[Restoration73]

Select FM, and turn the squelch knob anticlockwise and a loud hiss will be audible. Turn the squelch clockwise to the point where the noise (or the weaker of two signals) disappears. Set the main tuning to obtain the least noise on a signal concurrent with a
maximum S-meter reading. Apart from when you use the set with an external vhf convertor, the only FM signals you may hear will be on the CB bands (27-28 MHz).