WE DO NOT ALLOW/SUPPORT THE DOWNLOAD OF COPYRIGHTED MATERIAL!
The programming cable uses a single 3.5mm TRS (Tip-Ring-Sleeve) stereo-style plug to interface with the radio's data port. While often sold with a Prolific-based USB converter, reviews frequently highlight compatibility issues with modern operating systems . Pinout Specifications
Solder the to the GND pad on your USB-TTL adapter. Solder the Tip wire to the TXD pad on the board. Solder the Ring wire to the RXD pad on the board.
: Ensure your computer recognizes your USB-to-TTL chip. FTDI chips generally install automatically, while CH340 or Prolific chips may require manual driver installation from the manufacturer's website.
The programming cables for the KT series (KT-8900, KT-8900D, KT-9900, WP-12) are universal and generally interchangeable. Driver Issues: qyt kt8900 programming cable pinout top
To program this radio efficiently with or the official QYT software, you need a USB programming cable (often a FTDI or Prolific-based cable) .
Strip the wire ends and apply a small layer of solder paste/tin to the bare copper.
Many users miswire their cable because they look at the radio's RJ-45 socket incorrectly. To find pin 1 on the : The programming cable uses a single 3
: The radio is compatible with the official QYT KT-8900 software or the community-standard CHIRP .
Pins 2 and 3 are sometimes swapped in counterfeit or homemade cables. If your software says "Radio not found," reverse pins 2 and 3.
The is a specific, non-standard wiring configuration that uses Pins 3, 5, and 6 of the front-panel RJ-45 jack. Understanding the difference between the radio’s TXD (Pin 3) and RXD (Pin 6) is the key to building a functional cable. Whether you choose to repair a broken factory cable or assemble your own from scratch, following the pinout table and cross-wiring rules above will save you hours of frustration. Solder the Tip wire to the TXD pad on the board
A board using a stable chipset like the CH340N Module or an FTDI FT232RL chip.
If using an FTDI chip, Windows Update typically installs the correct VCP (Virtual COM Port) drivers automatically. For CH340 chips, manually download and execute the official OEM driver installer.
Unlike many handheld ham radios that rely on a dual-prong Kenwood-style connector, or larger mobile rigs that use an RJ-45 microphone jack for data, the QYT KT-8900
If using Windows 11, Prolific chips may show as "unsupported." Search for a "CH340" chipset cable instead.
While programming usually happens via the 3.5mm jack, the front RJ45 microphone port
Features