I am building a radioless node using the RL-20 interface, Ras pi 3, Alinco mic. I have it wired as follows: From mic to interface: Pin 1( mic) is going to pin 6 on interface, Pin 2 (PTT) to pin 3 COS on interface. 3&4 not used. Pin 5 (+5v) going to pin 9 on interface. I jumped the wire on the board as instructed to get the power to that pin. Pins 7&8 are going to ground Pin 8 on the interface. I have tested and the +v is making it to the mic.
The problem is I have no audio from the mic. I connected the node to another one of my nodes for testing. It connects fine and I have good receive audio. I just have no transmit audio. I have tried three different microphones. This is probably going to be something simple but I can’t figure it out. Someone has had to have built one of these as I see a few on the net but with little instructions.
To clarify, because I have seen this before, This is not a HUB node. It is a pi with interface and a microphone. No radio involved.