Jim (KC9HI):

Yes, the GT-3 is referenced, not CT.

The Prolific driver 3.3.2.105 dated 10/27/2008 works great on the GT-3

FTDI driver 2.8.30.0 dated 7/12/2013 does NOT work on the GT-3

Jim, the reason I use the FTDi cable and driver is that on my main HP DV7 Windows 7 laptop I use, It refuses to take the older Prolific drivers no matter what I do.  I originally had it working and something blew it away.  I have used several driver versions that “remove” the Prolific driver before re-installing, but no dice it would not install the older driver.  I once removed each driver file component by hand and got it working, but it got blown away again.  So I gave up and went to the FTDi series. I love the FTDI cables and drivers. Just disappointed the GT-3 does not work

David ND1Q

I assume that you meant GT-3.

Interesting. We usually recommend FTDI based programing cables to avoid

issues like this.

Please tell us which driver version does not work and which driver version

does.

Jim KC9HI