Hi When I install the filter to the Yaesu MP makes a QRM (Noise) of 3 or 4 db, when removing the filter noise disappears. Someone can give me an explanation? Thanks and 73’ Alfredo Vélez WP3C Web: http://www.wp3c.qth.com email: mailto:wp3c at aol.com WP3C DX Cluster Node: telnet://wp3c.hopto.org