Gerhardt--
In addition to the sources below, I have an Adobe Acrobat file (.pdf) I
downloaded (I don't remember where). It has the interface plus circuitry to
indicate the band the 706 is on. If you're interested, I'll email you a
copy.
73,
Larry N6TW
You need the CT-17 (or one you can build for considerably less money) to
convert the RS-232 signal levels to the TTL levels used by ICOM CI-V
interfaces. A circuit for doing this is in a QST article, Feb. 1992. The
circuit diagram is available on the WWW at
http://www.ambersoft.com/Amateur_Radio/Icom_Interface.jpg
A printed circuit board is available from Far Circuits at
http://www.cl.ais.net/farcir/modem1.htm
for $3.50US.
There is also as circuit diagram which has been used with an IC706 at
http://www.hamradio.cz/rigs/novaradia/icom/ic-q7/iface.gif
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