You’ll still require a means of amplifying and broadcasting the converted signal if you need true OTA but this gets you an analog RF signal (NTSC in the US) from a DTV broadcast.
I wouldn’t be surprised if you could take the output of the DTA and feed it to signal booster/amplifier with an antenna on the output and get short range OTA broadcast. Just know your laws on allowed output power.
Do you happen to remember any of the brands/types?
They were referred to as DTA’s - https://en.wikipedia.org/wiki/Digital_television_adapter
You’ll still require a means of amplifying and broadcasting the converted signal if you need true OTA but this gets you an analog RF signal (NTSC in the US) from a DTV broadcast.
I wouldn’t be surprised if you could take the output of the DTA and feed it to signal booster/amplifier with an antenna on the output and get short range OTA broadcast. Just know your laws on allowed output power.