My 120 ch.Midland 4001came with a manual for the 40 channel version that just had a sticker on it saying AM/FM 120 Channel so has no information on the -40 +40 +80 knob. I suppose from your chart that -40 must be Band C and +80 Band E?
hi an exciting channel, unfortunately there are fewer people talking on 27 mhz many here in denmark use 160-10 m hf radios where many are active in the uk.here in denmark about 200 that's probably all