Summary
Valve # 1: Radiotron, Heptode Type 6A7, circa 1935
Valve # 2: Mullard, Heptode Type 6A7, circa 1935
Physical Description
Shouldered glass bulb with top cap and American small 7 pin base, sectioned to reveal the internal structure (Valve # 1). Mounted on display block with an intact example of the same type of valve (Valve # 2).
More Information
-
Collection Names
-
Collecting Areas
-
Acquisition Information
Purchase
-
Manufacturer
Australian Wireless Valve Co (AWV Co), Sydney, New South Wales, Australia, circa 1935
Valve # 1 -
Manufactured For
Mullard (Australia) Pty Ltd, Sydney, New South Wales, Australia, circa 1935
Valve # 2 -
Manufacturer
Australian Wireless Valve Co (AWV Co), Sydney, New South Wales, Australia, circa 1935
Valve # 2 -
Inscriptions
Valve # 1: Bulb: 6A7 Pinch: U12 Base (Hot stamped): Radiotron/MADE IN AUSTRALIA Valve # 2: Bulb: 6A7 (indistinct)/26 Base (Hot stamped): MADE IN AUSTRALIA Mullard Display block: Brief Description The appearance of the hot stamped brand on the base indicates that the maker was AWV who used this style of labelling in the early 1930s.
-
Brand Names
-
Classification
-
Category
-
Discipline
-
Type of item
-
Overall Dimensions
115 mm (Length), 38 mm (Outside Diameter)
Valve # 1 - not including dispaly block.
-
Overall Dimensions
114 mm (Length), 38 mm (Outside Diameter)
Valve # 2 - not including display block.
-
Keywords