Inductance Tuning Crystal Radio Circuit

Published:2011/6/28 6:08:00 Author:Michel | Keyword: Inductance Tuning Crystal Radio Circuit | From:SeekIC

First of all,the Q value of the spherical adjustable inductance coil is measured by Q table. the capacitor The capacitor of Q table is fixed on 55pf and the measuring result is:Maximum induction:550 KHz Q = 68,Middle induction:745 KHz Q = 60,Minimum induction:2770 KHz Q = 30.The capacitor of Q table is fixed on 80 pf and the measuring result is:Maximum induction:478 KHz Q = 77,Middle induction:995 KHz Q = 47,Minimum induction:2300 KHz Q = 15. The coil's Q value is not high,especially the inside and outside coil reverse and the Q value is lower when the inductance cancel each other out.But it can used as crystal radio receiver tuning without variable capacitor and the line is simpler.



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