I just installed a Windows 10 Update, and even before rebooting to complete the install, I noticed that Windows had reset all my Elecraft FTDI virtual COM port settings back to the (bad) FTDI defaults, which means your PC can key your radio about 7 or 8 times every time Windows restarts or the USB cable is connected, assuming *CONFIG:PTT-KEY* is set to *RTS-DTR* in a K3, or *MENU:Serial, USB-PC1* or* USB-PC2 DTR/RTS* is set to *CW* or *PTT* in a K4, to support computer-generated CW and PTT.
To prevent this unwanted radio keying by Windows, while still being able to use computer-generated CW and PTT on these COM port pins, do this for every FTDI port: 1. Open Windows Device Manager 2. Expand *Ports* section 3. Right click on Elecraft virtual COM port(s) 4. *Properties* 5. *Port Settings* tab 6. *Advanced* Button 7. Make sure *Serial Enumerator* is NOT checked 8. Make sure *Disable Modem Ctrl At Startup* *is checked* 9. Click *OK* More details with screenshots in this updated presentation linked from my QRZ.COM page <https://www.qrz.com/db/n6tv>: - Everything You Need to Know About USB and Serial Interfaces <https://bit.ly/USBserial2021>, updated for 2021 See slides 26, 27, and 28. I've just updated this presentation (today) with a few new slides showing on how to avoid the same unwanted keying issue when using legacy serial ports like COM1: and COM2: (slides 29 to 33), and one new K4 Menu screenshot (slide 52). 73, Bob, N6TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
