How to improve signal strength of TC ?

I have replaced my Linksys WRT54G Router yesterday with my TC 1TB.
Setup was a little bit confusing and not Apple like as i expected. However i got TC running with the following setup:
-) the TC is connected to my broadband modem and my main imac via ethernet. TC stands on the floor in the corner of our dinning room.
-) via airport i connected the MB and my second imac
-) Airport connection is set to "802.11n only 2,4 Ghz" with 22 Mbit/s
-) I get good signal strength from TC via my Macbook (located in the same room)70% singal strength according to istumbler
-) i get only 40% signal strength on my new imac which is located 2 rooms away - doors are usually closed between the rooms, and the roomwalls are 15-20 cm brick walls. On my systemmonitor i see max 2 MBit/s transfer rate sometimes even less.
Question:
How can i improve the signal strength of TC? Where is the best place to put it in a room ? Should i avoid placing it on the floor ?
Any other suggestions are welcome

Channel selection can make all the difference, 1 , 6 and 11 are the most widely used by professionals because they have less interference from the other channels. But they are widely used so two AP's can interfere with each other if they are on the same channel and in range of your devices. 2-5, 7-10 are garbage channels, too much interference (can tell from a good sniffer card)...stick with 1 or 11 which ever is less used (or not at all) in your area and mount it as high as you can and centered in the area you are providing coverage for. I found the TC uses its auto-setting pretty well, I have a lot of channels 1 and 6 in my neighborhood and it has always been on 11 when I check its status.
Also walls, doors, metal, windows, coordless phones (2.4Ghz) or 5Ghz) and microwaves all cause signal loss and interference. The density of the material will attribute how much loss there is so yes, brick will cause signal loss.

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wassimfrombeirut wrote:
Dear LaPastenague
Thank you for your reply
i just need to ask you a question; i am a new system admin using mac.
i need a software that can manage my internet bandwidth; qouta; and restriction to facebook; youtube and other web
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the signal strength of a wireless access point by a
java program for a pocket PC (Compaq iPaq)?
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