EC92 Telefunken 6AB4EC92 Telefunken 6AB4EC92 Telefunken 6AB4
One half of ECC81 / 12AT7, single triode, the best solution for Neumann Gefell microphones!!! Diamond mark, great audio triode! A lot of tubes with same codes, very close selection and matching is possible for stereo recording, used, but like new!!!

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