Securely fasten the grounding wire to the side of your house using staples or other zip screw type wire clamp suitable for the job.
Grounding an antenna in attic.
If you need to bend the ground wire make the bends as gradual and as smooth as possible.
There are very specific requirements for grounding an antenna both via mast ground and a shield ground.
There is no requirement to ground an attic antenna in the national electrical code.
So there isn t any ground from the tv either to bleed off any voltage that might pass through the antenna.
Neither apply to an antenna in the attic.
Run a length of 6 jacketed stranded ground wire from whichever you installed there directly to your bussbar.
Stick to the building code.
It doesn t support what you want to do.
Exterior antennas must have their mounting rod grounded to provide electric discharge in the event of a lightning strike or static accumulation from other causes.
From your description it sounds as if you may create a ground loop which may cause problems throughout the house.
But first check the electrical plugs of the various devices attached to the tv line.
The mounting rod is insulated from any of the active reception parts.
You should therefore strongly consider grounding your attic mounted antenna by attaching a grounding block to the coaxial cable to shunt off excessive leaked current.