Catalogue de radios anciennes
QP22A
|
Pays:
Royaume Uni
|
|
| Identique à |
QP22A
= BLL32
= K77A
|
| Première source |
1935 : -- Original-techn. papers.
|
| Culot |
B9 British 9-Pin (Codex=Yx)
|
| Utilisé par |
Radio/TV-reception etc. |
| Chauffage |
Vf 2 Volt / If 0.45 Ampère / Direct / Battery = |
| Description |
Announced in the 1935 Data book of Mullard.
Each section of the valves are graded with the letters P,Q,R,S, or T. etched on the glass above pins 2 and 7 which identify the two halves. This enables screen voltages in the range 103.5 to 133.5 to be selected to achieve a balance between the two sections without the need to measure the anode currents.
|
| Bibliographie |
History of the British Radio Valve to 1940 p. 142 & 188
- - Manufacturers Literature Mullard 1935
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
|
|
QP22A: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
|
Just Qvigstad
|
QP22A: Mullard Valves 1936
Peter Hoddow
|
Modèles de Radiomuseum.org avec ce composant :3
Collection de
|
|
|
|
[rmxtube-fr, noindex]
| Mentions légales |
Plus d'informations |
|
|
|
