Radios antiguas y Radios de Colección
HK255
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País:
Estados Unidos
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| Idéntica a |
HK255
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Válvulas Sucesoras
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HK255H
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| Usada en |
Transmittertube (Radio) |
| Filamento |
Vf 14 Volt / If 30 Ampere / Direct / Specified voltage AC/DC |
| Descripción |
Pa = 500W
This gridless GAMMATRON 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).
Hard-glass bulb, two anode caps from one side, two gamma plate caps from the opposite side and a dummy top cap for stability.
The only Gammatron made in quantity.
Texto en otros idiomas
puede diferir
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Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip |
x 462 x mm / x 18.19 x inch |
| Literatura |
Tube Lore (II) p. 217
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HK255: F.C. Jones
Wolfgang Holtmann
Mas ...
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