Hi Mike, Jerry, I have a unitrac 2003. I worked fine on my Dell desktop with XP using NOVA and G5500 rotors. I had some issues with the computer so I upgraded new HP with Windows 7. The controller would not work. I emailed John G3BVU/W1. This is part of his reply: ( /As you have discovered U-2000 (and U-2003) are not 64-bit programmes. And there's no hope of getting them up-dated to 64 bits. // // I too love U-2000. Although we have been selling U-2003 for several years, I still have U-2000 in my personal tracking system. I like 2000 much better than 2003. I too use NOVA to drive it. /) My old Dell with XP was 32 bit and the new HP with win 7 is 64 bit only. I now use SatPC32 with LVB tracker and same antennae rotors.

Hope this may shed some light on the questions.

73, Dale KL7XJ On 3/18/2014 10:45 PM, K5OE wrote:

Mike, I have the same combo and tried a Win 7 machine (laptop) with a USB-to-Parallel adapter to no avail (I'm neither a PC guru nor patient). I gave up and just keep a legacy machine running XP for this controller. It has worked reliably since I bought it more than a decade ago. 73, Jerry, M0GOE

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Greetings,

I'm still running a Uni-Trac Parallel port interface with ZL2AMD's Uni-Trac 3.0.b software on Windows XP to control a Yaesu G5400B. Yes its old, and yes, it works fine. It even has DDE capability to run it from SATPC32, which is credited to DK1TB (Erich - SATPC32 Author).

Question, is there anyone out there using this tracker on an O/S later/other than Windows XP ?

(If so, I'd be interested in the details)