bluesman

Hi Rick, thanks for your comment. I checked the manual and discovered that it is for a later model of the same transmitter I have. One of the differences being that Sony changed the input connector from Hirose to a 3.4mm jack and offered the option of a guitar lead into that jack. So I think I am trying to fit a square peg into a round hole and will go buy a purpose built wireless guitar system.

Thank you Daniel, I missed the fact that it was Jonne who originally posted - this IT thing is complicated for an old dog. I will take your advice and give the job of making the cable to a pro. Jonne, can you recommend the pin assignments?

Hi Daniel, This wiring diagram of the ECM77 could help me finish a long search. I've got a an old Sony Wireless mic set with a WRT805A transmitter. The transmitter has a 4pin Hirose bayonet connector. I want to plug my Fender Strat into the transmitter and hop to the amp via the wireless. I've looked around the net and found the right connector (also via this very knowledgeable site). I want to wire it correctly and as the ECM77 mic was included in the kit I bought, I believe that reverse engineering your pin outs on the microphone tells me the function of the pins of the input to the wireless transmitter. I am not an engineer and so I have two related questions 1. Can you recommend a pin assignment of the signal and gnd from the strat to the 4 pin input of the transmitter? 2. Can I ignore the bias pin? Thanks in advance for any help I can get, Richard.