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 watts (FT8 100 for watts) 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 o Color: Silver Material: Aluminum alloy Package Contents: 1 * 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.