Five silicon junction diodes
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Five silicon junction diodes: Ferranti ZS20B (c.1960); STC BAY31 in DO7 case (c.1960); Fairchild 1N4148 in DO35 case (c.1970); Hewlett Packard 2835 schottky barrier (c.1970); one other unknown in blue/green glass (c.1960)
