If I connected a capacitor between base of the transistor and the point where one end of an inductor, capacitor and the resistor from +ve meet (this capacitor is in parallel with the base resistor carrying the +ve voltage), does this capacitor go in parallel with the capacitor from base to ground when I calculate the capacitance for a low pass filter?
if I am losing you here, I am assuming that a low pass filter is present in the circuit, but the part that is interesting is that I get somewhat better results when I add more capacitors to the circuit.