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全部话题 - 话题: 75ohm
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l*******s
发帖数: 7316
1
来自主题: CellularPlan版 - 有人给r850接上天线的吗?
我接了。
我发现WILSON WEBOOST 311155 能增强信号,但也不多,大概5-10db。
ebay上有买的,听说50ohm的笔75ohm好。我买的是75ohm的。
x******h
发帖数: 838
2
来自主题: CellularPlan版 - 有人给r850接上天线的吗?
对速度有影响吗?后来终于发现插26频插口信号好些,但速度没变化,本来就有2格变3
格,强个10db的模样。
天线说适合2300-2400,2500-2600,难道对41无效?41是2.5g,刚好是用24xx然后没用?


: 我接了。

: 我发现WILSON WEBOOST 311155 能增强信号,但也不多,大概5-10db。

: ebay上有买的,听说50ohm的笔75ohm好。我买的是75ohm的。

w***w
发帖数: 1552
3
来自主题: HiFi版 - 音箱和receiver今天就到了
3021 Speaker Stand - Silver (SS-01)
2749 16AWG Enhanced Loud Oxygen-Free Copper Speaker Wire Cable - 50ft
3992 High Speed HDMI 1.3a Category 2 Certified Cable
2801 1 PAIR OF High-Quality Copper Speaker Banana Plugs - Closed Screw
Type
2681 3ft High-quality Coaxial Audio/Video RCA CL2 Rated Cable M/M RG6U
75oh
m
2680 6ft High-quality Coaxial Audio/Video RCA CL2 Rated Cable - RG6/U
75ohm
5975 1 PAIR OF High-Quality Copper (non-banana) Speaker Plugs - Pin Screw
T
ype
p****u
发帖数: 1940
4
来自主题: HiFi版 - 问个傻问题啊
that is what i thought
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10236&cs_id=102
3601&p_id=619&seq=1&format=1#largeimage
6ft Coaxial Audio/Video RCA Cable M/M RG59U 75ohm (for S/PDIF, Digital Coax,
Subwoofer & Composite Video)
do you guys think this is the right one?
thanks!
f****i
发帖数: 20252
5
可能哪里split之后,端口没有terminate,反射造成的。Homedepot有75ohm
termination卖,不过你现在已经不需要了。

the
f*******e
发帖数: 8974
6
来自主题: HiFi版 - 同轴线一问
那天看musiland usb声卡评测的时候看那位说还是买好线(75ohm),短一点好
实际上monoprice上价钱很便宜,就是那个shipping讨厌
J********o
发帖数: 17447
7
来自主题: HiFi版 - fiio e17到了
大神在这里看到你了~我刚搞了er4p正准备搞个fiio E17, 你这样说我很欣慰呀哈哈
ER4P价格75ohm变4s加E17会不会更好些?
f*****0
发帖数: 489
8

that much capacitance will be very difficult to drive at high speed. the
typical approach is to use a high current amplifier, and to use a serial
resistor (50 - 75ohm) to dampen the capacitance.
you may want to look into how ADSL modems solve such problems: though
the load there is more inductance than capacitance.
and they can achieve very high speed.
c******k
发帖数: 1140
9
lock in amplifier的channel 1 的输出是analog output, 上面没有标明阻抗值,我就
用一条BNC的cable 就和示波器相连了。当然示波器的阻抗输入可能也是标准的估计不
是50ohm就是75ohm的。
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