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(perspective of the map makes it look like it's through the neighbor's house, but it's not),
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You have to uncheck 45 degrees under Satellite to get 90 degree view; see attachment.
I agree with ADTech, a preamp would most likely be overloaded.
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So it looks like antenna improvements, like outdoor location, are the order of the day.
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You could try a different antenna location and aim in the attic to favor ION before going outside. Maybe moving it a little further north.
You could also try a little attenuation in the coax to eliminate possible tuner overload even without a preamp which would affect ION first because it is the weakest desired signal.
There is also the possibility of interference from strong local FM signals. Try a HLSJ (high and common ports) in the coax.
http://www.fmfool.com/modeling/tmp/8...4/Radar-FM.png
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No other connections (not even a ground block, which I should correct).
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The NEC doesn't require that the coax be grounded with a grounding block that is connected to the house electrical system ground for an attic antenna, but it is a good idea for your personal electrical safety and to reduce the chance of interference.