Here is what I found about my K3 100W, with the KBPF3 General coverage band-pass filter array and the AM filter installed. The AM radio coverage fair on the upper end and noisy on the lower freq.'s.
So I installed the KXV3 RF I/O module as directed by Elecraft personnel.
Now the sound is excellent on both the #1 and #2 antenna's when connected to the KXV3 BNC connector RX ANT in.
How ever when connected to a inside AM antenna I receive hardly any audio.
Elecraft personnel have suggested a LOOP antenna, home made which he uses on his K3 and works great.
I do not have time to make one so I have purchased one on line and am awaiting it's arrival to give it a try.
If you are not familiar with a LOOP antenna google it and see the demos and how it is used.
I am hoping for the best, good luck to yall.
Duane
w6ddr
[hidden email]