6P3S Foton Reflector x2 (6L6 6L6GT 6П3С) Output beam tetrode tubes Tested

Foreign analogues of the 6P3S lamp: 6L6G, 6L6GB, EL39, 6CN5, 1622, 5881, 5932, 7581A. Output beam tetrode in a glass shell with an octal base. Deciphering the marking of the output beam tetrode Reverse current grid first 3.0 uA.

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