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.
If you have an old USB-to-TTL adapter board or a spare Baofeng handheld programming cable lying around, you can easily adapt or rewire it for your 1. Components Needed
: If your PC shows a "Code 10" error in Device Manager, you likely have a cable with a counterfeit Prolific chip. Reverting to an older driver (version 3.2.0.0 from 2008) often fixes this.
: The lower ring on some factory batches outputs raw DC voltage to power external hand mics. Shorting this to ground or data lines will destroy your USB adapter or blow an internal fuse in the QYT KT-8900. 💻 Software and Driver Setup
NC (Not Connected) or PTT in some setups, usually not used for programming. SLEEVE: GND (Ground)
Are you building a cable from scratch using an , or repairing an existing factory cable ?
You must either manually roll back your device driver to an older, legacy Prolific driver profile (Version 3.2.0.0 from 2007) or use a cable with a genuine CH340 or FTDI chipset, which handles plug-and-play functionality seamlessly across all modern versions of Windows and Linux. Software Integration: CHIRP vs. Factory Software
Solder the (Radio GND) to the GND pin of the USB board. Step-by-Step Computer Connection Sequence
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.
If you have an old USB-to-TTL adapter board or a spare Baofeng handheld programming cable lying around, you can easily adapt or rewire it for your 1. Components Needed
: If your PC shows a "Code 10" error in Device Manager, you likely have a cable with a counterfeit Prolific chip. Reverting to an older driver (version 3.2.0.0 from 2008) often fixes this. qyt kt8900 programming cable pinout top
: The lower ring on some factory batches outputs raw DC voltage to power external hand mics. Shorting this to ground or data lines will destroy your USB adapter or blow an internal fuse in the QYT KT-8900. 💻 Software and Driver Setup
NC (Not Connected) or PTT in some setups, usually not used for programming. SLEEVE: GND (Ground) Solder the to the GND pad on your USB-TTL adapter
Are you building a cable from scratch using an , or repairing an existing factory cable ?
You must either manually roll back your device driver to an older, legacy Prolific driver profile (Version 3.2.0.0 from 2007) or use a cable with a genuine CH340 or FTDI chipset, which handles plug-and-play functionality seamlessly across all modern versions of Windows and Linux. Software Integration: CHIRP vs. Factory Software If you have an old USB-to-TTL adapter board
Solder the (Radio GND) to the GND pin of the USB board. Step-by-Step Computer Connection Sequence