[building a repeater out of two Kenwood TK-880]

Ok, I've verified active low keying. I've checked voltage on pins 3 and 7 of the ID-O-Matic. Pin 7 is COR input. I get about 3.2v on the line when the radio is not receiving. Voltage grounds out when it should. Pin 3 is PTT output. I get voltage drop to key the transmitter but it is not keying. So it sounds like the receiving radio and controller are working just fine. No?

 

I'm started reading that I could just make a RICK cable for these radios to just jumper across. 

[building a repeater out of two Kenwood TK-880]

Sorry, guess I need to check my notification settings. Just saw y'alls replies. I have not had a chance to look at it again. I will double check active low keying though. 

 

Steve this particular one will go in a permanent location. If it works, I'll build another in a go box. We have plans to create a battery system with solar panels and multiple outputs. 

[building a repeater out of two Kenwood TK-880]

Did you get it up and running? I have two TK880s and a Ham Gadgets ID-O-Matic III. I've run all the cable and wired it up but it's not transmitting. Something is wrong with my wiring.