Abstract: An electrode in the form of a conductive balloon is mounted in a head or other body part band. An open face flange with teeth accurately spaced about the flange is secured to the headband. The teeth extend through the head band from one side and fit into spaced slots or holes in a back plate located on the other side of the headband. A portion of the headband is captured by the teeth between the flange and the back plate. A conductive fabric is held between the open face flange and the headband and covers the opening in the flange. When the flange and back plate are drawn or pressed together and held by the teeth secured in the openings in the back plate part of the captured part of the headband is forced out of the opening in the flange. Since the conductive fabric covers the opening in the flange the conductive fabric is pushed upwards by the headband material forced out of the flange opening forming a conductive balloon electrode.