I agree with the others, tuning either the PL-380 or PL-310 receivers can be tricky. I have both and they are well worth the trouble of learning how the tuning works.
Simply pay attention to the > or >> symbols displayed to the right of the frequency. The > is shown when the tuning knob is turned slowly in 1 kHz steps. You'll see >> when tuning in 9 or 10 kHz steps. If you see >> while tuning in 1 kHz increments, immediately remove you finger from the tuning knob and start again.
It requires practice, and with a little patience you will get use to it.
Good luck and DX.
Richard.
Richard Allen 36°22'51"N / 97°26'35"W (near Perry OK USA)