TP-Link TL-WA801N 300Mbps Wireless N Access Point

[GoodCook]

I am trying to extend my sky router to have a good signal  upstairs in our home and also to have a signal in the garage.

I have bought TP link WAP that can either be used as routers or network extenders.

How ever I use them seems to break the WIFI / internet connection for the main router.

as soon as they are plugged in the wifi slows from 140mbps to 19mbps if we are lucky and anyone upstairs in the house complain that the internet keeps dropping off and is laggy.

I have tried all sorts.  I have renamed the SSID, I have had it as its own router, I have reserved IPs I have set IPs ,  used dynamic IPs but everything breaks the main internet.

Can some one help me out here?

All I want is a decent sky connection throuought the house and an extended connection in the garage.

Regards

[TimmyBGood]

@GoodCook 

I've had considerable success with those units as budget wireless access points on the end of ethernet runs, but would think they are far too cheap to be successful as wireless extenders: they are also using a now obsolete wireless standard (802.11n) which is fifteen years old.

Note for some inexplicable reason the later hardware revisions ship with active DHCP, and that needs switching off before deployment.