In answer to the first question - yes just go into the Hub settings and click the "disable wifi" boxes for the 2.4 and 5 GHz bands.
It shouldnt drop on a wired connection.
First do a quick check that all of your coax connections are in nice and "finger" tight at the Hub and wall box and at any splitters/attenuators/etc with no “unterminated loose ends, and that the internal wiring is ok with no kinking or chaffing. Also check that all looks good with the outside cabling and wall box.
Then do a 60 second Hub “pinhole reset” with the Hub "switched on" throughout – then release the pin and leave 10’ to stabilise.
Then, post up your Hub/network connection details and someone will check to see if there is a problem there. In your browser’s URL box type in http://192.168.0.1 (or http://192.168.100.1 - if in modem mode) and hit return. On the first page up [there should be no need to login if you have done so before] click on the “router status” icon at top right (SH2’s) or text at bottom-middle of first page up (Hub3) and then copy/paste 3 FULL sets of data onto here – from the Downstream, Upstream, & Network Logs pages. Don't worry too much about the formatting it can be easily read & DON’T include personal data or MAC addresses - blank them out - if you copy/paste the data, the board software will do this for you (you may need to click the "submit" button a second time).
Also, in the meantime. Set up a free “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take an hour or two to start seeing a sensible picture.
Actually you'd better turn off your life if you want to avoid damaging ionising radiation. You get more per day in most houses because of natural radon decay in the bricks and motar of buildings and from the background cosmic radiation from the rest of the universe. But go ahead and lose all the advantages that modern means of communication offer for the sake of a psuedo-scientific piece of nonsense about wifi and mobile phone technology.
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