Is it possible to hook up a PS HDTV antenna and a Amazon fire stick to the same TV that is not new but has a HDMI port?

Yes, it is possible to connect both a PS HDTV antenna and an Amazon Fire Stick to a TV that has an HDMI port. You can connect the Fire Stick directly to one of the HDMI ports on the TV. For the HDTV antenna, you typically connect it to the TV's coaxial input, which is separate from the HDMI ports, allowing you to use both devices simultaneously. Just make sure to switch the input source on the TV to access either the Fire Stick or the antenna as needed.