This is an odd rectifier, probably designed for EHT use, The shielded filament is helical and mounted horizontally. Sadly it is open circuit.
The shielded filament.
The flat anode.
The medium Edison screw base.The balloon envelope is 30 mm in diameter and, excluding the MES base, is 137 mm tall.Reference: Observation. |
Updated May 22, 2023.
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