With my old internet modem and router I always had problems with RF. It shuts down my internet connection when I cranked up the power, remedy: I placed a lot of ferrite rings which was adequate. The new router/modem does really good. Only one ferrite ring at the AC cable of the modem was enough. I tested up to 50 watts (I never use more) on all HF bands without any problem. On left the photo of my small shack. I added an old HP notebook as second display for digi modes.
My antennas as it is now. On top of the roof the small vertical for 2m / 70 cm, at the right my 6 meter vertical and left my end fed wire as sloper. For the time being it stays that way.