koda55 wrote:
I had the same problem with my jack antenna. I then read the instruction and the back of the antenna is what receives the signal. After turning the antenna so that back was towards the signal no more problem.
That makes no sense at all. Backwards is really forward... What?
The FRONT of the antenna is that which is the opposite side of the mast, and that's the focal point of the antenna, nowhere else.
OP- Some LED's can play havoc as stated above, or you are simply far enough from the transmitter site that you are on the threshold of the receiver, and when you say several hours at a time, that's my guess because the weather is affecting you.
Short of replacing the Jack with a better deep fringe antenna and adding something like a SensarPro that will permit precise pointing, and add enough gain to compensate for line and splitter losses, you're kind of at the mercy of the inversion moving around with no way to overcome it.