- DIY YAESU PROGRAMMING CABLE HOW TO
- DIY YAESU PROGRAMMING CABLE SERIAL
- DIY YAESU PROGRAMMING CABLE DRIVERS
- DIY YAESU PROGRAMMING CABLE SOFTWARE
- DIY YAESU PROGRAMMING CABLE DOWNLOAD
This acts as a pullup for the TX and RX lines. I found several different circuit schematics for Yaesu cables and one on showed the 1N4148 diode connected between the DATA input from the radio and the TX pin but the 10K resistor was connected between DATA and the 3.3 volt pin. This was supposed to allow the TX pin to pull low for sending data but was not functioning correctly. The radio uses the same pin on the connector for sending and receiving data the TX pin on the FT232R had a 1N4148 diode with a 10K resistor in parallel between the TX and RX pins.
DIY YAESU PROGRAMMING CABLE DOWNLOAD
We changed the zero ohm resistor to the 3.3 volt pads and using Putty on the computer showed that the computer was now able to read the initialise data from the radio but sending data from the computer was still not working so we couldn’t download or upload data to the computer. The circuit had the TX and RX in the 5V mode, and the PCB had a zero-ohm resistor for selecting the 5 volt or 3.3 volt levels. The FT232R has a pin called VCCIO (pin 4) and this sets the data voltage level and it can be powered by the 5V VCC to set 5V TX and RX levels or can be connected to pin 17 which is 3V3OUT to set the TX and RX levels to 3.3 volts. With the USB connector disconnected showed that the radio was sending a 3 Volt signal to the board.
DIY YAESU PROGRAMMING CABLE SERIAL
Data Format and SpeedsĬonnecting our Mixed Signal Oscilloscope to the cables going to the radio and setting it to Serial Data mode showed that the USB circuit was sending serial data at 19200 baud and at 5V levels. The PCB was held in place using hot melt glue which was easily removed. Removing the cover reveals the PCB with a FT232R USB UART IC, surface mount components with a 1N4148 diode and a 10K resistor across the TX and RX pins. The USB connector is fitted to a small PCB in a plastic enclosure which easily came apart with a small amount of pressure on each side and is made of two plastic sides which had a small amount of glue holding them together. I was not sure if the connection to the radio was the problem so we removed the threaded portion of the plug using the lathe so we could try inserting the connector at different depths but this did not resolve the issue so the problem appeared to be in the USB end with the FTDI chip and circuit. The Yaesu VX-6 uses a 4 way 3.5mm plug which screws into a recessed socket on the top of the radio.
DIY YAESU PROGRAMMING CABLE SOFTWARE
When connecting the cable to the radio and computer it would show as an FTDI USB-Serial interface, but the radio and software refused to communicate. Please let me know if this cable works also with other transceivers than those mentioned above.Last week I purchased a Yaesu VX-6 is which is an ultra-rugged 144-430 MHz FM Hand-Held with wide receiver coverage of 504kHz to 998.99MHz.Īs programming the radios via the keypad is very time consuming, I purchased a USB data cable from a UK seller on eBay and it arrived a few days later.
DIY YAESU PROGRAMMING CABLE DRIVERS
This project may be realized also using a Prolific 2303, of course running the risk of encountering drivers troubles with latest releases of Windows. So, the cable works also using other resistors than 10K, but with a flaw requiring attention. Nevertheless, if the radio was off when the cable was plugged in and then it was switched on holding the key to enter in the clone mode, the undesired transmission did not happen, and the data were read and written perfectly. One specimen of cable built exactly as specified worked perfectly and allowed CHIRP to read from and to write to a FT-8900R without any trouble.Īnother specimen built using a 22 K resistor instead of the proper 10 K one, when plugged to the radio let it transmit.
DIY YAESU PROGRAMMING CABLE HOW TO
The VK4GHZ picture shows beautifully how to solder the data and the gnd lead to the mini-din plug (view from the solderings side). The connector to use is a 6 pin mini DIN. Here is the schematic of a Yaesu FT-7800-7900-8100-8800-8900 program cable using a simple and cheap CP2102. In one of his articles, VK4GHZ described how to make an adapter between the Icom CV-I USB interface and the Yaesu FT-7800R and other transceivers adopting the same program cable. But if I switch the transceiver on while pressing the keys to enter the setup mode, so to go to setup mode at power on immediately, the cable works perfectly. If I connect it to the radio and I switch the transceiver on, the radio transmits. Notice: This is perhaps NOT the proper FT-7900 cable.
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