Having a lot of reluctance to part with $ 43 dollars for a simple mic extension for the 400, and looking at the RJ connector with a magnifier, it seems they are using a 4 wire (I could be wrong) system. If I was sure, I could make my own since I already own the tools to do it.
I went through this with another brand radio and ended up using standard off the shelf pass through RF extension cables with the same number of pins. You don’t need to know pinouts because you are passing everything straight through.
You can make your own mic extension using a 6P6C flat phone cable extension and a double female coupler. Usually less than $10 on-line and works FB. (Use a flat cable to minimize any crosstalk.)
As long as you wire the two jacks the same why would you need the diagram.
Aren't you just passing pin 1 to pin 1 etc??
Aren't you just passing pin 1 to pin 1 etc??
