You should be able to connect the tv to a converter box. This is good for OTA signals to a TV with an NTSC tuner (coax) or composite video input. http://www.cobyusa.com/?p=prod&prod_num_id=205&pcat_id=2007#features-tab
has the manual for the DTV102. Put the antenna coax cable to the converter box ANT In and then either the antenna out to the TV or the A/V (composite) out to the TV's composite in. If you use the RF connection, you will need to set the TV to channel 3 or 4 and set the switch on the converter box appropriately. For a composite video connection, you will need to change the input to AV1 (if there are several inputs). Depending on the TV, there may be a source or input button on the TV. For other models this is only on the remote. If you have the original remote, no problem. If you have a universal remote, make sure that you have a key that corresponds to the feature and that you found the code that lets the key work for your TV. (Not all universal remotes have the feature.)
However, you should get the best antenna that you can and have it pointed correctly to receive the stations. Digital signal doesn't have borderline reception. Try antennaweb.org or tvfool.com to check the stations and directions in your area. Antennaweb assumes an outdoor antenna but is very conservative in the channel list that it will indicate you can receive. Tvfool lists the channel reception depending on the antenna type. Tall trees and buildings can block the signal.
I hope this helps.
(please note that surges from the antenna can damage converter boxes and kill the tuner.)