Antique radios, Old Time Radios
5557
| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
Top contact with a cap.
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| Was used by |
Industrial |
| Filament |
Vf 2.5 Volts / If 5 Ampere / Direct |
| Description |
This tube is a thyratron version of the 866A. Also made in Italy by Fivre.
The tube is a negative control mercury vapor thyratron for use where it is desired to acuate the tube with a change in negative grid voltage. It requires relatively little grid power and is suitable for use in relay circuits where current flow is desired in the absence of grid exitation.
Text in other
languages (may
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| Tube prices |
1 Tube prices (visible for members
only)
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| Information source |
Tube Lore (II) p. 90
Babani, International Radio Tube Encyclopaedia p. 302
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
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5557: Manufacturer's Literature
Emilio Ciardiello
More ...
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Just Qvigstad
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5557: Manufacturer's Literature
Emilio Ciardiello
More ...
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