J　天線 [复制链接]

a = 60 inches
b = 19 inches from the bottom
c = 40 inches from top
d = 3½ inches from bottom where the coax is connected.
g = 1 inch gap (no connection).

效果如何？？？？？？？？

'

a = 60 inches
b = 19 inches from the bottom
c = 40 inches from top
d = 3½ inches from bottom where the coax is connected.
g = 1 inch gap (no connection).

'
freq.? gap?

为什么都喜欢做j天线呀!
其实效果并不怎么样呀.

'

freq.? gap?

'
6m band ,gap=d

效果很不错！我用32mm的pvc和6平方的铜线做了二付这样的天线，很好用。