with Transformer Incorporates the following features. It is based on 'GRIFFEN' Pattern which is highly suitable for reflecting 'BESTO' Ballistic Galvanometers. It consists of a heavy steel cabinet made from S. W.G. 20 sheet of size 6" x4" x3½" with front printed panel. In this steel cabinet, a step down transformer of 6 volts, 3.5 Amps is enclosed, which is suitable for the lamp house.