Build A 9 dB, 70cm, Collinear Antenna From Coax

By N1HFX http://www.rason.org/Projects/collant/collant.htm https://www.google.com.br/search?q=Build+a+Rugged+Half-Wave+Coaxial+Antenna&newwindow=1&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwioo5m-q5bNAhXI7CYKHYAEDbkQsAQIVw&biw=1280&bih=601#tbm=isch&tbs=rimg%3ACUfR-XUgwQGTIjj_14xD1RKrxSlXBiDoc94Sw8IItRZrRGrtuCcCMzS-08OJawjSdM75JLV_1dalO5qGLqlo5yywsQbCoSCf_1jEPVEqvFKEZoMdhLifpwiKhIJVcGIOhz3hLARnxCn0zKg2LUqEgnwgi1FmtEauxHH_16pWIYhJ2yoSCW4JwIzNL7TwEe8B7bwPFJA2KhIJ4lrCNJ0zvkkRVqnzQNmS0s8qEgktX91qU7moYhGKKTyl3ggOVCoSCeqWjnLLCxBsETubm2J6m10D&q=Build%20a%20Rugged%20Half-Wave%20Coaxial%20Antenna&imgrc=_