I can understand that folks with larger dishes are still getting them ok. What's confusing is that those channels have always been 75 SQ (day & night) here until recently when in the evenings they drop completely out. Around 2 am they start coming back up. Just seems a little strange.
I had my Primestar 90cm pointed at AMC-4 last winter before I dedicated it to 83w for RTV. I got between 60-75Q on the tight Pansat meter then always.
I only had my 84cm pointed at AMC-4 for about a month now since 123 went to the dogs totally so I can't comment on it more than a few weeks ago.
It is very strange this is happening only to this transponder. Like clockwork it's starting to drop again for the night down to 45 from 60+ this morning. By 6 or 7pm it will be 30, by 9pm it will be breaking up and may hit a low of almost 10Q. By 2 Am it's back to 30 here.
I may mess with my dish later this evening and try a few things such as messing with the skew. I just re-peaked the thing to the max this morning because I put my new custom dual LNBF bracket on. The thing is then it was high as it gets. I actually used BVN to adjust the skew since it was the weakest transponder this morning and was more critical than HTN.
I wonder it the bird is drifting in the evening out of the box since it's old. It's possible but I would think it would show up on all transponders if thats the case. Another thing may be that there uplink dish may be off the bird and causing this due to the bird drifting. If there using a good size uplink dish the beamwidth being so narrow would cause this if not on the money.