I have bought an AKG WMS 40 (Instrument) kit which comes with the PT 40 bodypack transmitter. This has a mini XLR socket. I am trying to use it with a spare headset mic that had a 3.5mm mono connector (until I cut it off). I have soldered on a 3-pin mini XLR with ground to pin 1 and the signal to pins 2 and 3 shorted. This is how the AKG service manual explains their mics to be wired.
I get no sound from the mic (which does work with my Tascam DR-05 recorder) when using the transmitter, and I have tested the transmitter with a line level source using the included cable in the kit.
I get an odd effect where, if I turn it up very loud, I can hear any touching and general handling of the microphone or headset but the actual sound is not transmitted if I speak or even shout into it.