WRT600N Wireless n 5Ghz range much less than the second channel 2.4 Ghz

I just bought the WRT600N a few days back and have finally got it working so that all my devices (mac mini wireless g, i2eye Phone wireless g, thinkpad wireless b, etc... and Mac book pro wireless n, apple tv wireless n etc...) connect well and are working well from a close range. I went thru some of the same discoveries as some on this forum went thru. The 2.4 Ghz was the most annoying. I had to manually set the channel to 6 to get a number of devices to connect. That was after quite a bit of frustrating debugging.
My current setup:
All SSID's are set to specific names Use Mac Filtering without any security.
The 5Ghz channel is set for Wireless n mode only (Would like to get a dedicated 300 MB/s connection for the n devices. That is why I bought the dual channel router)
All other settings are default
I see it set on Wide channel 40MHz channel 38
Standard channel 36
broadcast enabled
The 2.4Ghz is set in mixed mode
It is set to Standard 20Mhz with a fixed channel 6
broadcast enabled
The problem I am having is as I go into my bedroom upstairs or in my basement the Wireless n 5Ghz channel is at best flaky and either the signal is dead or I get dropped connections. In many cases you can't even see the SSID. On the other hand the 2.4 Ghz signal works from all these locations fine and with even the furthest points in the house getting atleast 3 bars out of 5. However, many of these far devices are being used for streaming video and the b or g network is unacceptable.
I used to have a dlink mimio router and the b g network from that was as strong if not better. It goes without saying that I have scanned the forum for all possible suggestions.
The firmwares are the latest and greatest and the router now is sitting on top of a book case that gives it a good height and visibility. It however is in one corner of the house and I don't have a choice there. Fundamentally the problem is that the wireless n is not working from the same places the wireless g signals are strong?? I have played with changing the settings on the 5 GHz channel but nothing seems to work. My apple tv in the basement can't even see the wireless n ssid?? while the wireless g has almost full strength. That said when you are within a certain distance of the router the wireless n works well and is great. So it is clearly a range issue??
If I don't hear from anyone this one is certainly going back...
Thanks, MM
Message Edited by mmutreja on 03-09-2008 02:34 PM

There is no channel 161 for the Linksys's N portion. If you choose Wideband, it offers you 3 choices... Auto(DFS), channel 38 or channel 46 and that's it.
Message Edited by Chuck_IV on 04-07-2008 11:51 PM

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