4 Band Double Tuned Preselector

Published:2012/11/21 21:14:00 Author:muriel | Keyword: 4 Band , Double, Tuned Preselector | From:SeekIC

The circuit requires an RF input which can be from a longwire or a loop antenna. The Preamplifier has a range from 550kHz (Medium Wave) up to 30 MHz in the SW band. The input Switch S1, applies voltage to a set of relays which switch in the appropriate coils.The preamplifier is double tuned on the input having two IFT coils for each RF range, input applied to G1 of a double gate MOSFET. Gain control is applied to G2 and the output is taken from the DGMOSFET drain terminal. Click here for a picture of a MW loop. Click hereto view a finished picture of this project.



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