I recently installed a garage door opener in an arch style metal building. The building is an excellent RF shield when closed. I am able to operate the control for a few hundred feet with the door open and only a few feet with the door closed.
The remote control operates at 515MHZ. I am considering using a coax cable and folding back 9.4" of the shield on both ends exposing 9.4" of the insulated conductor. I will then place one end near opener and the other on the outside of building.
Will this work? Is there a better way? I hope to get 50' with door closed. Just trying to make a good plan before I climb around using the 16' step ladder with my old tired body.