OK guys, I started on the air in 2016 then took a 3 year break(other things interrupted). So I don't have alot of time in the hobby. I have a 20 meter only inverted V in my backyard. Last night I fired up my little yaesu 450D when everything was dead in 20 meters, I decided to see just what was there on 40 m band. The noise floor was at 0-super quiet so I figured it's because you have no 40 meter antenna dummy. The signals started coming in. Turks and Caicos has a small pileup on 7.175. the caller was about S1, but because the noise floor was zero, I could hear him perfectly. And there were several other frequencies coming in. OK here's the dumb question, how am I receiving 40 meters on a 20 dipole? I never did key the mic to make contact.