[aprssig] USB to Serial Converter

[Greg Clark]

I've been using this for lots of different devices, never failed, and
they're cheap.  Works on Windows Vista, and it appears that Prolific's
web-site has Windows 7 drivers.

http://www.buyextras.com/sausbsersadc.html

and the driver is here:

http://www.prolific.com.tw/eng/downloads.asp?ID=31

-- Greg