TS440S.15
  The IF-232 Interface from Kenwood is a 1488 and a 1489 chip in a box.
These are an RS-232 Quad Line Driver and Receiver and are available at
Radio Shack for $1.29 Each.  Here is an easy project that will save you
a lot over the $69+ Kenwood price  of the IF-232 Interface.  The 1488
needs a + and - supply. Unregulated + and - 12vdc is just fine. Get the
+5 vdc for the 1489 by putting a 7805 regulator on the +12 vdc supply.
100 ma. is about the max you'll draw, so the smallest transformer you
can find will still be plenty large.  Don't forget to series up two of
each gate to cancel the inversion that the 1480's produce.



ACC-1  Connector                  Use a 6 Pin DIN Connector.
                                         (Radio Shack $1.29)

Pin     Signal  Comments
________________________


1       Gnd     Signal Ground
2       TXD     Serial Data from Radio to Computer
3       RXD     Serial Data from Computer to Radio
4       CTS     Computer Ready;  (Radio Input)
5       RTS     Radio Ready;    (Radio Output)
6               No Connection

Pins 4 and 5 may be left Unconnected.

(MORE INFO ON THE TS440S IS AVAILABLE IN FILE NAMED TS440S.1 AND TS440S.2 - 
REQUEST THEM FROM THE SERVER)