To obtain a radio antenna, get an old radio by having an antenna, unscrew it and open it up Identify the point of attachment in the antenna for the radio, unscrew it and pull the antenna out.知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。Push just a little cotton ball to the idea of the pen. The