Accurate FM tuning indicator circuit

Published:2011/5/20 2:44:00 Author:Christina | Keyword: Accurate, FM, tuning, indicating circuit | From:SeekIC

This indicator can prompt the tuning state by adjusting the discriminator's DC output to zero. The key point of the circuit debugging is the T1's operating point, you can use the millvolt meter to oversee the DC output, to adjust the receiver to the FM radio station, then change R2 to make D3 in the brightest state.



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