Howdy - Newbie here....spent many hours over the past few days looking through this thread. Just wanted to get some feedback on a little problem that has developed. I live in the LA area, and installed a 43XG antenna on my house about 2 years ago along with the CM 7777 preamp and about 60-feet of RG-6. All of the LA stations are on one mountain about 31 miles away, all in the same direction. Things were great. All the major networks were strong, and we had a bunch of PBS stations also....maybe 20 stations total. Then, over time I believe, although I'm not sure because for awhile I thought seasons/sunspot cycles/etc. were impacting signal, reception got worse. Much worse. All of the PBS stations are gone, and the networks that were once solid (75 signal strength) now are low 60's (threshold for a picture) and often times in and out or no signal. Now I have no solid signals, and only 5 or so that are quasi-dependable, but still with drop-outs.
A bit of a novice, I didn't seal any of the coax, so I thought 2 years of corrosion was the cause. So I got new RG-6 with Snap N Seal connectors from Blue Jeans Cable. In the process of removing the old cable, I broke the built-in balun on the antenna as the connectors were corroded together. So I picked up a $2 one at Frys to replace it, installed the cable, and put Coax Seal all over the connections, including the antenna. No difference.
Then I removed both the preamp and the preamp power supply, so the coax went from the antenna to the grounding block to the receiver. The reception was just as good without the preamp as with it. There is 20 volts coming out of the power supply, so that either seems to mean that the preamp is shot, the antenna is too corroded (I am 1/2 mile from the ocean), or transmitter specs have changed.
I called Channel Master, and he said the preamp should be fine since there is signal with the preamp installed and powered, and there is zero signal (on any channel) when I unplug the power supply. Is there insufficient signal loss on a 60-ft run of RG-6 with multiple connections such that the 7777 wouldn't make a difference?
The beam is aluminum and in good shape with some light oxidation, but the "reflector", which is not aluminum, seems to have surface rust.
My TVfool chart is attached.
Any thoughts on what may be the problem? I could put in RG-11, although that would make a difference, get a 91XG, or the Research Communications preamp, but I didn't have any of that 2 years ago and things were great.
I'm using a Digital Stream HD3150plus receiver.