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27, UY-227, TRIODE
The type 27 triode also known as the UY-227 is a UX5 based, 2.5V heater, indirectly heated audio valve that first came to market in 1935.
The type 27 triode also known as the UY-227 is a UX5 based, 2.5V heater, indirectly heated audio valve that first came to market in 1935.
