Antique radios, Old Time Radios
UV199_prototype
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Country:
United States of America (USA)
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| Identical to |
UV199_prototype
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Successor Tubes
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1922
UV199
UX199
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| Base |
No base
Wires only.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 3 Volts / If 0.135 Ampere / Direct / Battery = |
| Description |
Early in 1921 developmental work was done in the GE Research laboratories at Harrison, New Jersey on a tube which would be small in size and having a low filament current. The tube was double ended, with no bases. Connecting wires were of stubby copper extending about 5 mm from the glass. The filament connections were at each end and anode and grid from the opposite ends, each about 5 mm from the filament wire.. The tube was manufactured in a very limited quantity but was designed for use in a portable radio designed by GE. In December 1921 the filament wire was reduced in width to .6 mm (from .9 mm), which produced a current of .06 amps.In May 1922 the tube was redesigned to have the 4 pin UV199 base.
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| Information source |
-- Collector info (Sammler)
-- Original-techn. papers.
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