The power transformer for the power amplifier of the radio station of the first category, harvested at three lamps GU-50, I performed on the yoke from laboratory autotransformer Latr-2. Present therein, assumes the role of primary winding connected to 220 V.
Having determined that the winding must have a single coil, to obtain a voltage of 1 V, calculated coil voltage 12, 24, 300, and 750 V. Additional winding wound over primary, dividing them between a layer of varnished cloth. Outside all wrapped twill tape.
Made transformer is impregnated with varnish and painted nitroemalyu.
Author: V. Galicki (UA9LA), Tyumen; Publication: N. Bolshakov, rf.atnn.ru