radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

WD11

Information - Help 
ID = 3615
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
Identical to WD11 = SLD11 = 11 = C11
Similar Tubes
Normally replaceable-slightly different:
  M.D.3A ; M11
Other base:
  12 ; DE11 ; WD12 ; WX12
Differences not known by us:
  WR11 ; X11
First year Jan.1922 Saga of the Vacuum Tube, Tyne page 310
First Source (s)
Jan.1922 : Saga of the Vacuum Tube, Tyne
Predecessor Tubes T88_Westinghouse  
Successor Tubes 1923   WD12   WX12   864  

Base WD-base (Codex=Bw)
Was used by Radio/TV-reception etc.
Filament Vf 1.1 Volts / If 0.25 Ampere / Direct / Battery =
Description

Work on this tube started at the Westinghouse laboratories in Bloomfield, New Jersey in mid to late 1921. It was designed for use as a detector in the Westinghouse Aeriola Senior radio. This set was announced in the RCA catalog "Radio Enters The Home" published June 22nd, 1922. This tube had 5 production variants including the original T10 bulb. Later variants had the T8 bulb. The weight varied.

Oxide coated, first without getter then lime-getter. First form with a brass base (BB) with tip. Second has bakelite base and is smaller, tipped. Third version is bakelite, no tipp, clear. Then bakelite, no tip but opaque getter (not clear). The last verion of this tube had silvered gettering. Plate has a bigger diameter at the base. It was made by a few of the major manufacturers in the US, Mullard in England (M.D.3A)and Philips in Holland listed the base as available. It is not known what type number was used for the Philips tube. .

 
Text in other languages (may differ)
Tube prices 68 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   p. 310, 312-313
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature
-- Collector info (Sammler)

exampleforusingwd11.png
WD11: RCA
Anonymous 56 Collector
    More ...
wd11sockelbild_2~~1.png WD11: KoBi
Konrad Birkner † 12.08.2014


Just Qvigstad
wd11_1.png
WD11: KoBi
Konrad Birkner † 12.08.2014

More ...
Usage in Models 4= 1922? ; 14= 1922 ; 1= 1923? ; 22= 1923 ; 11= 1924

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):52

Collection of

 
wd-11rca_3_klein.jpg

WD11
 

Variants

First type: Aeriotron; Brass Base; tipped; clear glass envelope;1.25 inch dia.; overall height ca 4.5 inch; no getter; January 1922; Tyne p.310

Fourth type: Radiotron; Bakelite Base, no tip; clear glass envelope; 1 inch dia.; overall height ca 3.5 inch; lime getter;

Fifth type: type: Radiotron; Bakelite Base, no tip; opaque glass envelope; 1 inch dia.; overall height ca 3.5 inch; magnesium (?) getter;

Third type: Radiotron; Bakelite Base, tipped; clear glass envelope; 1 inch dia.; overall height ca 3.6 inch; lime getter;

Second type: Radiotron; Brass Base; tipped; clear glass envelope;1.25 inch dia.; overall height ca 4.5 inch; lime getter; late in 1922; Tyne p.310


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

Data Compliance More Information