Antique radios, Old Time Radios
R-1790
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Country:
United States of America (USA)
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| Identical to |
R-1790
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Successor Tubes
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1939
1630
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| Base |
SPECIAL TUBEBASE in general
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| Was used by |
Radar |
| Filament |
Indirect |
| Description |
Orbital-beam hexode electron-multiplier VHF amplifier (secondary emission). This appears to be a very early prototype of the 1630 VHF amplifier. Giant acorn body, with 12 equally spaced radial pins.
The code is written by hand, with the date, Aug. 15,'39, and with a series of numbers, 15/4.7 - 16.
This sample comes with its lab built socket and bottom copper shield.
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Dimensions (WHD)
incl. pins / tip |
55 x x mm / 2.17 x x inch |
| Tube prices |
1 Tube prices (visible for members
only)
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| Information source |
-- Collector info (Sammler)
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Collection of
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