Standard Telephones and Cables
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Författare/Upphovsman: Jacques from Cape Town, South Africa, Licens: CC BY 2.0
Standard Telephones and Cables Ltd 4212d. The 4212D is a power triode with an anode dissipation of 200 Watts, clone of American type 212. Typical plate voltage/current 1.5 kV/130 mA, producing 45 W class-A output power.