thanks for the reply...i emailed Denecke and they said its the 1/8 mini as you said....tip is "+" and the sleeve is "ground". i assume all mono based plugs are this way.......we'll see. hopefully the dopes at radio shack know what i need. my plan is to build a battery unit similar to the one described elsewhere here that was done for the UA5 unit but it'll have only one battery and a mini plug at the end....looks easy to do.
thanks.
ninja.