31. The intent was to develop an alternative receiver circuit that required fewer tuned circuits than the superheterodyne receiver. 32. Changing the DC voltage across the varactor changes its capacitance, which changes the resonant frequency of the tuned circuit . 33. One of the windings of the transformer had a variable capacitor connected across it to make a tuned circuit . 34. This reduced the impedance loading of the tuned circuit , as well as improving the impedance match with the detector. 35. The back shunt was a second tuned circuit consisting of an inductor, a capacitor, and load resistor in series. 36. The antenna is an integral part of the tuned circuit and its reactance contributes to determining the circuit's resonant frequency. 37. While stubs function as resonant circuits, they differ from monotonically with frequency after resonance as in a lumped tuned circuit . 38. In the RF designs shown on this page, a tuned circuit is between the anode and the high voltage supply. 39. Fractal inductors and fractal tuned circuits ( fractal resonators ) were also discovered and invented simultaneously with fractal element antennas. 40. They typically have a long, low appearance, with a flip-up lid for access to the vacuum tubes and tuned circuits .
