Radio Antica e Radio d'epoca
PLAV9D
| Zoccolo |
Telefunken base 4 pin
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Vf 1.25 Volt / If 0.08 Ampere / Direct / Battery = |
| Descrizione |
This gridless triode was developed so as not to infringe with the Lee de Forest patent (owner RCA) on the control grid. Instead, the plate close to the filament has influence on the electron flow towards the other plate (anode).
For marking purposes, the upper part of the glass bulb of the PLAV9 tubes was painted blue, at least for a while.
Testo in altre lingue
(può variare)
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| Bibliografia |
-- Original prospect or advert
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Just Qvigstad
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PLAV9D: Riepka, Die Röhre, 1926
Anonimo 15 Collezionista
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Ulteriori informazioni |
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