Roy Smith wrote in message ...

I wouldn't waste any time or money trying to fix an ADF today.

My point exactly. Good money after bad IMHO.

My idea is to find a good used Apollo GX-50/GX-60 unit and replace the

I don't know how much a GX-60 will add to the value of the plane. True,
it is an IFR approach certified GPS, but it's also a generation out of
date and doesn't have much sex appeal anymore.

A basic 1979 C-172 is not a vehicle for sex appeal. I want no-frills
utility. A 172 with an IFR GPS is a much more marketable beast than
one without, regardless of the GPS in question.

My club has put in a mix of CNX-80's and GX-50/60's. The CNX is a much
more expensive unit, but it's also a much better box.

Would you put a 12k GPS install into a plane with a 172 with a 40k-ish
hull value? By the time you're done we're talking about nearly the
cost of an engine overhaul, which at 1800 tach hours may not be far
off. That will add a lot more back to the value, too. You can buy an
engine for the next guy but the avionics are for the current owner.

I guess it all
depends on how deep your wallet is.

Figure somewhere between mud-puddle and pothole. Quite frankly I might
just end up repairing that damn fool ADF for just that reason.

-cwk.