Seven silicon power transistors
Seven silicon power transistors: STC TK202A (c.1962); Texas TIP32 (c.1970); Mullard BD132 (c.1970); Four Texas BD245 (c.1980) mounted on a heat sink
Seven silicon power transistors: STC TK202A (c.1962); Texas TIP32 (c.1970); Mullard BD132 (c.1970); Four Texas BD245 (c.1980) mounted on a heat sink