Sensibly equivalent¶ to:
The VR54 contains a pair of screened signal diodes with separate cathodes. The glass envelope has been further screened with an external copper metallisation that has then be painted.
The interesting thing about this exhibit is that the envelope is shaped and most VR54's had a tubular envelope.
The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins, is 63 mm tall.
References: Data-sheet, 1040 & 1043. Type VR54 was first introduced in 1941. See also 1941 adverts.
Absolute Maximum Operating Conditions¶
Updated January 07, 2022.