I have the schematic. Not sure how to send it.Just an update to this:
I just got off the phone with Eric @Palomar , and had a nice chat.
He told me the supplier that was making the SL-41 Microphone (and the Magnum 1 radio) has gone away. They have the parts too, but no one to build them at the moment... but I too am now on the waiting list (along with several others, he mentioned)
Any chance one of you guy with this microphone could draw out a schematic?