Hi, thanks for the encouragement and feedback.
[I’ve not used a CB radio in years but I vaguely remember that in my youth (UK) the squelch on the CB radio was adjustable. One turned the squelch knob to adjust the permitted input level like a gate threshold. If you were trying to listen to someone with a poor transmitter, behind the hill, far away or whatever then you’d have to put up with background noise or you’d miss them.]