The filter is on a small board because the pinout doesn't match the board layout. The circuit you mentioned is simply blocking caps to keep DC off the filter. There should be two short pieces of coax that go to the IF board in the radio. Just connect them up. Did I mention you have to remove the stock filter?? Clif Holland, KA5IPF www.avvid.com ----- Original Message ----- From: "joe sloss" <k7mks at comcast.net> To: <kenwood at mailman.qth.net> Sent: Sunday, August 22, 2004 12:42 PM Subject: [Kenwood] Fox Tangol Filter Does anyone have any info on older Fox Tango 88H21 filter as would apply to a TS-820S. This is a solder-in unit with a small circuit board with equalizing components. Thanks. Joe k7mks _______________________________________________ Kenwood mailing list Kenwood at mailman.qth.net http://mailman.qth.net/mailman/listinfo/kenwood Help: http://mailman.qth.net/subscribers.htm