AMC 1 W1 Question

[sonyajon]

Have a Sub with SRL for the Denver Networks CH 500 through 507 with the 4DTV 922. In the evening and early mornings, can receive with minimal quality. When the Sun comes up, the channels go away. But can watch channel 751 with decent quality all day long. and can see feeds during the day as well.

Is there something goofy with the skew on Ch 500-507 or Weak Transponder

I am using a DMX741 for LNB

Any suggestions? Have W5 with excellent quality and W4 and G4 with excellent quallity as well.

Any help would be greatly appreciated