Please help, I have been out three times today in three different locations , one in the country max range was about thirty meters, then on a high field no wires cables or anything , kept getting strong interference and loss of signal , then out in country again , and kept getting weak signal at about 30 meters, on all occasions. What is happening ? I am starting to lose confidence fast , I have never managed to get further than this without a warning , although all bars are showing max ? Any help is very welcome