| Identical to |
215A
= 4215A
= WE215A
= 38015
= Wecovalve
= CW1344
= VT-5
= CW-1344
= CW-38015
= R215A
= 215A_Nissl
|
| Similar
Tubes |
4215AB (other base)
Wecovalve_4pin (other base)
239A (can normally be replaced - small diff'ce)
|
| First Series |
1923 Radios von gestern |
| First Source
(s) |
1919 : Saga of the Vacuumtube, Tyne page 371
|
|
| Base |
OTHER TUBEBASE in general
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Direct /
-: Battery = /
If: 0.25 Ampere /
Vf 1.4 Volts /
|
| 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.
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.
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)
|
| Tube prices |
1 Tube prices (visible for members
only)
|
| Literature |
-- Original-techn. papers.
Taschenbuch zum Röhren-Codex 1948/49
Saga of the Vacuumtube, Tyne
|
|
