成功架设8分之5波长4波段倒V天线

成功架设8分之5波长4波段倒V天线 成功架设5/8波长4波段倒V天线 根据无线电文献以及网上的资料,一般的短波倒V天线,多采用1/4波长来制作各波段的振子,单振子,下同,,在架设高度不小于6m,振子夹角为90度至120度之间时,通过1,1的巴伦馈电,通过对振子的修剪,均可调整到比较理想的驻波比和使用效果,更关键的是,节省了架设的空间。 但是,很多朋友由于受到架设空间的制约,选择了1/4波长振子的偶极天线,使用没问题,只是增益较低,不大于0DB,2.15dbi,。 我住的楼房的楼顶比较宽阔,为了提高天线的增益,更好的让天线发挥它的效率,经过对楼顶的观察,具备升级倒V天线的空间。 经过仔细的研究分析BD2BH编译的《经典线天线》中陷波共线天线使用3/4波长振子的理论,决定制作5/8波长倒V天线。10m、15m、20m采用5/8波长振子,40m采用5/8波长加感缩短阵子,振子太长了,不好架设,加感缩短了二分之一,就这样有效长度也达到了15m多,比1/4振子长了5m还多呢,。 此倒V天线,理论上有3DB的增益,会很大程度上,提高QSO的成功率。 振子材料的选用,QE-348音响传输线,无氧铜芯,电ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's 气传输缩短率0.90左右, 振子材料下料长度,10m段,29.60MHz, ---6.84m+0.20m,预留修剪量, 15m段,21.40MHz, ---10.51m+0.20m,预留修剪量, 20m段,14.20MHz,---15.84m+0.20m,预留修剪量, 40m段,7.10MHz, ---15.84m+15.85m,直径40的pvc管上密绕126T,+0.20m,预留修剪量, 巴伦,1,1磁环巴伦,我的天线支撑杆顶部使用了15CM PVC管,将巴伦做进了支撑杆的顶部,馈线从管中穿过,底 部穿出, ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's 说明,本天线未作专门的避雷针,只是在馈线上安装了 钻石牌避雷器,直接同楼顶避雷网连接,雷雨天将馈线拔下 来,扔到窗外。原因是架设天线的楼顶三个方向有高于本建 筑5层以上的楼房,距离都不大于500m。 ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's 由于调试的原因,拍照片时,未安装15m段振子。 振子夹角约为95至105度,目测,,各波段振子水平夹角均 不小于40度。 ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's 上图中为新安装架设的5/8波长倒V天线和我的10m段GP天线以及我的UV双段一波长天线合影。 调试工作,从高频段至低频段进行,经过多次的修剪,10m段驻波1.1,阻抗54欧姆,、20m段驻波1.2,阻抗55欧姆,、40m段驻波1.2,阻抗55欧姆,。 通过同3、4、5、6、7区的朋友在40m、20m段使用10W的发射功率通联测试,接收效果和发射效果都比较理想,双方的信号报告均在59以上,15m还没有安装,10m段今天没有传播,无法进行测试。 补充内容,今天10m段有传播了,只用10W功率,同新疆的BD0BB进行了通联,对方给出了59的信号报告,接受对方有59+10db的信号,之后通联了6、7区的3位友台,ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's 效果比较满意。 最大的特点,背噪比原来的GP天线能减小2S左右。 具体到同1/4波长倒V天线的对比测试,今天未能进行,没有架设1/4倒V的空间了,,有机会到野外同一时间用以地点,分别架设一套倒V进行测试一下,再补充测试结论。 天线的架设工作就这样结束了,感谢BD2BH以及刘燕北老师所编译《经典线天线设计》提供的技术支持。 ships of 72 and a half the Harbour, like room Tao Yuan. Triangle at the cemetery (Shanghai, Nanjing and Hangzhou), and the small triangle (Soviet Union, Ka, Lake) where the hinterland, at the junction of Jiangsu, East, South and west sides respectively, and jiaxing in Zhejiang Province, Wuzhen, Nanxun town and connected. After the liberation, 17 townships, Yan Tomb, provided there is a town, District Administration had in town. A unique geographical environment, has become the military's battleground. On November 5, 1937, Japan 10th army landed in Hangzhou Bay, North Bay, on November 12, Shanghai fell. Part of the Japanese army to the North along the flood of jiaxing railway, Jiujiang road, invaded Wu Jiang. On November 18, the Japanese army occupied Wujiang city. Stationed in Wujiang's