Thanks for your comments.

Paul - the exact model is an AK 350, but it was manufactured much more recently than yours. I have been on this earth long enough to know that not all production runs create products of equal quality - sometimes a vendor will change manufacturer - I have no idea if that is a possible factor on not in the case of the King unit I happen to be using.

John - you bring up an interesting point - I am dragging my feet on the ADS-B deal because of all the turmoil out there in the market at this point...I want to see both the market and FAA get real about this before I go and jeopardize my children's inheritance; but..... it sounds like a person would be wise to get a unit with the RS 232 9 pin serial port, otherwise when the time comes with an ADS-B Installation, the encoder would be worthless anyway if a person required ADS-B - correct?

Dave S
KF7 Trigear