The COM11A is acceptable under the FCC stability rules.
http://wireless.fcc.gov/services/index.htm?job=service_home&id=aircraft_stations
All I know about it is that when Tom Downey asks a simple question we all end up learning something.
....
I simply didn't know, nether did my favorite radio shop.
of course he sells radios,
It says more about the radio, Av shops don't see them.That says ALOT about that radio shop.
It says more about the radio, Av shops don't see them.
Who said anything about Garmin?Only ones that live a very sheltered life. The two shops I use have piles of these historical pieces and the FCC frequency tolerance issue ought to be well known and frankly took about 5 seconds of google to dig up the reference at the FCC site.
If you have a shop who thinks that Garmin is the only manufacturer out there, perhaps you should avoid them on classic aircraft.