Modulators are great ways to enjoy your sets. The reasonably priced ones are Blonder-tongue BAVM Z series
https://www.ebay.com/itm/30354393616...Cclp%3A2047675, but need to be on a channel that both your TV receives and one not being used in your area.
The ones in that link you may consider are the channel 3 or 9, NOT channels 28 and 36, which are not UHF but cable super band. Connect a DT box, DVD, VCR to composite A-V inputs. On the output, a single wire is enough antenna to broadcast all over the house with any TV needing only a set of rabbit ears.
I have a superband BAVM that was a cable channel but ALSO corresponds to UHF-45, which is perfect for my sets with UHF. I also b-cast 3-7-11 which are not active in this area, from my outbuilding that has the video sources, rack mounted modulators and antennas for each channel up in a loft. The reception in the house is good but requires adjusting the antenna to reduce snow just like analog days. Way more than if I was using a TV in that same outbuilding.