Macbook wireless connection

My macbook has recently started having problems with connecting to every wireless network I normally use. When I move more than approximately 10 feet away from any wireless router my signal strength plummets. When I ping as I move away I lose most, if not all, of the packets, and some of the packets have taken as long as 1 second to return. I think that I have tried every single suggestion I have found on any help site. I have been using 10.4.11 since it became available, but I don't specifically recall having problems since this change. I just did an archive and install from my install disc back to 10.4.6 and updated to 10.4.9 because that seems to be the OS that nobody reports having problems with. Even with this, the problem persists. Might my airport card be damaged or loose? Any suggestions will be appreciated. I'm desperate to the point of performing surgery.

Hi all,
I'm having issues with WiFi too... When I'm at home and WiFi is not strong enough (too far away, too much walls...) connections seems to be full 4 bars, dropping to 2, to 1 back and forth...
Sometimes turning it on, it's not finding the WLan for autoconnect, or suggests me to type in the password again... Very strange: Sometimes it says that none of my preferred networks are available and suggests to connect to others. In the list I can find my own network again!!! Choosing it mostly leads to connection timeout...
I have similar problems at other locations, but I'm not sure if I'm in the WiFi range all the time (although I think so)...
I did also think, sth. with my router (WRT54GL with Tomato firmware) is not OK or it's not positioned very well in my flat... Experimenting with it, I found kinda sweet spot and connection was ok, but all of a sudden, there was this weird thing:
Testing with the ping response time and packet loss, I confirmed, that response time is <3ms average and no packet loss... But afterwards the ping response time fluctuates back and forth:
64 bytes from 192.168.1.1: icmp_seq=964 ttl=64 time=0.883 ms
64 bytes from 192.168.1.1: icmp_seq=965 ttl=64 time=0.895 ms
64 bytes from 192.168.1.1: icmp_seq=966 ttl=64 time=0.928 ms
64 bytes from 192.168.1.1: icmp_seq=971 ttl=64 time=2786.449 ms
64 bytes from 192.168.1.1: icmp_seq=972 ttl=64 time=1786.363 ms
64 bytes from 192.168.1.1: icmp_seq=973 ttl=64 time=786.265 ms
64 bytes from 192.168.1.1: icmp_seq=974 ttl=64 time=0.916 ms
64 bytes from 192.168.1.1: icmp_seq=975 ttl=64 time=0.883 ms
64 bytes from 192.168.1.1: icmp_seq=976 ttl=64 time=0.933 ms
64 bytes from 192.168.1.1: icmp_seq=977 ttl=64 time=1786.283 ms
64 bytes from 192.168.1.1: icmp_seq=978 ttl=64 time=786.423 ms
64 bytes from 192.168.1.1: icmp_seq=979 ttl=64 time=0.874 ms
64 bytes from 192.168.1.1: icmp_seq=980 ttl=64 time=0.837 ms
64 bytes from 192.168.1.1: icmp_seq=981 ttl=64 time=3.301 ms
64 bytes from 192.168.1.1: icmp_seq=982 ttl=64 time=1787.292 ms
64 bytes from 192.168.1.1: icmp_seq=983 ttl=64 time=787.165 ms
64 bytes from 192.168.1.1: icmp_seq=984 ttl=64 time=0.864 ms
64 bytes from 192.168.1.1: icmp_seq=985 ttl=64 time=0.884 ms
64 bytes from 192.168.1.1: icmp_seq=986 ttl=64 time=0.815 ms
64 bytes from 192.168.1.1: icmp_seq=987 ttl=64 time=1786.229 ms
64 bytes from 192.168.1.1: icmp_seq=988 ttl=64 time=786.278 ms
64 bytes from 192.168.1.1: icmp_seq=989 ttl=64 time=0.929 ms
64 bytes from 192.168.1.1: icmp_seq=990 ttl=64 time=0.770 ms
64 bytes from 192.168.1.1: icmp_seq=991 ttl=64 time=0.929 ms
64 bytes from 192.168.1.1: icmp_seq=992 ttl=64 time=1784.993 ms
64 bytes from 192.168.1.1: icmp_seq=993 ttl=64 time=785.073 ms
64 bytes from 192.168.1.1: icmp_seq=994 ttl=64 time=0.828 ms
64 bytes from 192.168.1.1: icmp_seq=995 ttl=64 time=0.936 ms
64 bytes from 192.168.1.1: icmp_seq=996 ttl=64 time=0.881 ms
64 bytes from 192.168.1.1: icmp_seq=997 ttl=64 time=1785.504 ms
64 bytes from 192.168.1.1: icmp_seq=998 ttl=64 time=785.865 ms
64 bytes from 192.168.1.1: icmp_seq=999 ttl=64 time=1.349 ms
64 bytes from 192.168.1.1: icmp_seq=1000 ttl=64 time=0.902 ms
64 bytes from 192.168.1.1: icmp_seq=1001 ttl=64 time=0.957 ms
64 bytes from 192.168.1.1: icmp_seq=1002 ttl=64 time=1783.032 ms
64 bytes from 192.168.1.1: icmp_seq=1003 ttl=64 time=783.530 ms
64 bytes from 192.168.1.1: icmp_seq=1004 ttl=64 time=0.940 ms
64 bytes from 192.168.1.1: icmp_seq=1005 ttl=64 time=0.959 ms
64 bytes from 192.168.1.1: icmp_seq=1006 ttl=64 time=0.867 ms
64 bytes from 192.168.1.1: icmp_seq=1007 ttl=64 time=1781.236 ms
64 bytes from 192.168.1.1: icmp_seq=1008 ttl=64 time=781.330 ms
64 bytes from 192.168.1.1: icmp_seq=1009 ttl=64 time=1.308 ms
I thought, this was the routers fault, but after restarting the MacBook, it's all fine again!
Please note that these weird ping times came up when I was in the same room or even a few feet away from the router! Also The Wifi Symbol frequently reduced signal strenght by 1 to only 3...
I really don't know what causes this. Especially because this is not makeing problems all the time... I.E. connections is quite good sometimes and even in a big room with only one small access point hanging around for several douzen people, connection might be good and fast...
Best Regards,
kuetsch

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