no, an old Voom box is useless.
It will not work for OTA only, unless it was disconnected from the sat feed before it got the kill signal, which can't be proven if you buy it online.
Get a DirecTV HD receiver. They do NOT need a card to work, (except for H10) and do NOT need a satellite subscription to work.
Get a Hughes HTL-HD, Sony HD200 or Zenith 520. All are great OTA HD receivers and can be found on ebay for as little as $100 used.