On Tuesday, March 5, 2013 12:44:27 PM UTC-5, Andy wrote:
Does the mod compensate for the filter loss or was it considered insignificant?

The loss is insignificant.
All boards were designed with a place for the filter just in case.
Good thing.
It really does work better !

Its a PITA because units are now (more) different for different
countries. Fortunately most USA pilots don't regularly move
their gliders between countries with differing freqs...

See ya, Dave "YO electric"