A few observations from someone who has installed both KN63 & KN62a (KN64)
The KN62 is never a stand alone unit, as it needs something to display the data and something to tell it what to display you must connect it to at least one NAV box and preferably two NAV boxes.
If you want it displayed on a G500 you have to have a GA43e , Installing both the GA42e & connecting to both the NAV boxes is not a trivial task but in my view if you intend to keep the aircraft long term is the way to go as the other option is to use the KDI572. As Peter says above these units have issues with the display and getting this fixed costs almost as much as the GA34e…….. so if you are in for the long haul the GA42e is a more reliable and cheaper solution.
If you have the panel space the KN62a is an option, you could cheapskate and just fit the box and connect it to the audio but this will result in you not having the remote frequency feature . The KN62a & KN64 also don’t have the strobe output that is compatible with Garmin transponders so there is a possibility of interference with other L band equipment. Also these units suffer from a shortage of spare displays and eventually you will need a display replacment.
As always a good installation is not cheap and a cheap installation is not good.
