3B/600Z STC DO60 DA60 Standard Telephones and Cables Ltd. 60 Watts directly heated triode L4 base

STC type 3B/600Z directly heated triode L4 base GBP 400.

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Description

Extremely rare valve made by STC type 3B/600Z .

It is basically a 60 watts valve close to same specification of DO60 which we have already reviewed on DO60 page.

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