Antique radios, Old Time Radios
C-100E
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Country:
United States of America (USA)
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| Identical to |
C-100E
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| Similar
Tubes |
Heater different:
C-100D
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| Predecessor Tubes |
C-100A
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| Base |
6-Pin-Base U6A, old, USA
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 6.3 Volts / If 0.92 Ampere / Direct / Specified voltage AND current AC/DC |
| Description |
Negative resistance oscillator tube specifically developed for Collins by Amperex, to avoid to be sued for patent infringement by RCA, AT&T, Westinghouse and the other owners of the rights for the De Forest triode oscillator circuit. The tube was intended for use in crystal controlled transmitters.
It derived from C-100A, with a different internal structure for better sensitivity. The negative electrode, equivalent to the grid, surrounds a finned positive electrode.
Very few tubes were made before the settlement with RCA and the subsequent use of a 6L6 as conventional oscillator.
6.3 V version of C-100D
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| Information source |
-- Original-techn. papers.
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C-100E: Manufacturer's Literature
Emilio Ciardiello
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Just Qvigstad
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