Update: I bit the bullet, bought an antenna, ran the coax, and ...
I now get 30 stations from the one transmitter in my area. Wow - had no idea that was possible, as my two previous tries all resulted in zero stations found. Antenna is a GE/JJasco 33685, mounted inside, at the southwest window of the second floor.
For me, the local stations (for news and weather), and PBS stations are what I need.
Now the tough part: my $140/mo Spectrum cable bill (tv, internet, phone) no longer needs tv. But the removal of tv only saves me $40/month, and raises the 'net and phone service by $10 each. Bottom line savings is only $20. Wonder if there's a cheaper ISP, so I can get basic 'net and use a 'net phone.
hmmm