This Inductance Bridge Circuit Diagram will measure inductances from about 1 to 30 at a test frequency of 5 mHz. A 365-pF AM-type tuning capacitor is used as a variable element. The circuit should be constructed in a metal enclosure. Calibration can be done on known inductors or by plotting a curve of the capacitance of the 365-pF capacitor versus rotation and calculating the inductance from this.
The range of measurement can be charged by using a different frequency crystal and/or variation of L2 and C6.
Inductance Bridge Circuit Diagram
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