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215A

Information - Help 
ID = 2653
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Universal 
  <1925 rare.
Identical to 215A = 4215A = WE215A = 38015 = Wecovalve = CW1344 = VT-5 = CW-1344 = CW-38015 = R215A = 215A_Nissl = D-98677 = D-80050 = Wecovalve_A
Similar Tubes
Normally replaceable-slightly different:
  239A ; H125A
Other base:
  4215AB ; 4215_AB ; Wecovalve_4pin
Other base and data slightly different:
  4001_AB
First year 1919 Saga of the Vacuumtube, Tyne page 371
First Source (s)
1920 : Radios von gestern, 3. Auflage page 212

Base SPECIAL TUBEBASE in general
Was used by Radio/TV-reception etc.
Filament Vf 1.4 Volts / If 0.25 Ampere / Direct / Battery =
Description

Hendrik Johannes van der Bijl (WECO, USA) developed this first WECO tube. It is also called peanut-tube for it's very small size. As Type N it has been finished in 1919 and was on market as 215A in the early 20ies - for nearly a decade.

The earliest type of 215A tube had a bakelite 4 contact base which was 16 mm diameter and had a metal locking pin on the side, with the bulb diameter being 13 mm diameter. in 1922 the bulb size was increased to 16 mm diameter. Various methods of supporting the element structure were adopted over the tubes' economic life. In later tubes, the locking pin was also bakelite and some tubes had magnesium flashing.


H.J. van der Bijl deducted the fundamental functional relationships of triodes and by that won a post at the Western Electric Company (WECO) as Senior Research Phyicist until the publication of the book "Theory of the Thermionic Tube and its Applications" in 1920. (EE)

The peanut-tube was also produced in Canada by Northern Electric.
In UK ST&C (Standard Telephone & Cables, London) has produced the 215A as 4215A (with adapter to B4 socket) and as 4215AB (with B4 base) to fit European standard socket. Tyne, p.370.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 60 x 16 mm / x 2.36 x 0.63 inch
Weight 10 g / 0.35 oz
Tube prices 16 Tube prices (visible for members only)
Literature -- Original-techn. papers.   
Taschenbuch zum Röhren-Codex 1948/49   
Saga of the Vacuumtube, Tyne
 
215a_bild1.jpg
215A
Rudolf Osterkamp

 
215a_sockel.png
215A: nach Western Electric 1933
Robert Schmalstieg

 
wecodata.png
215A: KoBi
Konrad Birkner † 12.08.2014


Usage in Models 1= 1922?? ; 1= 1922? ; 2= 1922 ; 2= 1923? ; 9= 1923 ; 2= 1924? ; 2= 1924 ; 1= 1925?? ; 5= 1925? ; 5= 1925 ; 2= 1926? ; 1= 1927 ; 1= 1928

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):34


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