Get an antenna.
The conversion to HDTV years ago made an antenna valuable once again. Depending on your distance from the transmitting towers a simple bow tie antenna might be enough.
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I am a long way from the transmitting towers and have a Channel Master 4228 in my attic which is an array of 8 bow tie antenna.
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I have no problems getting all the local channels. It has been awhile since I use it on a regular basis but it is still connected and gets some use when our internet is down and we can't watch anything since we are 100% streaming.