[mikethedruid]

By the way, depending on the number and location of the taps on the grid section of the variocoupler, and the size of the variable condenser in it's tank circuit, this circuit can be used to receive shortwave as well as standard broadcast. With the rotating winding used to control regeneration, one can actually go from oscillation level regeneration, to degeneration, which can be useful when dealing with very strong local stations. This means of controlling regeneration also provides very fine control. in slight oscillation it can actually pick up CW and sideband too. Let us know how your project turns out.