Broadband speeds dropping off when wireless is activated
I've got a strange problem and I'm hoping you can help (might not be so strange but I haven't got a vast knowledge of routers and networks).
Basically, i've noticed my home broadband speed slowing down lately and some speedtests have shown it was around the 0.8Mbps mark. I've just started looking into to it a little more thoroughly today and noticed if I disabled all the wireless transmissions it jumps up to around 8.2 Mbps. The router I have is able to broadcast over the 2.4Ghz and 5Ghz frequencies. I tried the 2.4Ghz only and the speed reached 4.2Ghz, 5GHz only and it stays below 1 Mbps.
These speedtests are all run with an ethernet cable and the router is connected to the master socket in the house.
The router is a Belkin Play Max - F7D4401 v1
Any advice on the matter would be greatly appreciated, I imagine the fault lies with the hardware but I thought it might be worth a try to see if there was some setting that may be causing this or could help.
I've restored the device to it's factory settings to see if that made any difference however the problem remained when I tested it afterwards.