not much! You could go 5.8GHz but that's expensive and not practical in your situation. If you are walking around your apartment, you could try putting in a wired AP on the far end, so the signal would be stronger.
Another thing you can try is to get smarter than the "opponents" with the channels. Remember that there are only 3 over-lapping channels on 2.4GHz - to find out which channel has the least traffic, download Network Stumbler.
Network Stumbler will take over your wireless card, reading the environment, and tell you what other networks are running, their channel, their relative strengths in relation to your card, etc. You will have to reboot the computer, probably, when finished to get back to normal usage.
Just look at what everyone else has set and then pick the one that's up against the least competition and as far away from the most used as possible.
zeroth
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Not sure how you "set the router off the default channel". So, open your browser and enter the address of your router, i.e., http://192.168.1.1 - you will then be asked for a username/password, the default is admin/admin unless you changed it, of course.
That will take you to your router setup screen. You didn't give a lot of info about your setup but you can change the channel there. Just go to the Wireless tab - while there you can also limit to "b" only or "g" only, depending on your computer's ethernet adapter if you want to try and further limit access. Since default is channel 6 choose 1 or 11 - if that's not working try 3 or 9 for example. Just try to get away from something others would choose.
The Network Stumbler I mentioned is a program you have to download from the web. If you can't do downloads, then don't worry about it - it takes some networking knowledge. If you do try to download it, it can tell you as you walk around the room whether you have a strong or weak signal from your router. If you feel this is too advanced, not to worry...and don't worry about the AP and such...we'll talk about it later if you need it.
Try setting the channel first. If I'm not being simple enough tell me and I'll go step by step until we get it setup correctly. zeroth
zeroth
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good.
the problem with another "repeater" is that you have to run a wire, i.e., if you can't get the signal with your computer, you can't get it with a wireless AP either. I've tried the little Linksys repeater (range expander) and it does work but it's probably not the best solution.
In my house, I have a wire run down the attic to the other side, where I have a Linksys WAP54G. Just google that model # and "linksys". I set that up with the same network name and security as my main router and if I walk over there with a wireless notebook, it just takes over...
zeroth
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don't panic. You didn't need to uninstall the program.
As I said in the first post on Network Stumbler, when you want to get back to normal operation, you just need to reboot and the network adapter will work correctly.
zeroth
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I have a notebook that I use as a desktop with cable...just disconnected and came up on the wireless adapter. I'm looking at NetStumbler right now scanning the neighborhood routers...back in a moment, I'm going to change computers...
zeroth
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...so I'm on the notebook now and still watching NetStumbler scan...while typing this!
So, it's not NetStumbler causing the problem...I'm leaning now toward the card. Can you hook up via ethernet cable and run some tests? btw, what router and what ISP, etc?
zeroth
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OK, I'm now on the first computer...and the wireless connection crashed when I tried to look at my router setup page...interesting. So that's why I warned you about NS and rebooting. I'm now going to try and see what I need to do to get it back, which is why I'm running this test in the first place.
zeroth
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So what I've done to get back is to simply repair the wireless connection, which is what rebooting ostensibly would do also.
So, if you can cable up and play around and get the unit stable...I would then suspect the wireless adapter...
zeroth
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