[Elecraft] Filters for K3

[Frank Krozel]

On weekends here in the Midwest there are many AM nets (as well as the normal 3.880 Nets) that I like to listen to.
I am curious as a CW guy, I would like to not take away from my already compliment of filters, 500, 200Hz to put in 6 and 13kHz filters, thinking of adding just the 13kHz filter.   I also do 52.525.
How would the 13kHz filter work for listening to AM?  I assume I can start with that filter and use the variable to neck it down?  Most of the signals are above S-9 that I listen to.
de KG9H, Frank