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旧 Apr 11th, 2010, 22:00     #1
ljnzxync
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默认 兽兽我家的HD室外天线

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旧 Apr 11th, 2010, 22:07   只看该作者   #2
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默认

我以为兽兽出新片了呢
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旧 Apr 11th, 2010, 22:16   只看该作者   #3
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Thumbs up 真牛!

架子怎么做得?铝合金吗?
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旧 Apr 11th, 2010, 22:21   只看该作者   #4
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默认

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作者: 千金顶 查看帖子
架子怎么做得?铝合金吗?
同问,另外楼主家大概在什么位置?
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旧 Apr 11th, 2010, 22:30   只看该作者   #5
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默认

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作者: 千金顶 查看帖子
架子怎么做得?铝合金吗?
那种架子有卖的。应该是铁支的,看到人家的生锈了。
LZ两条电缆下来麻烦,手动切换?
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旧 Apr 11th, 2010, 22:42   只看该作者   #6
ljnzxync
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默认

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作者: gzkl 查看帖子
那种架子有卖的。应该是铁支的,看到人家的生锈了。
LZ两条电缆下来麻烦,手动切换?
铁架子不是买的,是搬进来时就在那的.两条电缆并成一条进电视的
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旧 Apr 11th, 2010, 22:46   只看该作者   #7
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默认

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作者: jjzzbb 查看帖子
同问,另外楼主家大概在什么位置?
密市西
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旧 Apr 11th, 2010, 22:50   只看该作者   #8
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默认

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作者: ljnzxync 查看帖子
铁架子不是买的,是搬进来时就在那的.两条电缆并成一条进电视的
可以先并,引一条下来。省条线,效果一样。最好还是加个放大器。
BTW,见过横装的天线,也见过向天装的。
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旧 Apr 11th, 2010, 23:04   只看该作者   #9
ljnzxync
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默认

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作者: gzkl 查看帖子
可以先并,引一条下来。省条线,效果一样。最好还是加个放大器。
BTW,见过横装的天线,也见过向天装的。
就是一条下来的,电视在地下室,不用放大器就很好了。
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旧 Apr 12th, 2010, 07:00   只看该作者   #10
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默认

咋个并法?能说说么?谢谢
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旧 Apr 12th, 2010, 09:51   只看该作者   #11
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默认

有卖2进1出的, 和splitter正好反过来.

怒放的生命
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旧 Apr 12th, 2010, 10:11   只看该作者   #12
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默认

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作者: f2a 查看帖子
有卖2进1出的, 和splitter正好反过来.
这2个天线合下来.信号不会差么?这玩意儿没玩过...如果真能搞2个合并成一个信号.这些高清台都能一网打尽了.现在只能一个天线两边蹭信号

f2a给个名称让我找找
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旧 Apr 12th, 2010, 10:20   只看该作者   #13
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默认

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作者: FireROR 查看帖子
这2个天线合下来.信号不会差么?这玩意儿没玩过...如果真能搞2个合并成一个信号.这些高清台都能一网打尽了.现在只能一个天线两边蹭信号

f2a给个名称让我找找
当然了, 电视这种频率, 甚至于任何的接头都会有损耗, 一般的估算可以用一个接头1db, 一个合并器3db来算

天线架到了这么高, 最大的提升在乎信噪比大大的加强了, 起码10db以上, 因此可以加一个宽带的低噪低增益的室外放大器置于铁架上面

另外请问楼主, 防雷怎么做的?

[仓廪实而知礼节 衣食足而知荣辱]
在苍茫的大海上,狂风卷集着乌云。在乌云和大海之间,流狼像黑色的闪电,在高傲地飞翔......
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旧 Apr 12th, 2010, 10:32   只看该作者   #14
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默认

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作者: -GoGoGo- 查看帖子
当然了, 电视这种频率, 甚至于任何的接头都会有损耗, 一般的估算可以用一个接头1db, 一个合并器3db来算

天线架到了这么高, 最大的提升在乎信噪比大大的加强了, 起码10db以上, 因此可以加一个宽带的低噪低增益的室外放大器置于铁架上面

另外请问楼主, 防雷怎么做的?
你给说个名字呗.
我说的是: 比如数字台4-1.一个天线信号好,一个不好.两个信号怎么叠加?不会是手工切换吧?

至于雷.你没看那个钢铁架子直通地面么....
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旧 Apr 12th, 2010, 11:04   只看该作者   #15
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默认

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作者: -GoGoGo- 查看帖子
当然了, 电视这种频率, 甚至于任何的接头都会有损耗, 一般的估算可以用一个接头1db, 一个合并器3db来算

天线架到了这么高, 最大的提升在乎信噪比大大的加强了, 起码10db以上, 因此可以加一个宽带的低噪低增益的室外放大器置于铁架上面

另外请问楼主, 防雷怎么做的?
看图, 只能电视机来硬抗, 看能扛住否?
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旧 Apr 12th, 2010, 11:16   只看该作者   #16
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默认

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作者: FireROR 查看帖子
这2个天线合下来.信号不会差么?这玩意儿没玩过...如果真能搞2个合并成一个信号.这些高清台都能一网打尽了.现在只能一个天线两边蹭信号

f2a给个名称让我找找

叫coupler , 这有
http://www.xtek.ca/Winegard-CC-7870-...041_p_344.html

这是把两个天线合成1路信号的.

gta的为了收local和buffalo两路信号,有的就是装两个天线分指不同方向然后把信号合并起来.或者是买马达,换台的时候天线会移动指向不同方向.
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旧 Apr 12th, 2010, 11:26   只看该作者   #17
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默认

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作者: FireROR 查看帖子
你给说个名字呗.
我说的是: 比如数字台4-1.一个天线信号好,一个不好.两个信号怎么叠加?不会是手工切换吧?

至于雷.你没看那个钢铁架子直通地面么....
我没做过将两个室外天线的信号迭加, 觉得不MAKE SENSE

那个钢铁架子的最高尖端我只看到一副天线, 没有避雷针啊, 春天已经来了, 雷会很多的

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作者: googlebot 查看帖子
看图, 只能电视机来硬抗, 看能扛住否?
肯定抗不住的, 同轴电缆的线不够粗, 一个小雷就打糊一片, 电视机内主板上的避雷器件几乎可以肯定是一次就烧糊的, 牺牲自己保护主板, 然后从电视机的电源线, 墙上的电源插座, 天线下来的同轴电缆, 全部糊掉
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旧 Apr 12th, 2010, 11:46   只看该作者   #18
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默认

造型有点象神6,会不会一生火做饭,就冲天上去拉

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旧 Apr 12th, 2010, 11:48   只看该作者   #19
f2a
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默认

这么高的塔一定要考虑避雷,要不然后果严重. 可能找人装避雷价钱不便宜吧.
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旧 Apr 12th, 2010, 11:58   只看该作者   #20
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默认

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作者: f2a 查看帖子
叫coupler , 这有
http://www.xtek.ca/Winegard-CC-7870-...041_p_344.html

这是把两个天线合成1路信号的.

gta的为了收local和buffalo两路信号,有的就...
这个合成1路信号的.效果好么?我也觉得不make sense... 不同频率的还行.同频率的应该有影响才对.希望lz再post点信息出来
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