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I have a weird problem which started yesterday with signal strength on my triple lnb dish. A little background:

The dish is WNC; 2 coaxial feeds into an RCA and Samsung HD receiver. Installed and operating for several months. Because of mature trees causing interference this summer, it was necessary to move the dish about 70 feet. I added coax to the existing run and total distance is 175-200 feet with in-line amps in both legs. Dish operated well after move and signal strength was 75-90 on 101, 85-95 on 110 and 119. Worked fine for two days after move.

Now for the weird part. Turn on the set yesterday (about noon; temp around 90) and I have a badly garbled picture on 360. Cycle through channels and discover problem is on channels that use odd transponders. Check signal strength and find that 110 and 119 are fine; however, 101 has good signal strength on all even transponders and really poor signal strength on all odd transponders (from 15-30!). In the process of troubleshooting, I disconnected one of the incoming coax lines and the transponder strength on all odd transponders returned to normal on the coax which was still connected to a receiver. Hooked up the second coax and the odd transponders again dropped to 15-30! I then disconnected the second coax and left it disconnected for a few hours. The second set worked fine and the odd transponder signal levels were good. After several hours (around five in the afternoon) I again hooked up the second coax and BOTH receivers worked fine with good odd transponder signal strength. However, after about an hour of operation, the odd transponder signal strength dropped again. Went to bed that way. This morning (six AM) all is working well and signal strength on odd transponders is back to normal.

Now, I don't know a lot about the inner workings of the DTV triple LNB with integrated multiswitch, so here is where I am at present. I moved the dish two days ago; added about 75feet of cable and four coax connecters. However, dish worked fine for two days after move. Problem started yesterday and appears intermittently (also hottest days of year since installation). Dish working fine this morning. Leads me to believe problem is either in coax (intermittent) or LNB (intermittent).

What would cause only odd numbered transponders on 101 to lose signal strength intermittently with two of four switch outputs connected? I tried moving the coax connections on the LNB to other conections with no change in the symptoms. Could an intermittent connection in the shield cause a drop in signal strength on ONLY the odd transponders, or is this a heat related problem with the LNB and multi?

Thanks for your input.