Stu,Spray a little Deoxit on your mic plugs. Swab some on the contacts of the mic input connectors.Good chance the connectors are zinc plated and tarnished. Frank WA1GFZ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20180313/621f463a/attachment.html>