BROADCAST_BAND_BOOSTER

Published:2009/7/9 1:19:00 Author:May | From:SeekIC

The use of a loop antenna oflarge size (12×18″)provides a large signal pickup at AM broadcast frequencles.It has about 18 turns. T1 is a toroidal transformer of about⒊1 turns ratio (not critical).Theprimary winding should have about 1.5 mH inductance. By using the circuit at (B),a varactor diode can beused In place of the 10－ to 365－pF variable capacitor.



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