H-20 WILL show ALOT less. (no Doubt). R-15 ALSO shows about 4 to 5 pioints less ALSO. Same dish same MSW. Same cable run.
Personally here in the southesast. It doesnt matttter if is a P3 18/20 OR the At-9 , If ya get 84% on trans 1 on the 101 with the h-20. YOU ARE MAX-ed!.
How do you explain the 94 on TP 1 and the other 90s and 100s shown on the H20 snapshot posted above in this same thread? That isn't trick photography and I'm not in here schilling for D*. In that photo the H20 is connected to a Winegard DS3101 (1-meter dish) through an A/B switch, proving that if the signal is there
the H20 will proudly display it.
Agreed, the AT9 does NOT
belong on your roof unless the installer hits a main attic stud (rafter) with the main foot as well as with both of the strut rods. Three-point contact, all three into studs/rafters, not roof decking material. No exception, period. Please note the period. That dish weighs 32 pounds and has 5-1/4 square feet of wind load surface area. It has absolutely got to be anchored solidly.