Antique radios, Old Time Radios
A_Magnavox
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Country:
United States of America (USA)
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| Identical to |
A_Magnavox
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| First year |
1924
70 Years of Radiotubes and V.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
If 0.25 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, a bar (or bars) fitted behind the filament has influence on the electron flow towards the plate(s).
In later production, the control electrode was a piece of sheet metal with serrating edges to enclose partially the filament.
Text in other
languages (may
differ)
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| Tube prices |
1 Tube prices (visible for members
only)
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| Information source |
70 Years of Radiotubes and V.
Ballast-Tube Handbook; Jacobi 1985 Suppl.3;Chart #7, for suitable Ballast Amperite 1A
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A_Magnavox: Fin Stewart
Fin Stewart
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Collection of
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