wifi 5gz range issue

bobbee25

Distinguished
Sep 9, 2016
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I have 2 roku setups and am using a tplink 1750 router.
The closest tv shows a signal at the top of the strength range, the furthest tv shows a considerable drop off. So there is a lag loading various applications. Sometimes when I am streaming a video from the computer I start having buffering issues.

What is the best way to boost the signal for the furthest tv.
Should I purchase an extender ? If so which one, don't want to spend much.