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#4
28-06-18, 08:53
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One of the tube testers I have is the TV-7 C/U made in the early 1950s. Still has the Canadian military ID plate. Mounted on the inside lid is an adaptor box for British and other weird tubes (valves). It is possible that British testers like AVO were sent to Canada. They typically operated from 105V to 250V, 50 - 500 Hz.
We still had AVO products in our calibration lab at BC Tel in the 1990s. 
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