Simple voltage regulator tube tester circuit
Source: InternetPublisher:桂花蒸 Updated: 2011/11/04
The simple voltage regulator tube tester can directly measure the voltage stabilization value of the voltage regulator tube and is very convenient to make. The electrical principle is shown in the figure below. The IC can be F007, CA3140, μA741 and other amplifiers. R3 should be a 22K straight-slide potentiometer. R3 is required to accurately calibrate the voltage value according to the positive power supply voltage and mark it on the casing.
In addition, due to the limitation of IC operating voltage, the test is limited to voltage regulator tubes with a voltage regulator value below 30V.
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