Andrew Wylie, wylie.org.uk: Vintage Mullard Semiconductors Citat "...At the time, the behaviour of manufactured transistors varied considerably, so devices from one production line were sorted into either OC70, OC71, or OC75 using a Transistor Test Board to measure their performance...", backup
Andrew Wylie, wylie.org.uk: Vintage Mullard Semiconductors Citat "...At the time, the behaviour of manufactured transistors varied considerably, so devices from one production line were sorted into either OC70, OC71, or OC75 using a Transistor Test Board to measure their performance...", backup
