Thanks for the understanding. To clarify, and I guess why I the length of cable and what not was so vague is because I'm just used to being able to "tinker" with my setup and honestly wasnt thinking of length or what have you, the run for the indoor is roughly 25-30ft. I'll give more detail to help you. It's an "Amazon Special" flat indoor with that very "thin" wire..meaning I can move the wire on the floor to the Mohu amp I have connected, that's about a total of 10 ft, then to a coupler, which then runs the other I'd say 10-15ft into A/B switch, then to tv. It's a flat antenna. Outdoor has the preamp from about a 5 ft wire, to the input, then i to house via backdoor straight to the power injector, then to A/B switch, then to tv. Actually that antenna is the 4 bay UHF and gets hi-VHF actual channels 9 and 13 (shows up channel 3 on tv.) 12 doesn't come in on that. But what I was really trying to figure out was the interference happens the same time just on the hi-VHF channels at the same time when it occurs. Most times at night. Today it has occured around 5pm. Not really happening on the UHF channels. I've tried plugging both coax lines directly into tv and taken A/B switch out of equation. Also tried without any amps or preamps. All signals are too weak at that point. I get horrible pixelation without the amps. On my smart tv, if the signal drops below 74, it starts that. Usually even when interference is occuring, for the most part I'm getting about 94%. Unfortunately, no bar to show spikes with lowest number and highest, just expressed in current %. When the wind blows hard, it does make a difference. I trimmed and cut a lot of limbs that were in LOS of outdoor antenna and it made a big difference. Still having some issues again with this. The small Mohu amp ks plugged into a power strip, tried another outlet, bad pixelation on indoor antenna. Nothing else in power strip. Wineguard power injector plugged into outlet. Have eliminated any source like microwave, coffee pot, lights, can opener, kinda baffled. Maybe winds, as I have a metal roof and even on outdoor antenna since it's only 10ft up? Thanks for the understanding and I hope this helps.