Antique radios, Old Time Radios
100TS
| Base |
SPECIAL TUBEBASE in general (Codex=sp)
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| Was used by |
Radar |
| Filament |
Vf 5 Volts / If 10.5 Ampere / Direct |
| Description |
Eimac pre-war code for the well known VT-127. It was derived from the 100T, modified to operate as pulsed oscillator at 208 MHz. Two plate pins and two grid pins came out well insulated from the side of a three-inch uranium-glass bulb. A bigger filament was used to increase the emission.
The development started in 1937, with the parallel development of SCR-268 radar. For a while platinum wire was used for the grid, to reduce secondary emission. Sixteen tubes were used in the ring oscillator of the SCR-268 transmitter. Pulses of 75 kW at 208 MHz were generated, with about 120 kW in input.
The Eimac code was changed to 3-100D2 from 1940, with the new number plan.
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
-- Original-techn. papers. Electronics, September 1945
Tube Lore (II)
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100TS: Tabu Röhren-Codex, 1948
Anonymous 15 Collector
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