TS-680 (in Japan), TS140 (other contries) Serial Interface

I explain the result in the attempt of Kenwood TS-680 (in Japan), TS140, TS-140 (other contries) serial interface connection.

The IF10C(PX) Serial interface (for RS-232C) is available in following URL.

http://www.piexx.com/index.php?main_page=product_info&cPath=7&products_id=21

 It's easy to modify your transceiver, and remote controle using
Ham Radio Deluxe.
 But, it's difficult to read S meter information because of the analog output indication.