Antique radios, Old Time Radios
Audion_11-S-grade
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Country:
United States of America (USA)
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| Identical to |
Audion_11-S-grade
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| Similar
Tubes |
Normally replaceable-slightly different:
Audion_12-x-grade
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| Base |
Edison (candelabra) 12 mm
Other combinations of connections.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Direct / Battery = |
| Description |
In the manufacture of commercially available Audions in 1909 an anomaly occurred whereby some tubes performed at a much higher level than others on test. The standard tubes were referred to as S grade and sold at a price that was affordable for some customers. The higher performing tube was called X grade and sild for a higher price. It is not known how long this practice continued. The two tubes could did not have any way of being identified from each other.
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Dimensions (WHD)
incl. pins / tip |
x 54 x mm / x 2.13 x inch |
| Information source |
Saga of the Vacuum Tube, Tyne Page 69
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line up.
[rmxtube-en]
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