Over designed for single ended tube output circuits (triode, tetrode or pentode tubes). Enclosed (shielded), 4 slot, above chassis Type 'X' mounting. Frequency response at least 20 Hz. to 20 Khz. at full rated power (± 1 db max. ref. 1 Khz). Insulated flexible leads 8" min. Includes a 40% screen tap for Ultra-Linear operation (if desired). High quality laminations, (M6) grain oriented silicon steel. Core is gapped to reduce core saturation in Class-A circuits. For general purpose or replacement use in single ended tube output circuits see our P-T125SE series. Specifications