Problem with Billion 7800N

I recently purchased the Billion 7800n router to replace the standard O2 Wireless Box. I was happy with the speeds of the O2 Box, but had recently moved the iMac to another room (previously it was wired) and wanted to upgrade from 802.11g to n

As expected, wireless speed increased substantially. However, it's incredibly unreliable. I'll be downloading at upwards of 1MB/sec, and it will suddenly cut out. The iMac wireless reception indicator will jump up and down. Even if I'm not downloading, sometimes web surfing will be pitifully slow. It doesn't seem to affect any other wireless device (iphone/ipad/laptop)

Before, on 802.11g, from the same location, it was not unreliable. Speeds were not great (not enough for HD streaming), but at least it stayed connected.

Before I buy some home plug adapters, any ideas why this might be the case?

Advise/suggestions greatly appreciated.

Cheers!

On the 7800N under advanced>configuration>LAN>wireless, for mode choose "802.11g+n" and choose "auto" for channel id. Make sure wireless security is set to "WPA/WPA2-PSK" and "AES". Also ensure you're using the latest wifi pci/usb drivers on your imac. Let us know if this makes any difference.

Edited by deleted (Thu 28-Apr-11 17:55:52)

I'd also suggest iStumbler to check for neighbours etc who may be competing for the same channel.

I thought running g+n virtually halved your speed compared to n alone. Is that not correct?

In reply to a post by e102gamma:

I thought running g+n virtually halved your speed compared to n alone. Is that not correct?

Nup, has no effect on speeds

Good to know. Thanks.