Your right i did solder the d and f at the same time. The intercom is a Flightcom 403mc. Ive talked to a few people and it seems the inpedance in my intercom and radio might not match and i need to find out how to change it so they match. this is all new learning for me!
--- In Repeater-Builder@yahoogroups.com, Duane Hall <du...@...> wrote: > > > > "I soldered the "f" and "D" bead and sill wont work..." I assume you meant > you tried soldering D and F, but not both at the same time. Both at once is > invalid, and maybe could cause the no tx audio. > > Maybe there is mic bias voltage on pin 4, and you are loading it down, > causing the loss of tx audio. Try putting a capacitor in line. > > No Rx audio either? Tx and Rx reversed? Does the intercom require a COR > input? > > What model intercom do you have? > > > Duane > > On 7/26/2010 2:06 AM, ryan_151 wrote: > > I soldered the "f" and "D" bead and sill wont work,got the PTT to work but > > i still cant get any audio to transmit or recieve through the OPC-617 > > cable, i even took the mic out if my david clark head set connected it > > straight to the pin 4 and 8 and it still wont transmit my voice. > > > > > > --- In Repeater-Builder@yahoogroups.com, Duane Hall<duane@> wrote: > >> 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 Discriminator 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 >
