Antique radios, Old Time Radios
857B
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Country:
United States of America (USA)
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| Identical to |
857B
= 38157B
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| Similar
Tubes |
Normally replaceable-slightly different:
GL-510
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| Predecessor Tubes |
857A
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| Base |
Wires
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 5 Volts / If 30 Ampere / Direct |
| Description |
Improved version of 857A. GT56 spherical-tubular bulb, flying leads at bottom. Oxide coated filament, with heater current reduced to 30A. 22KV PIV, 10A average with forced air cooling; 14V typical voltage drop.
GE, Hytron, RCA, Westinghouse, but also Marconi Italy, among known manufacturers.
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Dimensions (WHD)
incl. pins / tip |
x 495 x 183 mm / x 19.49 x 7.20 inch |
| Weight |
1650 g / 58.20 oz |
| Information source |
Tube Lore (II) p. 79 & 213
- - Manufacturers Literature
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49
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857B
Anonymous 10 Collector
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857B: Manufacturer's Literature
Emilio Ciardiello
More ...
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