Hi
Yesterday I got a new IC-7100 and I found the same as KB8U. The levels on the data signal is lowered from 0-3.3V to approximately 0-1V. I have also found the reason for it, ICOM has changed the hardware by adding a resistor which makes a voltage divider on the data output line. There are two ways to solve it.
1 .Remove the resistor, but it may void the Warranty.
2. I will make a level converter PCB which can be put in the socket instead of the read straping wires.
I need a few weeks to get the PCBs, but I will hurry up as much as possible.
I have asked ICOM about it, and I hope we will get information, telling us from what serial number this change was introduced.
73 de mike