Directv Phase III HD dish conversion
I remember seeing a thread a while back about someone that converter a mini multi Phase III Direct dish to a HD dish by changing out the LNB and modifying the arm eg length and height for the LNB. ...
Forum Discussion
While it can be done as daamac said it will be difficult to aim and the signal will be weaker. When DirecTV switched to HD they were forced to go to a larger reflector due to the higher frequencies having greater attenuation by dust, moisture, and etc. in the atmosphere. You do have one advantage with your location. The look angle in Florida is high. The further north you go the lower the look angle becomes and the more of the lower atmosphere, where most of the attenuation takes place, the signal has to pass through.
