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The 164V amplifier triode from Mullard dates from the early 1930s.
The flattened cathode is indirectly heated. The anode box lies horizontally within the envelope. The stamped pattern gives rigidity to the thin bright metal used for the anode. The grid extends beyond the anode box and is shaped so that it is --[ ]-- in section. This allows the outer part of the grid wires to radiate heat and so prevent secondary emission.
The balloon envelope is 50 mm in diameter and, excluding the B5 base pins, is 91 mm tall.
Pin Connections
The flattened cathode is indirectly heated. The anode box lies horizontally within the envelope. The stamped pattern gives rigidity to the thin bright metal used for the anode. The grid extends beyond the anode box and is shaped so that it is --[ ]-- in section. This allows the outer part of the grid wires to radiate heat and so prevent secondary emission.
The balloon envelope is 50 mm in diameter and, excluding the B5 base pins, is 91 mm tall.
Pin Connections
The balloon envelope is 50 mm in diameter and, excluding the B5 base pins, is 91 mm tall.
Pin Connections
Pin Connections
