중국 라이오 보이 자작품 http://www.haodiy.net/a/jishuwenzhang/shouyinjiwuxiandianDIY/dianziguans/2015/0618/7902.html http://www.haodiy.net/a/jishuwenzhang/shouyinjiwuxiandianDIY/jingtiguans/2014/0922/7567.html http://www.haodiy.net/a/jishuwenzhang/shouyinjiwuxiandianDIY/jingtiguans/2013/0212/6208.html 矿石收音机 真空管收音机 (EOM)