USB to serial adapter- not all work proper

Are you using a usb to serial adapter as I do ? Than you probably use one from the Profilic company which are most common. I tried to connect my Elecraft K3 with such a usb to serial adapter and had trouble with the CAT connection using OMNI RIG. I have in my shack two from the company and only one is working fine – the other one hangs up and stops responding. Searching the INTERNET I found out that there a many different chips sets used by Profilic. To find out you can use a tool by them called „PL2303 CheckChipVersion tool program (checkChipVersion_v1006). Now to the point I found out: the one working has a chip labeled „PL-2303 XA/HXA“ and the one  not working has a chip labeled „PL-2303 RA“ which is the low cost version. So if you buy one pay attention you have the „XA/HXA chip“ inside. Also and  only for them you might get drivers for windows 8  + Windows 10.

Update January 2018:
For Windows 10 if you have already installed a driver and it is not working first uninstall it, plug off the adapter, install THIS DRIVER [ download driver] and plug in again the adapter – that should work with Win10 for 100%.



Name is Erwin Witt, born 1962, working as technical service engineer in environmental test systems business. Ham radio hobby since 1980, main interests are VHF and EME operating.