Summary
Two electronic valves (twin triodes), Type ECC83 12AX7 manufactured for Trigon, London, England in original packaging. Used as spare parts for the MUDPAC analogue computer. These valves were used in the second stage of the operational amplifier modules and in the integrator modules, they may also have been used in the power supply.
Physical Description
Tubular glass bulb with exhaust tip on top with standard nine pin miniature base. Cardboard box with orange, brown and light green glossy background; black printed text.
More Information
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Collection Names
Melbourne University Dual Package Analogue Computer (MUDPAC) Collection
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Collecting Areas
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Acquisition Information
Donation from Electrical & Electronic Engineering Department, University of Melbourne (The), 02 Dec 1987
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Manufacturer
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Inscriptions
On bulb: ' TRIGON / ECC83 12AX7 ' On box: ' TRIGON / LONDON ENGLAND ', ' ELECTRONIC TUBE ', ' TRIGON / ECC83 / 12AX7 / LONDON ', ' GUARANTEE / This tube is guaranteed against faulty / material and workmanship for SIX / months from receipt. / The guarantee does not cover misuse / or consequential damage. '
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
20 mm (Width), 20 mm (Depth), 88 mm (Height)
Above dimensions are for the box.
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Part Dimensions
55 mm (Height), 20 mm (Outside Diameter)
Dimensions for each valve only.
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Keywords
Electronics, Analogue Computers, Computers, Computer Technology, Electronic Engineering, Thermionic Electron Valves, Computer Engineering, Computer Hardware, MUDPAC (Computer)
