In this third video in the Resistors series, we will discuss the purposes of the Grid Leak and Grid Stopper Resistor, and see how they relate to the design of the Fender Signal Input Circuit, which is more complex than most people realize. Topics of discussion will include Input Impedance, Parasitic Oscillation, Tube Capacitance, Low Pass Filters, Radio Frequency (RF) Filtering, Tube Bias, and Blocking Distortion.