I am in the process of building a repeater using two M120 radios. I would like to build my own interface cable and looking for a schematic diagram. What I need to know is the value of the trim pot to adjust the level of the audio going to the Tx Radio and to adjust the squelch tail. This cable assembly can be purchased from Ebay, but I don't want to buy something that is very simple to build.
Thanks, Romy
