I purchased a KUSB cable and downloaded the latest driver (v2.0.4.102) from the Prolific website, as directed on the Electraft website, for my K3.
Although the Elecraft Utility program worked perfectly, and I found that full rig-control worked in Logger32 but with CPU running at 100% constantly. Obviously this was a problem as the pc slowed to a crawl. PC is 2.2 Ghz with 1.5Gb ram. Running other logging software (Wintest, HRD) was fine with no addition CPU loading. Only Logger32 displayed this 100% CPU payload. To further test, I installed the prolific usb-serial driver onto 2 other XP laptops. One was brand new out the box and all 3 had different Anti Virus packages. The exact same poor behaviour was found on both as on the original XP Home desktop.
The resolution was to uninstall the USB-Serial driver and install an older Prolific driver (v2.0.2.8) which resolved the issue. Link below.
http://www.prolific.com.tw/support/files//IO%20Cable/PL-2303HX/Drivers/Generic/wd_pl2303_v20019v2028.zipI'm not sure how many are using Logger32 but this driver may be causing issues for others?
Thought I would share this in case it helps someone.
73's
de Gordon
MM0GPZ
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