Antique radios, Old Time Radios
WD11
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Country:
United States of America (USA)
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|
| 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)
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| 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)
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WD11: RCA
Anonymous 56 Collector
More ...
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WD11: KoBi
Konrad Birkner † 12.08.2014
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Just Qvigstad
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WD11: KoBi
Konrad Birkner † 12.08.2014
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):53
Collection of
Collection of a member from USA Collection of a member from D |
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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
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Fourth type: Radiotron; Bakelite Base, no tip; clear glass envelope; 1 inch dia.; overall height ca 3.5 inch; lime getter;
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Fifth type: type: Radiotron; Bakelite Base, no tip; opaque glass envelope; 1 inch dia.; overall height ca 3.5 inch; magnesium (?) getter;
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Third type: Radiotron; Bakelite Base, tipped; clear glass envelope; 1 inch dia.; overall height ca 3.6 inch; lime getter;
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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
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