If you need to easily connect the PC to the remoterig and IC7100 follow the instructions below.
INSTRUCTIONS
I spent a lot of times looking for a cheap solution for connecting the frontal part of the ic7100 + remoterig to the pc in order to work with the digital mode.
My tested solution consists in using an usb external soundcard (I avoided to use the native pc soundcard but it is not forbidden) and a connector that can be directly plugged in the microphone plug of the frontal part of the IC7100.
I tried other three cheap usb devices but the results wasn’t good for all of them. I finally bought this USB external Sound Adapter from Amazon – Sabrent ASIN: B00OJ5AV8I. I suppose that more expensive is even better (wide sound dynamic and a better S/N ratio) but as a first stage this can be a good choice.
You need also two 3.5mm audio jack (mono) and an rj45 male connector. You can also avoid to crimp the rj45 connector just using a ready ethernet cable cutting away one of the two connector and using the scheme below:
6 —> Capacitor (4,7uF 50V) in series to protect the radio from continuous voltage —> central signal pin of the mono “OUT” jack –> Sound Board MIC IN
5 —> Ground signal “OUT” jack —> sound board MIC IN
3 —> central signal pin of the “IN” jack –> sound board OUT (EARPHONES)
7 —-> Ground signal “IN” jack —> sound board OUT (EARPHONES)
In the radio menu you should select “MIC AF Out” item to “ON” in “Function” Set mode. (p. 17-22 of ICOM 7100 manual)
I also suggest to switch off the speaker output. Take care to do not zeroed the volume beacuse it will be used to regulate the input level to the PC.
After you should start trying to regulate properly the sound card level in the PC menu. It is different case by case.
I used the DM-780 in the Ham Radio Deluxe without any problem. I do not test other softwares but in theory they should work correctly.
In the next article the CAT connector for remote radio controlling trought the remoterig