That would have worked well enough for a city or suburban area.
It wouldn't have worked on my folks' house in Bloomington IN in that era. We were 50 miles each from Indy and Terre Haute, with a lot of woody, hilly terrain in between, as well as being at the bottom of a hill. We had a large Channel Master VHF-only antenna about 15 feet above the roof line (our only UHF was WTIU/30, the local PBS outlet that came in well with an indoor loop) with a rotator and preamp. It still could only produce a snowy picture on our ABC affiliate, WLWI/13, although the other channels came in well.