Which Windows Client OS are you ruining on your side. Everything here is Windows 7 Home Premium or Ultimate 32-bit or 64-bit. I am in old house built in the roaring 20's. So those power AC Ethernet I can't use since modern wiring was introduce. So thus the need to APs. I can get by with two APs. DD-WRT just kick start mW on Buffalo to 71mW that beats both ESR-9850. The main 9850 is in the bottom of the house where I the garage and family room is located. There are cast iron piping for steam boiler then those two 275 gallon oil tanks. So lots of stuff to hamper my wireless in net closet. In my other home there is no basement nor upstairs. That house only need one unit that's it. I'll be testing there soon in the Summer should be interesting.
Anyway the main ESR-9850 just not keeping the wireless up. I know it has Smart Channel, I've disabled that and it still tries changing the channel. The second one is here on the first floor and it starting to drop again. Funny the Belkin N+ don't drop the connection stream is smooth. DD-WRT might be coming for them I heard. I going to put back into action the TEW-652BRP with DD-WRT on that has Atheros 400MHz, 32MB 8MB Flash combo though it' 10/100 connections with 4,096 max connections like the Buffalo I have. All I need is stable strong N and strong G that's it!
G on the ESR-9850 at times it's slow going. Then it kicks up power. Like you go from D to N then back into D.
Why don't you run a conduit with CAT-6? Older houses should be easy to add that. My house is about 15 years old now. I bought it new and had each room wired with 5E (best at the time).
I've not seen the channel switching issue. My channels are fixed solidly, I've been monitoring it most of the day as I was working. I am mostly G, but will change everything out to 2.4G N soon and use 5G N for media. I live in a populated area, and I can pick up my neighbor's access points at 60% strength on channel 6. I use 1, 6, and 11. 1 for the 7750.
Does a reset (using the reset pushbutton) help?
Unfortunately my work laptop uses XP Pro 32-bit. It's an older Thinkpad T60P. My wife uses the same with an AT&T VPN client instead of Cisco. She's due for an upgrade at work and is supposed to get it soon. That one should have Windows 7. I do have an EEE PC 1000H that I use as well and a much older T43P, both XP 32-bit, that have no issues neither. Both are just web surfing, sofa machines. FWIW, my iPhone has no issue neither on WiFi.
My main systems are hardwired PCs with all Windows 7 Ultimate 64-bit, but they do have wireless cards on their mobo as well. My wireless media PC uses Windows 7 Pro 32-bit. My wireless media machine is running an Engenius EUB-9703 at the moment, which I will be upgrading to the EUB-9801 before the end of the month (promotional sale). I don't forsee problems there, being all Engenius product.
My wired media PC (different room) and my 6TB RAID NAS (WHS) is solid, as expected.
The slow going thing, I have noticed. I resolved that (oddly, don't know why it mattered) by tweaking my notebook adapter's power management setting. I used to timeout on the first ping, 2nd ping would be 2ms, third would be 1ms, and it'll stay at 1ms until I hit ctrl-c and start again and the pattern repeats. With the power setting put to medium, it was solid 1ms. I didn't have this issue with my old Netgear FWAG114.
Overall I'm happy with the Engenius. I will run some torrents over the weekend and see how that goes.
I will try engaging WiFi on my main PC and see what happens over the weekend. It's a b/g only on the mobo. It's an Asus P5W Deluxe running Windows 7 Ultimate x64. I'll need to dig around to find the drivers first.