Antique radios, Old Time Radios
500_deforest
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Country:
United States of America (USA)
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| Identical to |
500_deforest
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| Base |
Wires
Wires only.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Direct |
| Description |
Special 500 watt double ended oscillator. Anode from top, grid and filaments from entry points near the bottom of the glass bulb. This tube employs a standard "pinch" to hold the element structure but is not used for the grid and filament wires.
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| Information source |
Radio Engineering August 1930, page 17
-- Collector info (Sammler)
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Collection of
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