[Elecraft] K3, using AM Mode RX with 250 Hz filter

[Keith Trinity WE6R]

Try using the K3 Utility to re-label the .250 to a different value, like 
6K, make sure it has a checkmark for AM.
Or try disabling the other slots by maybe just unchecking any that have 
AM checkboxes.
Experiment with that, you should be able to have it stay on the .250 and 
still be able to use WIDTH.
(Take a picture of your original setup first for restoration)
Keith WE6R Elecraft K3/K4 Tech