Antique radios, Old Time Radios
W21
|
Country:
Great Britain (UK)
|
|
| Identical to |
W21
= KTW21
= CV171
|
| Similar
Tubes |
Normally replaceable-slightly different:
210VPT_4pin
Other base:
W21_7pin
|
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Ero)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.1 Ampere / Direct / Battery = |
| Description |
According to trader sheet 313 a tetrode (expressis verbis and in schematic).
Text in other
languages (may
differ)
|
| Information source |
History of the British Radio Valve to 1940 p. 148 & 196
Babani, International Radio Tube Encyclopaedia p. 164 & 165
-- Original-techn. papers.
Taschenbuch zum Röhren-Codex 1948/49
|
|
W21: Telefunken Werkstattbuch
Wolfgang Bauer
|
Just Qvigstad
|
W21: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos
|
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):19
Collection of
|
|
|
|
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 |
|
|
|
