[Elecraft] XFIL on K3

[Keith Trinity WE6R]

A hidden feature if you you want to toggle thought ALL filter slots, 
even if they are empty or not selected for the current Mode!
*Go into any config menu starting with FL  (except for FLTX);  (IE "FLx 
BW", or "FLx FRQ" or "FLx GN" or "FLx ON")
Then while in that menu, tap 6/XFIL, and it will got rotate though *ALL* 
the slots.
This is good to see if you have a filter or not in a slot.
Also good to use if you want to use the AM filter on FM if you have 
adjacent channel interference.
Or force a filter on a mode that is not selected.
Keith WE6R