Antique radios, Old Time Radios
PLAV9S
| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 1.25 Volts / If 0.08 Ampere / Direct / Battery = |
| Description |
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.
Text in other
languages (may
differ)
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| Information source |
-- Original prospect or advert
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Just Qvigstad
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PLAV9S: Riepka, Die Röhre, 1926
Anonymous 15 Collector
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Collection of
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