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Old 30th May 2022, 3:26 pm   #3
G6Tanuki's Avatar
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 11,563
Default Re: AM Suppression in SW Receiver

The potentiometer creates an adjustable centre-tap on the coil, which allows you to balance the detector for any slight variations in things like the characteristics of the diodes.

Some similar designs will also include a small adjustable trimmer-capacitor from one side of the pot to ground, so you can balance out any capacitive inequalities. Which side of the pot would need the capacitor will depend on circuit layout.
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