<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1520898842631_12060">Stu,</div><div id="yui_3_16_0_ym19_1_1520898842631_12060" dir="ltr">Spray a little Deoxit on your mic plugs. Swab some on the contacts of the mic input connectors.</div><div id="yui_3_16_0_ym19_1_1520898842631_12060" dir="ltr">Good chance the connectors are zinc plated and tarnished. Frank WA1GFZ</div></div></body></html>