1: The base is used with a 5.6-meter pull-rod antenna, and can be switched between 14MHz-50MHz by adjusting the length of the pull-rod, which requires some hands-on skills 2: Can be adjusted with talent 3: The standard ground grid recommends using 4 3.5-meter 0.5-2.5 square soft wires, and the enhanced ground grid can be matched according to the 1/4 wavelength of the used band -12 portable shortwave antenna only requires a basic M10 thread Part name: M10 antenna base Applicable to: -12 antenna Size: 9 x 3.9cm Model: MSK-12 Pull rod interface: M10 thread Feeder interface: M socket Ground interface: M10 thread Standing wave: Less than 1.5 (ground installation matches the ground grid) Power tolerance: 200 for (FT8 100 for ) Weight: base about 220g, Height: about 90mm Diameter: about 39mm (excluding M female socket) How to use: Connection wayANT end connects to M10 5.6m pull rod antenna, GND end is covered with ground grid and then screwed on the ground into the ground, the ground grid is laid flat in 4 directions, and the base is connected with M male feeder, and the length of the pull rod is adjusted according to the band used. Please pay attention to the radio standing wave table when using (standing wave is as Less than 1.8 as possible) Color: As Shown Material: Aluminum Alloy Package Contents: 1 x M10 antenna base adapted to -12 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.