My dish measures 32" across, I don't know if that would be 76cm or what it would be called. I bought it new and it will not hold a lock on any of the NBC's on the Ku side of AMC-1 regardless of which lnbf I try using. I tried the new PLL from Titanium skewed -26 offset. The Beach Camera's from California are rock solid. The NBC peak at full signal and bounce to zero. No signal in between zero and full signal strength. They won't lock and stay locked. Has anyone got a lock on these channels with a 76cm or would I need a bigger dish to get these? Thanks.