These devices are 25 bux in my latest Mouser catalogue. Scott, the Icom CI-V bus requires open collector drivers, since multiple devices - a transceiver, and the PC interface - can simultaneously attempt to pull the bus in opposite directions. You might want to consider sending that in to QST for a 'Hints and Kinks' article.
I looked for a converter using one of the FTDI chips so that I could use their XP certified drivers and all the problems went away. I've had problems with the non-certified XP drivers for some other USB/Serial converters making Windows unstable.
I might add FTDI offers Microsoft certified WindowsXP virtual com port drivers for their chips. Both articles bear reading by those folks who want to control their interfacable transceivers with modern computers. There is a siimilar article published in the May/June issue of QEX.
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