Poor WiFi since upgraded from an AEBS

I used to have a AEBS, It was the N version but not dual channel. Since I was backing up seperate I decided to get a TC. The TC I got wasn't the newest but it is a N 1Tb dual channel.
I put it in the exact same spot as my AEBS, set it up, but I've definitely noticed that the WiFi performance isn't as good. I use WiFi for it in my house for my iPad 2 and S3, BB playbook.
What could be wrong? Why poor performance, in that the signaliisn't as strong and I get drop outs and very very slow performance, so much on my S3,I just use 3G (H+) as it's faster.
Any help or suggestions please
Thanks

Both Gen 1 and Gen2 AEBS I think should be Marvell wireless. But they had 3 antenna..
The Gen 4 AEBS A1354 and the Gen 3 TC A1355 should also be Marvell wireless but are dual band with only 2 antenna for each band and I think one is shared.. I don't really like shared antenna.
It means orientation is more important.. so keep the TC front led (think of it as a laser beam) aimed directly at the clients.. the antennas are in the edges.. on the 3 faces.. nothing in the back.. nothing top or bottom.
I would do the setup of the TC again. Start from a factory reset.
Is it the correct model for your region?? Make sure the wireless is set to your country.
Make sure power levels are set to 100%.. it should be by default.
To stop the auto band swapping and auto channels swapping set SMB names to 2.4ghz and 5ghz.. which are different. Lock the channels for 2.4ghz particularly .. try channel 1,6, 11 in turn..
Use WPA2 Personal security.
Gen 3 should be ok power supply wise.. they tend to blow the board which you will know because it will stop working.
If it is still bad.. and you don't want to trade it off again.. buy a set of antennas.. I see on ebay you can buy these sets.. get a decent set for 2.4ghz and leave the 5ghz as it doesn't transmit that well anyway. You only need therefore two decent, say 8dbi antenna..
A little bit of drilling you can make it look like a gothic chair or a NASA space antenna. But you will get far superior performance from it.
Tell me if you want to know more.

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I have an Echo Audio Mia-midi soundcard and sound hasn't been working properly for me since upgrading from 2.6.29. Both 2.6.30 and 2.6.31 share the same issue and reverting to 2.6.29 always solves the problem. It seems some driver infrastructure has changed, because the two "Line out" level meters are not available in alsamixer anymore. Instead I have VU-meters for front, rear, center, woofer and side. These can't be set however, and seem to have no impact on the output (they are sometimes set to 100% and sometimes to 0%, but output is silent in both cases).
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Simple mixer control 'Line',0
Capabilities: pvolume
Playback channels: Front Left - Front Right - Rear Left - Rear Right
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Front Right: Playback 0 [96%] [0.00dB]
Rear Left: Playback 0 [96%] [0.00dB]
Rear Right: Playback 0 [96%] [0.00dB]
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