Inverted-V portable antenna for 20m - Neven, 9A5YY

This is my Inverted-V portable antenna for 20m. It consists of : a) Spiderbeam HD 12m fiberglass pole with clamps b) MFJ-1779C center insulator for dipole wire antenna c) two black isolated wires with diameter 1mm2 cca 5m long d) two plastic dog bones e) two ropes f) coax cable Aircell 5 - 50ohm The antenna is resonant approximately at MHz, SWR is about 1.2, was tuned using MFJ-269 Antenna Analyzer and it works fine using just 5W with Transceiver FT-817ND. I use it mostly for portable operation.