jsharkey
Well Known Member
I have an A210 with harness from Gulf Coast Avionics and have a couple of questions for anyone who has already made a successful installation.
There are Intercom switch and PTT switch leads. Do you need to activate the Intercom switch every time you want to talk or is it just for switching the intercom capability on and off? If you leave it on permanently will you be unable to transmit?
All of the switch, phones and mic leads are twisted pairs running in shields. At the radio end the blue and white cable of each pair is soldered to the shield. These are then daisy chained into two sets of three with the mics and PTT connected to Molex terminal 8 and the phones and Intercom switch connected to Molex terminal H. Both the RH and LH phones white wires are connected to terminal 7. After much study of the wiring diagram that came with the radio I believe that the two phones grounds should be connected to terminal 7 and the white wires to terminal H so I believe they are reversed. Also that the Intercom switch ground should be daisy chained into terminal 8 along with the mics and PTT and not with the phones. Can anyone confirm? Gulf Coast Avionics say that the harness was checked on a rig but it does not appear to be to plans. Perhaps both ground terminals are equivalent and they did what they did to even out the daisy chains. Does anyone else have experience with premade harness problems?
How should I terminate the shields at the far end? Solder the blue and white wire of the pair to the shield as per the radio end and pigtail to the appropriate jack or switch terminal?
Sorry for the long winded and detailed questions but someone out there has already done it.
Jim Sharkey
RV6 - Wiring
There are Intercom switch and PTT switch leads. Do you need to activate the Intercom switch every time you want to talk or is it just for switching the intercom capability on and off? If you leave it on permanently will you be unable to transmit?
All of the switch, phones and mic leads are twisted pairs running in shields. At the radio end the blue and white cable of each pair is soldered to the shield. These are then daisy chained into two sets of three with the mics and PTT connected to Molex terminal 8 and the phones and Intercom switch connected to Molex terminal H. Both the RH and LH phones white wires are connected to terminal 7. After much study of the wiring diagram that came with the radio I believe that the two phones grounds should be connected to terminal 7 and the white wires to terminal H so I believe they are reversed. Also that the Intercom switch ground should be daisy chained into terminal 8 along with the mics and PTT and not with the phones. Can anyone confirm? Gulf Coast Avionics say that the harness was checked on a rig but it does not appear to be to plans. Perhaps both ground terminals are equivalent and they did what they did to even out the daisy chains. Does anyone else have experience with premade harness problems?
How should I terminate the shields at the far end? Solder the blue and white wire of the pair to the shield as per the radio end and pigtail to the appropriate jack or switch terminal?
Sorry for the long winded and detailed questions but someone out there has already done it.
Jim Sharkey
RV6 - Wiring