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ID = 72060
United States of America (USA)
Brand: O. & T. (O-T) Electric Corporation (Silvertone); New York, NY
Tube type:  Triode, vacuum   Audio Frequency 
Identical to OT1A

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 0.15 Ampere / Direct / Battery =

The O-T series of tubes were manufactured by the O-T Corp and not by the de Forest Telegraph and Telephone company. de Forest sued O -T for misuse of his company name and won the case. This is despite most tubes showing that the tubes were made for O - T. The advertisement in Radio News, March 1924 also carries the same erroneous informnation.

Dimensions (WHD)
incl. pins / tip
x 112 x 45 mm / x 4.41 x 1.77 inch
Weight 50 g / 1.76 oz
Tube prices 1 Tube prices (visible for members only)
Information source -- Original prospect or advert   
OT1A: ebay, seller: barbaraf508, 322045049981
Anonymous 15 Collector

OT1A: Fin Stewart
Fin Stewart


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