about $120+shipping for an Tigertronics SignaLink™ USB

9. Make Your Own Interface- Web Pages of Interest
tablet Interface

10. https://sites.google.com/site/kh6tyinterface/

11. http://www.g4ilo.com/usblink.html VOX circuit

12. W5ZIT Interface from fldigi manual

13. CW Keying form fldigi manual

14. APRS Soundcard Programs

15. Aspects Mechanics Electrical Type/Pinout of Connector
6-pin and 13-pin mini-DIN, RJ-45, RJ-22 etc
fit of parts(eg heat sink clearance)
Tip, Ring(s) and Sleeve oh my
Electrical
Isolation
Voltage, Current and Impedance Levels

16. Typical APRS Tracker Pinout

17. Kenwood TM-D710 6-pin Mini-DIN Radio Audio Pinout
DE=Ground PKD=Audio input PR1=Receiver 1200baud output
PR9=Receiver 9600baud output PKS=PTT
Yaesu FT-897 Radio Audio Pinout is the same

18. Fit of Parts Be aware of the clearances need by YOUR radios connects
FT-897 input for the CW key is a 1/8”(3.5mm) STERO phone jack. Adapters for ¼” to 1/8” do not always fit flush due to the heat sink.

19. TRRS=Tip-Ring-Ring-Sleeve

20. Kenwood TH-F6A Speaker/Mic Pinout usable for Chinese Radios

21. Isolation and level control
Transformers for audio signals
Opto-Isolator for serial/parallel port PTT
Use Speaker/Headpone from computer
Use Mic input to computer
Use attenuator to make coarse level adjustments

22. Acoustical Interface