Valve Gallery - Rare And Unusual Valves (2)

Valves: 19F3, 19C3, CV57 (E1271), 5642, VR-92 (10E-105).

Two valves from General Electric above.  Left is 19F3, right is 19C3.  They are large at 210mm tall, can you tell me their function? Shown above is a CV57.  Another big valve at 202mm tall.  This is a beam tetrode with maximum anode voltage of 11000v.  From the early 1940s.  Chrome plated base section.  Equivalent of E1271.

Shown above is a Mullard 5642. Four digit ident numbers from Mullard often indicated special quality.  Wire ended connections, of 52mm height. VR-92, also designated 10E/105.  48mm height.  B3G base. Rectifier, equivalent of EA50.

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