Wirelessly Connect Yamaha receiver to Tivoli Model One radio, 40 feet away


Nov 30, 2014
In the back room of my son's apartment he has a phonograph connected to a Yamaha Reciever RX-396. In the front room, 40 feet away he has a Tivoli Model One radio. He wants to listen to LP's in the front room--wirelessly.
My impression is that bluetooth is not viable because of the distance.
How can i help him?
The Tivoli radio has an aux-input.
The Yamaha has a headphone jack on the front, and screw-type, L and R speaker wire inputs on the back.
The solution would be my holiday gift to him. Thoughts?