Radio Antica e Radio d'epoca
QP22A
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Stato:
Gran Bretagna (Regno Unito)
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|
| Identico a |
QP22A
= BLL32
= K77A
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| Prime
informazioni |
1935 : -- Original-techn. papers.
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| Zoccolo |
B9 British 9-Pin (Codex=Yx)
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Vf 2 Volt / If 0.45 Ampere / Direct / Battery = |
| Descrizione |
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.
|
| Bibliografia |
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
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| Tube Tester Data |
Avo CT160 |
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QP22A: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20
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Just Qvigstad
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QP22A: Mullard Valves 1936
Peter Hoddow
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Numero
totale di modelli di Radiomuseum.org che
utilizzano questa valvola:3
Collezione di
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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