This exhibit is a De Forest DV-2 fitted with a nickel Shaw standard base. The V in the type designation refers to the UV base cap and the 2 should represent the approximate filament voltage, however, on later versions the label shows 5 Volts for the filament.The paper sticker is of the original form. Exhibit DV-2 has the Isolantite base and the later long paper sticker with the 5 Volt filament rating.![](../pics/aco0062a.jpg)
The original packing can.Thanks to Joe Gruber for sending the images.The wide glass tube envelope is 32 mm in diameter and, including the base pins, is 105 mm tall.Reference: Joe Gruber. Type DV-2 was first introduced in 1923. See also 1923 adverts. |
Updated October 04, 2020.
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