How To Ground Attic Antenna
From your description it sounds as if you may create a ground loop which may cause problems throughout the house.
How to ground attic antenna. Install a polyphaser or at the very least a ground cable with ring connector inline between your antenna pigtail and the coax run. In the case of an attic installation your tv antenna will be sheltered from the environment so there s no need to ground it for that reason. So there isn t any ground from the tv either to bleed off any voltage that might pass through the antenna. I have read many mixed opinions on grounding in the attic so i have decided to ground just to be safe side.
If you find the attic install unsatisfactory and you move the antenna outside then you definitely do need it. Run a length of 6 jacketed stranded ground wire from whichever you installed there directly to your bussbar. Try to keep your ground wire runs as short as possible and avoid making 90 degree turns or bends. If you need to bend the ground wire make the bends as gradual and as smooth as possible.
Securely fasten the grounding wire to the side of your house using staples or other zip screw type wire clamp suitable for the job. My house ground rod is not to far from where the antenna will go but the copper will have to go out and down one side. There is no requirement to ground an indoor or attic antenna. Stick to the building code.
There are very specific requirements for grounding an antenna both via mast ground and a shield ground. However the connection of your antenna coax to various ac operated equipment in this case your converter box or tv introduces the potential of electric shock. Neither apply to an antenna in the attic. I want to cut the cord and put a antenna in my attic.