Qyt Kt8900 Programming Cable Pinout Top [ 2026 Release ]

You have a mirrored pinout. Flipping the plug swaps pins 1 and 8. That means your cable is wired opposite: Pin 8 is GND. This is non-standard; re-crimp properly.

Even with the perfect physical connection, your software must match. In CHIRP: qyt kt8900 programming cable pinout top

In the official KT8900.exe software (only runs on Windows XP/7 32-bit): You have a mirrored pinout

In the QYT KT8900 pinout, Pin 2 is TX from the radio. That means it sends data to the PC. Therefore, it must connect to the RX pin on your USB adapter. Similarly, Pin 3 (RX on the radio) connects to TX on the adapter. In the official KT8900

If you connect TX→TX and RX→RX, you will get nothing but timeouts.