Bryan, Heil cartridges are ceramic not electret. 73 de Morel, 4X1AD >Related topic - are the Heil mic's on the headsets electret? > >Tnx es 73! > >Brian n8wrl > -- FAQ on WWW: http://www.qsl.net/k7on/yaesu.html Submissions: yaesu@contesting.com Administrative requests: yaesu-REQUEST@contesting.com Problems: owner-yaesu@contesting.com Search: http://www.contesting.com/km9p/search.htm