Antique radios, Old Time Radios
T88_Westinghouse
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Country:
United States of America (USA)
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| Identical to |
T88_Westinghouse
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Successor Tubes
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1922
WD11
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| Base |
WD-base
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| Filament |
Vf 1.1 Volts / If 0.25 Ampere / Direct / Battery = |
| Description |
In 1920, Westinghouse had decided to make a dry cell tube that ran on a single 1.5 volt battery. Due to battery drain, they decided that 1.1 volts should be the rated filament voltage.
The research department created a list of tubes, numbered T1 to T99, each with different construction. By mid 1921, testing had shown that T88 was the most promising - 35 initial samples were made for test purposes.
Unsure that the Westinghouse factory could produce the tube, 500 initial tubes were ordered to be made - it is estimated that 300 were actually made. Following the successful test run, the WD-11 went into full commercial production.
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