QUOTE(coolstore @ Apr 17 2012, 08:48 PM)
all should use 50ohm, don't take chance of risk.
RG8 can order, LMR400 too expensive due to high US patent fees, ppl don't like its pricing. multiband panel antenna 50ohm also can order. order in one shipment.
lol... after spending >10k for many experiments, finally manage to get 3G at my place. The 3G tower is about 30-40km away. Signal is too weak that not detactable by any handphone or modem.
Confirmed using 3G 900MHz. Huawei E961 Celcom 3G modem router is not able to capture the signal because it does not support WCDMA 900. Using USB modem like E1762, E160E can.
A good antenna will help significantly to get or improve the signal. Amplifier will further help but it is not a must.
I am not using the antenna in this post, but the antenna i use is only 8dbi and already able to give very satisfied result, so imagine the antenna in this post

. The amplifier boosts another 10dB.
LMR400 cable i ordered from US will come next week. It may help to improve the signal a little bit but not noticeable i think. I use 75/50 Ohm converter.
Signal strength reported in TP-Link MR3420 router is only 48% but the speed is satisfactory and the connection is stable. The antenna is 30ft on top of the roof.
This post has been edited by iiee: May 15 2012, 08:51 PM