Introduction The Mercury Model 1000 introduces a new concept in Dynamic Mutual Conductance tube testing. A combination of lever-switch versatility and multiple socket speed brings a true Mutual Conductance (Gm) tube tester into the popular price range for the first time. The Model 1000 tests for shorts between any tube elements. The 2Color GAS scale on the meter shows grid leakage and gas content with a sensitivity of over 150 megohms. Tubes such as rectifiers, power amplifiers, etc.
