Electronic valve (twin triode), Type 12BH7, manufactured in Japan for Amalgamated Wireless Valve Co. Pty. Ltd, in original packaging. Used as spare part for the MUDPAC analogue computer. This valve was used in the third (output) stage of the operational amplifier modules.

Physical Description

Tubular glass bulb with exhaust tip on top with standard nine pin miniature base. Cardboard box with blue and red glossy background; red, white and blue printed text.

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