T J, This is a common problem. The MICOR receiver was desgined with the PL decoder over riding and forcing the UNmuting of the audio. Resulting in very long 'squelch tails'. There is a jumper configuration for the AND squelch function in the manual.
Jumpers on the Audio Control Module: JU1 OUT for AND squelch JU4 OUT JU11 IN C37 OUT Jumpers on Tone PL Decoder board: Should be no changes. "kc8lts" <[EMAIL PROTECTED]> wrote: >The problem is that the receiver > only has the PL holding it closed, no squelch control. Then when >the PL gets falsed I get a lot of static noise floor across the >repeater till the PL finally calms down and shuts the receiver off.

