Hopefully someone here can help me. I have been reading that there is an OTA receiver for DirecTv called the AM21. I currently have my Samsung HD tuner hooked up to my TV so that I can get RetroTV channel 27.2 to watch Doctor Who when they start broadcasting it next month. I'd like to get the AM21 tuner so that I can record through my DirecTv DVR. I have read that the only channels that AM21 will pick-up are channels that are in the D* database. So my question is, does anyone have any experience with the AM21 tuner? Do you know if I will be able to pick-up RetroTV?