Homebrew EH antenna for 40M band

This is my homebrew EH antenna for 40M band. This antenna has the problem with a strong returning RF in to coax. This is the reason why i never tryed this antenna in a real outdoor conditions. Until now i did not solved this issue with RF. There is a big problem with resonant frequency instability due to this. Special thanks to Larry D Brown (silent key) ... btw, sorry for my english