tk-840

Hello. I have recently purchased 4 Kenwood TK-840 radios on ebay, I am able to program 3 of them but the 4th powers on and flashes "UNPROG" and I can not figure out how to get it to go into program mode from either the software or the radio itself. Any suggestions? Is the there a special key...

So, I bought a Kenwood TK-840(N) off eBay.. not sure at all what the N stands for, but I have downloaded the programming software, and DosBox. I plugged the programming cable into the radio, and plugged the USB into the PC. I changed the COM port from COM4 to COM2, as it only supports 1 and 2...

Hello All, Let me first start by saying I have very little knowledge of the radio world but am very interested in learning. I do have a pretty good grasp on computers and hope I can get the same grasp on radios. We have a fairly large trucking company where we have 70 Kenwood TK-840s in...