HR24-100 - 0x5D2 HR21-100 - 0x5D2 HR21-700 - 0x5D2 Both SD versions of the channels were in my Custom 1 list on my My HR24-100, HR21-100 and my HR21-700. After the introduction of the HD versions, the SD versions of the channels were removed and the HD versions were NOT added. This has been the standard operating procedure on my DVR's for quite a long time. IIRC, it happened when AMC went HD as well. I also hide SD duplicates on all recivers, so maybe that has something to do with it.