Build Your Own DCK-2 For The Kenwood R-5000

30 years late to the R-5000 party and in need of some accessories for the rig. I use a 12 volt power supply and battery system to run anything that will run on the desk, the idea is to have less power sucking transformers making heat and shortening the lives of some fine electronics. There is a Radio Shack Pro2004 scanner, a Yaesu VX7, the Internet router and a couple other items all tapped into the 12 volt system, see the web page for the Power Box Project for it's build & use.

The Kenwood R-5000 is a fine HF Shortwave receiver that I always wanted but never could get. I finally got one that needed help for a low price on Craigslist. It had the dreaded "dots" issue that rendered it useless. Not having the finer skills to trace and repair a 30 year old radio led me to send it off to see if it can be repaired. For a price just $20 less than the radio cost me, it was fixed at Technical Specialists in Florida. Highly recommend them, worth the cross country shipping for good work and detailed explanation of what was broke and the steps taken to remedy it.

Put those two paragraphs together and come up with "how to get the R-5000 to run on 12 volts?". Well, Kenwood did sell an add on kit called the DCK-2 for the radio, it's long out of stock, and if my hunches are correct expensive if one was found on eBay or the like. The Yahoo! Group for the R-5000 is the best source to begin looking for all things R-5000.  An article there sent me to Ken's Electronics where I ordered a socket, part # CBJ2B and a red/black power cord with fuse and matching plug, part #CBH2W. Cost with shipping was $11.99

Be aware, this is not a plug & play cord kit. One needs to do a little bit of fabricating to complete the assembly. The power cord is self explanatory. The socket half of this kit ends just south of the socket itself. I still needed to get about five inches of wire from the back panel to the header pins on the power supply circuit board.

Modder's creed says to do as little damage/cutting/desoldering as possible so that you can undo the mod with little left to tell that a modification was ever done. That eliminated soldering the wires to the two pins that were meant for an internal header plug or removing the pins and soldering the wires in their place. To the junkbox for a solution!

I dug through the collection of valuable but unused cords & sockets looking for a suitable socket. What I found is a PCIE power adaptor that came with a video card. This has two Molex sockets at one end and a PCIE power plug at the other. Same pin size as a 20 pin ATX power supply cord, two pins liberated from a dead power supply would also work.
Hijacked Plug

Some careful cutting away with a utility knife freed two usable pins. Trim enough insulation to solder on to.
two pins from power supply plug

Slide on some heatshrink and solder about 5 inches of wire to the pins
Added wire to pins

Solder the other ends to the CBJ2B. I insulated that end with heat shrink too.
Soldering wires to CBJ2B

The CBJ2B is an exact fit. Remove the blank that is held on with two screws, replace with the socket. The same screws go back in. Since the AC socket had the notch in the bottom I went along with the program.
CBJ2B in place

The wires with socket pins attached fit tight on the pins. Camera flash here blocks the + and - that is marked on the board. Heat shrink goes all the way to the end. Route the wires around the transformer and fini.
Wiring to power board

Now that it's on 12 volts it runs cooler, we can close it up and try and tune in some Radio Australia
Listening for a distant signal