In a message dated 12/18/2006 6:33:19 A.M. Central Standard Time, volim63 at gte.net writes: Can someone mention what pins 1-4 are pinned out for on the std. 4 pin TenTec mic.? Mike, Pin 1 is audio and 4 is +4v.d.c. for electret mikes. 73, Larry W5VHP