The Cossor 43-IU (43IU), is an indirectly heated full wave device rectifier. Our other examples of this rectifier Type have balloon envelopes and different anode shapes. See 43IU. The two perforated anodes have a wide face and small front to back dimension.One anode face view. The indirectly heated cathode sits in a cylindrical cavity at the centre of the anode.The top mica, the hairpin heater can be seen and the two cathodes are both connected to the central support.A closer view of the construction.The classic envelope is 45 mm in diameter, and excluding the B4 base pins is 104 mm tall.References: 1040 & 1043. Type 43IU was first introduced in 1937. See also 1937 adverts. |