This write up is on an installation of a Kenwood TM-V71A Dual Band VHF & UHF mobile amateur radio into a Dodge Nitro SUV. The Kenwood TM-V71A radio is a modern radio with remote control head capability. Technically a remote head kit available from Kenwood is required to take advantage of this feature, but in reality this isn’t true. The remote kit certainly will make your installation easier. The kit would include a adapter and bracket to attach the head to and the specialized cables to hook the head to the body. The basic remote kit only includes an extended cable for the head to radio, no extension for mic to radio. There is an extended remote kit available that I believe has the basics, plus a extended mic and power cable adapters.
With that said, here is how I did it. If you take a look at the small cable that hooks the remote head to the body when they are hooked together you will see that one end is a RJ-45connector(standard ethernet connection) and the other end is a slim RJ-12 connector. Similar to a telephone line(same wiring), but about 1/4 thinner. Then at the termination of the mic cable you’ll see that the connection is also a RJ-45 connector. These two RJ-45 connections are standard size. So to extend this to connections I acquired two RJ-45 male to male couplers, as scene in figure 1.
I should mention I looked for a couple days for this special RJ-12 cable with no luck. I could have fabricated something up, but my method is easier.
To complete all these extended connections here’s what you will need:
- 2x RJ-45 couplers
- 2x Ethernet Cables(for efficiency’s sake, short as possible)
- 2x Ferrite Choke(Optional)
Step 1. Plug a coupler onto each ethernet cable
Step 2. Plug an ethernet cable into the head and into the microphone plug
Step 3. Plug the appropriate end of the include head wire into your extension
Step 4. Make your mic connections
Now this is an optional step but in the kit you can see that cable has a ferrite choke to keep RF emissions traveling down your remote cable. I ordered two from Mouser. I’m going to do it.
***Found these specifically fitted for CAT5 cable***