Jon Kraus wrote:

As stated earlier we are looking to replace our KX-170B (our 2nd
NAV/COM). As I was doing some research I stumbled across the TKM MX-170
http://www.avionix.com/rev-tkm.html

Check the Macoy MAC1700 which is also a slidein replacement (actually it
replaces the analog front panel with a digital one). Much more user
friendly for memory recalls...

http://www.esscoaircraft.com/product_p/1964.htm
http://www.trade-a-plane.com/unprote...pec29173_4.jpg

I've used the Mac and the TKM with good results in 3 different planes.
Recently searched for a cheap MX-12 for another plane unsuccessfully...