Slow wifi with old router as AP in another house

[Filingo]

I set up an old router (N wifi)as an AP in my house. It worked fine here and I got 40 Mbps download speed on WiFi out of 70 Mbps when close to the router.

 

I then gave it to a friend where he uses power line instead of direct Ethernet from ISP router to this old router.

 

His download speed is 3 Mbps from this router.

 

He has fiber optics in his house. 300 Mbps download speed when wired.

 

The powerline spec is 1 Gbps.

 

Also he connects by cable his tv to this old router (so this router both acts as AP and switch)

 

What could cause the issue? I have a few suggestions but perhaps there are more:

 

1) the powerline signal is bad in his house electrical circuit and that's what causes the issue

 

2) the 300 Mbps speed is too much for this router to handle and it makes it drop speed so much from some reason?

 

3) there are other signals interrupting this router signal, maybe channel or the fact that it uses the same SSID/password

 

4) there's a tv connected to this router as well so it takes all the bandwidth of the AP and I need to connect the power line to a switch and from there connect it to tv and the router separately?

 

Anything else and ways to improve it if possible?

 

Thanks!

 

 

 

 

 

 

[BondiBlue]

Powerline doesn't always work well. In my experience it very rarely works well. Is there any way your friend can directly connect the two with an ethernet cable? 

[Filingo]

19 minutes ago, BondiBlue said:

Powerline doesn't always work well. In my experience it very rarely works well. Is there any way your friend can directly connect the two with an ethernet cable? 

Need to pull a cable and that's the plan(he ordered a cat6 solid copper bulk cable that needs to arrive)

 

It's just that when he's using the same power line with Ethernet cable directly plugged to the device, it actually get high speed and low ping

[SpookyCitrus]

Wireless N routers are very old and most if not all are incapable of Gigabit speeds, if the rest of your friends equipment is modern and new(rated for fiber/gigabit speeds) then your friend will need to get a Wireless AC or AX router/access point, pairing a Wireless N router with a bunch of new fiber/gigabit equipment is just going to cause problems and limit his network speeds. If your friend wants to get their full speed over WiFi they need to get a current gen router/AP with WiFi 6(Wireless AX). Or just stick with the powerline adapters if they are working properly.