300BS-B triode equivalent, triode.
Gold-plated socket pins White ceramic tube socket Carbonized nickel plate reduces reflection of electrons, reserving the original audio signal Filament hooking by using s.
300BS-B is compatible with 300B, direct heating cathode and medium power consumption. Two triodes can be used in the class A amplification. It is adapted to be used in audio frequency range which requires high output power of 100W. 300B-C long-life d.
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