If you have the option (and I know that not everybody does) connect the Tablo to your new router via Ethernet. That way, you wouldn’t need to change the WiFi.
This article might help. If you want to switch to the new WiFi, you could try switching from WiFi to Ethernet and then back again.
In addition to what @KGBnut said, if you want to keep wifi, just set up the new wifi router using the exact same SSID(s) and password(s) as the old one once you disconnect it. All your devices should, in theory, then just reconnect to the new router.
Switching to Ethernet is possibly 1) a temporary fix or 2) a longer term permanent fix.
In the short term, it’s running either the antenna coax or the Ethernet cable across a much used path on the floor. Or in the longer term, routing Ethernet under the floor to near the antenna cable.
But switching to Ethernet and back again could use a temporary Ethernet run. I’ll look into that.
@mgbirdsall, Congratulations on getting Gigabit Fiber internet. Hopefully, you have a good ISP. I’ve had Gigabit Fiber from a great regional Telecom for seven years and LOVE IT!
Thanks. It’s going to be almost lifechanging. I moved out into the woods 20 years ago, when I was still using a dial up modem to a house with no cable. And for 20 years, the world has been speeding up with me trailing far behind. Until this year I’ve been on a DSL nominally 6 Mbps but it cuts to half of that at times. I added a 5g cellular connection which gets me 20 Mbps when it’s good, and nothing when it’s bad (like when the kids get out of school each day. So fiber speeds (symmetric!) will change all sorts of things, including how much streaming is actually pleasant to watch.
Are you using the providers router/wifi or your own? What are the makes of the old and new routers? can you get into the new router’s settings and change the wifi access to the same as your old router?