Published:2009/6/15 21:16:00 Author:May | From:SeekIC
This preamplifier has a built-in regeneration control boost gain selectivity. C1 is a single or multigang AM broadcast-band tuning capacitor. L1 is a ferrite loop antenna, tapped at about 15 to 25% of total turns. This circuit should prove useful for low-frequency (up to 3 MHz) reception, where a loop would be advantageous to reduce man-made noise pickup.
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