GP4 Shortwave Ground Plane Antenna Vertical GP Antenna 4 Bands 7-14-21-29M. Description: GP4 4-band 1/4-wavelength shortwave GP antenna features working frequency of 7, 14, 21, 28/29M. It is suitable for long-term use outdoors and on the roof. No need to replace the coil to switch the frequency. Exquisite notch technology and superior electrical structure performance makes it a high-efficiency GP antenna. It is simple to lay ground net (more than 6 ground nets; length 2.5m/8.2ft or 5m/16.4ft), with a installation board. In principle, the more ground nets, the better. The recommended installation height is 0.3-0.5m/1-1.6ft. The test version has been used by many users in China for many years, and they are satisfied with the antenna. Easy to set up and to use. It is worth having! Basic Parameters: – Height: 5.65m/18.5 ft – Net weight: 2.3kg/5.1 lb – Wind resistance level: 12 – Power: PEP1000W. Please leave note for your special request e. Please do NOT leave negative or neutral feedback without any contact. We care about our valued buyers, if you have any questions, our Customer Service staffs will be very glad to help you.