I have two receivers, an H21-100 and an H20-100 running through a WB68 (w/old slimline dish). The past couple of weeks the H20 has been getting constant 771's on channels like FXHD, FXX and FSWD. Restarts fix it for a short time before it goes all 771 again. Turns outs they are all on the same transponder, 23 of D12@103w. When I run a signal test the H20 is showing 0 0 on 23 & 24 of 103 (ca), the H21 on the other hand is well into the 70's on the same TP's. (70's signal due to LOS going directly through lovely, large redwood in the neighbor's yard ) So it's likely not the dish since one receiver is fine. Could it be the B-Band converter on the H20? Or is it time I put the H20 out to pasture? (The H20 is a bit buried in an equipment stack in a cabinet, which is why I haven't simply swapped b-b converters yet.) thx in advance. Edit: now that I look at the wiki on B-Band converters, I'm not sure they have anything to do with D12.