收音机外接短波框性天线制作图解与流程
1、准备制作材料
![](/wp-content/uploads/images/2023/08/04/25538599475a42f3957182d2a5525a82_41rzlybgfyy.jpg)
2、bryan帮助加工3.5mm插头
![](/wp-content/uploads/images/2023/08/04/2d66e88754014ec5bd625863bb47df27_qfleieneql3.jpg)
3、3.5mm插头特写
![](/wp-content/uploads/images/2023/08/04/d185e86331f844e781c5ad5e53dcff8b_mllkw0ze4s5.jpg)
4、外框雏形
![](/wp-content/uploads/images/2023/08/04/31a11cebe7bd418e84d5fe24023ee4c7_idzcp0ldlmp.jpg)
5、内环
![](/wp-content/uploads/images/2023/08/04/17ac110fcbbd4d7cad3b7f543558c9d1_3pkkjm0ryl3.jpg)
6、内环接头
![](/wp-content/uploads/images/2023/08/04/549c622370724a64b2c678a7bb86984f_pzbixa5fyey.jpg)
7、天线中部借口
![](/wp-content/uploads/images/2023/08/04/ceec4cd0a05647d796726cb09551e5b4_nokwpqgkcxl.jpg)
8、横撑右侧特写
![](/wp-content/uploads/images/2023/08/04/8f2815a11c3a4eb5bb07c15b1ae0639b_44joxz2ylmd.jpg)
9、横撑右侧特写2
![](/wp-content/uploads/images/2023/08/04/13446ec891bc41dbbd767d1d4b89d771_veekrw1szzs.jpg)
10、天线外框接头
![](/wp-content/uploads/images/2023/08/04/c5150ce2817c400d89c4f00e052ab6f9_clolw4e4uxv.jpg)
11、空气可变电容
![](/wp-content/uploads/images/2023/08/04/67065faeab344f3fa90279d30309c421_b0k1wwsu3xb.jpg)
12、空气可变电容侧面
![](/wp-content/uploads/images/2023/08/04/a7b0fd2db3ee428eb9928f3f297e997d_4wy0e1dhke4.jpg)
13、短波框型天线全貌
![](/wp-content/uploads/images/2023/08/04/96c70659075a45daa6d8feb5d01decac_arwmadxzria.jpg)
14、厚实持重的600配短波框型天线
![](/wp-content/uploads/images/2023/08/04/c02170e753c447059aaf101e68e9d1e3_yk0ds4vwbp3.jpg)
制作天线的过程中还出现了一个小插曲,天线刚制作完成时,发现旋转可变电容收音机信号丝毫没有增强或减弱,固定空气可变电容上部的螺母和定片连在一起了,致使电容失效。发现问题后,果断卸下该螺丝,再试验,成功了,随着旋转可变电容,收音机的信号出现了强弱变化!
现在天线杆上还留有当时拧螺丝的小孔。
![](/wp-content/uploads/images/2023/08/04/891c872b19114dad90ec4a1ee02aa070_riglg1kncqd.jpg)
具体效果
该天线在改善短波(4—16兆)收听方面,效果不错,胜过随机赠送的外接软天线。
七、制作成本
晒一晒制作天线的成本:
① 2cm*2cm的木方一根:5元
② 截面积2平方,直径为1.78mm的漆包线4.5米:13元
③ 3.5mm单声道插头:2元
④ 网购复旦牌单联空气可变电容(加邮费):47元
⑤ 2米长的50欧姆同轴线是bryan友情赞助的,Free。三克油,bryan,(*^__^*) 嘻嘻……
最终成本是:67元