Antique radios, Old Time Radios
SP18/G
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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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| Identical to |
SP18/G
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| Similar
Tubes |
Normally replaceable-slightly different:
SP18
; SP18/B
Other characteristic (electr. data):
SP18/R
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| First year |
1925
Saga of the Vacuum Tube, Tyne page 373
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| First Source
(s) |
1925 : British Radio Valves - The Vintage Years: 1904-1925 p.47 & 161
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 1.8 Volts / If 0.3 Ampere / Direct / Battery = |
| Description |
Shortpath is a Cosmos brand, see Keith R. Thrower, British Radio Valves, page 48. Probably an anglicised version of the WD11 from the USA.
According to Tyne (pp.373, 374) there are three variants:
- SP18/B
- SP18/G
- SP18/R
in the Benjamin Catalog all SP18 are tubular, although Tyne shows an SP18/G having a globe shape. Error?
The SP18 without dot or suffix (B, G, R) is definitely existing (see photo)
Story of Cosmos valves see here
Text in other
languages (may
differ)
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| Information source |
70 Years of Radiotubes and V. p.196
Saga of the Vacuum Tube, Tyne p.373
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SP18/G: Fin Stewart
Fin Stewart
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
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