Stone Vintage Radio Museum - Antique Radios, Wireless, Crystal Sets, Tubes, and Valves

Three Tubular Audiotron Tubes. Each has one good filament. Both have long leads which is not very common. A (the one left) is a Cunningham with both the instruction sheet that came with the tube but also the mounting brackets for attaching to the front panel of a radio. B (the middle one in the picture) is another Cunningham Tubular Audiotron Tubes from 1915. Not all Cunningham tubes had a label but this one has one. C is an ER tubular tube made by Moorhead.

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