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T_deForest

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ID = 28807
       
Country:
United States of America (USA)
Brand: DeForest-Tubes
Developer: DeForest-Tubes 
Tube type:  Triode, vacuum   Detector 
Identical to T_deForest
Similar Tubes
Normally replaceable-slightly different:
  Ultraudion
First year 1912 Saga of the Vacuum Tube, Tyne page 120 ad and 119, 121, 162
First Source (s)
1916 : Saga of the Vacuum Tube, Tyne p. 119-121
Base Wires Wires only.
Was used by Radio/TV-reception etc.
Filament Direct / Battery =
Description

tubular audion from 1912, made by McCandless. initially sold only together with Audion (e.g.RJ-4). From April 1916 on also offered separately for sale.

 
Information source -- Original prospect or advert   in Tyne Fig.7-11, p.120
tf1.png T_deForest: Fin Stewart
Fin Stewart
tdeforestdata1.png
T_deForest: own collection
Peter den Boer
More ...
Usage in Models 1= 1914 ; 1= 1916?? ; 2= 1916 ; 3= 1917 ; 3= 1919 ; 2= 1920 ; 1= 1921
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):13

Collection of

Werner Wiemer (D)
Robert Gillespie (USA)
Collection of a member from D
 
screenshot_20210622_072214_gallery.jpg

T_deForest
 
Forum contributions about this tube
T_deForest
Threads: 1 | Posts: 1
Hits: 1644     Replies: 0
Directions for using the Type "T" Tubular Audion Bulb
Alan Larsen
14.Dec.16 		  1
Directions for using the Type "T" Tubular Audion Bulb 

From the 1916 Manhattan Electrical Supply catalog. 
 
T_deForest
End of forum contributions about this tube
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