You would want Rx audio from 2 and 7, Tx audio in on 4 and 8, solder bead D in the radio.
I dont recall if there is a VOX option in the radio. If the intercom is full duplex, how will you key up the radio (PTT)? DB9 1 Dimmer in 2 De-Emph Audio Out (affected by Vol Pot) 3 Discriminators Audio (Un Squelched) 4 Tx Mod In 5 PTT in 6 COR out (probably need a pull up resistor) 7 Ground 8 Ground 9 Ground Pin 2 - You can set a minimum level via Set Mode Pin 4 - Tx freq response. Solder bead F for data, solder bead D for audio Pin 5 - Enable external PTT via software. Common>Expert>EPTT Pin 6 - Enable COR via software. Disable the 2/5 tone function for the selected channel. Common>Expert> RX EXO to ON, and delay timer to OFF Pinout info on page 16 at http://www.repeater-builder.com/icom/pdfs/icom-ic-f111-f121-f211-f221.pdf Duane AB8QU On 7/13/2010 10:28 PM, ryan_151 wrote: > im trying to use the OPC-617 cable with an Icom f121 radio to connect it to > an intercom and need to know how what pins to use to connect my mic+- audio > into the F121 radio and the f121 radio audio out +-. Any help with this woud > be great, Thanks
