Antique radios, Old Time Radios
R7
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Country:
Great Britain (UK)
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Brand:
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| Tube type: |
Triode, vacuum Universal |
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<1925 very rare. *** |
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| Identical to |
R7
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| First year |
1920
Saga of the Vacuum Tube, Tyne page 221
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| Base |
IS-1 (Interservice, UK 1918)
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| Was used by |
Military and/or Government |
| Filament |
Vf 3.7 Volts / If 0.48 Ampere / Direct / Battery = |
| Description |
British Navy version NR7
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Dimensions (WHD)
incl. pins / tip |
x 81 x 35 mm / x 3.19 x 1.38 inch |
| Information source |
British Radio Valves - The Vintage Years: 1904-1925 Page 40
Saga of the Vacuum Tube, Tyne Page 221
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R7: Fin Stewart
Fin Stewart
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