Opt for a USB-to-TTL adapter featuring a genuine FTDI or CP2102 chipset. These chipsets have highly stable Windows, Mac, and Linux drivers, avoiding the driver errors common with counterfeit Prolific (PL2303) chips.
When looking for the "top" pinout, we are referring to the orientation where the cable connector is inserted into the radio’s accessory port (speaker/mic jack) with the retaining screw facing away from you.
If your cable is not working, check the driver (especially on Windows 10/11, which may need older Prolific drivers) and verify TX/RX orientation. qyt kt8900 programming cable pinout top
Pins:
: Opt for a board carrying an FTDI (FT232RL) or a Silicon Labs CP2102 chipset. Avoid generic Prolific (PL2303) chips, as counterfeit versions are plagued by driver failures on Windows 11. Opt for a USB-to-TTL adapter featuring a genuine
Turn on the radio's volume knob to power the device.
By following this guide, you should be able to create a working KT8900 programming cable and connect your radio to your computer. Happy programming! If your cable is not working, check the
: If CHIRP fails, the official QYT programming software is a reliable alternative, though it may require specific COM port settings (typically COM3 or higher). Troubleshooting Common Issues
A board using a stable chipset like the CH340N Module or an FTDI FT232RL chip.
If you are building your own cable from scratch, you will need:
: Due to the recessed design of the radio's rear port, some generic 3.5mm plugs with thick plastic housings may not seat deeply enough; a slim-housed connector is often required.