Thanks. I'm inclined to lay the blame on the house wiring.

After all the chopping and changing, my TV Netflix wi-fi connection seems to have stabilized to near the same figure as the Roku streaming stick. So, the Devolo mesh wi-fi seems to be doing its job.

(I have Covid-19 to thank for my new 48" OLED tv and 4K blu-ray player. Loads of time for indoor pursuits and the inability to spend money on outdoor pursuits.)


iMac (19,1, 3.1 GHz i5, 12.7.4, 40 Gb RAM); MacBook Air (1.8 Ghz, 8 Gb RAM, 10.14.6, 256 Gb SSD) Vodafone router and Devolo Wi-Fi Extender, Canon TS8351 printer/scanner.