Radios antiguas y Radios de Colección
QP22A
|
País:
Gran Bretaña (GB)
|
|
| Idéntica a |
QP22A
= BLL32
= K77A
|
| Fuente principal
(es) |
1935 : -- Original-techn. papers.
|
| Base |
B9 British 9-Pin (Codex=Yx)
|
| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 2 Volt / If 0.45 Ampere / Direct / Battery = |
| Descripción |
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.
|
| Literatura |
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
|
Número de
modelos en Radiomuseum.org con esta
válvula:3
Colección personal de
|
|
|
|
[rmxtube-en]
| Cumplimiento de datos |
Más información |
|
|
|
