Antique radios, Old Time Radios
U3
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Country:
Great Britain (UK)
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Brand:
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| Tube type: |
Half-Wave Vacuum Rectifier Power-supply |
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<1925 very rare. *** |
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| Identical to |
U3
= AU3_E27
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| Similar
Tubes |
Normally replaceable-slightly different:
AU15
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| Base |
Edison big E27 = 27 mm
Base on each end.
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| Filament |
Vf 5.5 Volts / If 1.5 Ampere / Direct / Battery = |
| Description |
Ua = 100 V, Ia = 37 mA; Uamax = 3000 Volt.
Upper base : single contact Bayonet 22mm. Lower base : Edison E27
Known Manufacturers are Osram and Cossor. Main picture shows the Cossor version. GEC Osram in additional photo.
Stokes shows a picture of an Osram U3 with a giant 4 pin base. However known Osram literature shows it with the Edison Screw base and is equivalent to the Cossor U3.
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
56 x 130 x mm / 2.20 x 5.12 x inch |
| Weight |
50 g / 1.76 oz |
| Tube prices |
2 Tube prices (visible for members
only)
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| Information source |
70 Years of Radiotubes and V.
- - Manufacturers Literature 1924
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Just Qvigstad
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U3: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector
More ...
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Collection of
Collection of a member from D |
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