Truth about Programming Cables

Most Frequent Question

Whether Analog or Digital, one of the most frequent issues experienced by new handheld owners involves their programming cables. I can only imagine how many radios are sitting in desk drawers because of programming issues. The issue in many cases isn't the software, but rather the incompatibility of programming cables.

Physical Design

I'm not referring to driver issues, but the actual appearance of the cable. A very common design of the 2 pin style cable is the Kenwood K1 shown here.

There are several wiring issues to consider.

- Not all cables are wired with the same pin out.
- Not all cables have the UART chips in the cable
- Even cables that are 'straight through' may still not be wired the same.

I currently have several cables that look the same, USB on one end and 2 pin K1 on the other, but all different..

UART Chip Drivers

A very common issue involves the cable's programming chip. Many inexpensive K1 style programming cables use clones of outdated Prolific chips. When the cable is inserted in the USB port, Windows will load the latest driver. Unfortunately this will not be compatible with the older chip. You will need to install a backdated driver for your cable to properly function.
The needed driver can be found at Miklor Drivers.

There are also two Plug-n-Play options that can also be considered for radios such as Baofeng, Retevis, BTech and several others.

- One is purchasing a cable with an FTDI UART chip.
     $20, but totally trouble free.
- Purchasing RT Systems programming software and cable.
     $50, but includes custom software for your specific radio.

In either case, be sure to order the cable for your specific model.

Error Messages

There's also a third possibility. You may have right cable, but it may not be making contact with the radio's internal connector. If this occurs, there are error messages that may appear. To help with this diagnosis, refer to Error Messages.

Build Your Own Cable

Here's another option to consider. This project uses your old problem cable and describes how to replace the internal chip for less than $5. Miklor Cable Project

So pull that radio out of the drawer and give it one more chance. Don't blame the radio or the software yet. The issue might just be the wrong or 'bargain' cable.

Enjoy your new toys...

Amazon:     FTDI Cable