A limiting resistor of 10 k is connected to pin 9 of the MC3361. I have bent to follow
pin 9, so that only a minimal amount of solder is needed. The resistor is mounted on top of the IC and fixed with a
drop of glue from a glue gun.
Because the baseband audio contains an IF component of 455 kHz, a simple RC filter has been created using a 2.2 n capacitor.
Together with the resistor this forms a lowpass filter with a cutoff frequency of about 7 kHz. One lead of the capacitor is
connected to the resistor. The other lead is connected to the shield of the IF coil (ground).