RE: Spektrum Telemetry module and iPhone App.
I am not familiar with the Jr telemetry antenna. I use the DX8, the AR8000 receiver, the TM1000 DSMX Full Range Aircraft Telemetry Module. I have the airspeed module, airspeed module, Altitude module, RPM sensor, GPS sensor, Battery sensor, Head Temp sensor, and the Aircraft Telemetry 3-Axis GForce Sensor. All are monitored via the DX8 and an Iphone with the Spekctum Sti software from iTunes and the STi Telemetry Interface device attached to the iPhone. I love how all this works. Have all this in a Funtana 125 with a 30cc gas engine.