An EMC Model 200 Tube Tester Restoration

This mutual conductance tube checker was built by the Electronics Measurement Corporation of New York. It's a post war tester and can measure tube Gm in micromhos or give a quality measurement on an English Reading scale. And like most "modern" testers it can also check for shorts, gas and noise. There are sockets for early 4 to 7-pin large tubes, plus octal, loctal, Bantam Junior, and 7-pin and 9-pin minatures.

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The exterior is in good shape, with just the usual dirt, rusty screwheads and such to deal with. I won't be able to check out the inside until I get it on the bench.

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This model 200 does not have a top cover or handle for a repairman to carry it on service calls. Instead, it is mounted in a slope-front countertop display cabinet for in store use. Perhaps it sat on a counter to test tubes brought in by customers.

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More to come...

Page created 11/12/2021
Last edit 11/12/2021