Hi all,
I seem to remember someone mentioning using an encoder instead of the up/down buttons. It may be possible to use this module but I haven't tried it myself. Just thought I would mention it in case anyone was interested. I think the outputs would be connected across the switch contacts.
Martin.
http://diy4fun.blogspot.com.au/2010/01/rotary-encoder-for-ats-transceiver.htmlMessage
Replacing up down buttons
2013-03-27 by cyllall