Antenna height is irrelevant if there is "nothing there" or if the mountains are high enough. I'm shrouded by a hill between me and the "Tower Mountain" in Spokane where most the station transmitters are located. Back "in analogue" there were a couple of stations that were watchable, but little flecks of snow. After the change to digital, there were several there, that I could not receive. There's a "translator hill" here in town that re-transmits several, but in the switchover, there was a period that there were some channels without translators.
I bought a HUGE yagi/ corner reflector brand name antenna. The boom was 14 ft long. I hung it off the tower with a rotator on a side arm so I could tweek it over 10 degrees for aiming. (Could not reach the antenna to move it, otherwise) Turns out there were several of the "old" stations up on Tower Mt that could no longer be received---digital had not enough power or antenna at the sending end
There's a website that analyzes your location, and available stations and strength
start there:
https://www.tvfool.com/
Also do not get taken in by exotic spaceship-looking "HD" antennas. There is no such thing. Antennas work the same way now as they did in 1980, or 1960, or 1940, or 1920. There has been better designs over the years, but some of the weird "spaceship" crap for HD is not "some" of them.
My antenna farm before I took most of it down. The TV beam is diagonal at bottom left, 14' boom. Home built side arm. For scale, the one big yagi is a 26 ft boom, and the 6 meter yagi on top was a 6? element with 34 foot boom. THIRTY FOUR FEET
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The smaller UHF corner reflector pointing off to the right was put back up, permanently pointing at the local translator hill. It's maybe 4-5ft? or so I think 16 elements
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The big 14' antenna after it is down. Don't get me wrong this is a long range, high performance antenna. But there are hills in the path, and digital simply does not have the "soup" that analog had, plus analog, "you could stand" to watch it a little noisy, where digital simply stops working!!!
I bought this new for 200 and change and I might as well have burned the money.
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