PARTS OR REPAIR DOES NOT SEEM TO POWER ON. The Vintage General Radio Company Unit Power Supply Type 1203-B AND 1210 PARTS is a unit power supply designed specifically by General Radio Company for their radio communication equipment. This product is compatible with other General Radio Company devices, making it a valuable replacement or spare part for those in need of a unit power supply. The vintage design of this power supply adds a touch of nostalgia to any radio communication setup, while also providing reliable performance for the equipment.