Antenna

Antennas are structures that are comprised of decoration blocks and have one loot chest.

Where to find
They generate in the plains, forest, desert, swampland, and extreme hills biomes.

Loot
The loot chest they have contains common items, such as steel, titanium, or Nuka Cola.

The blocks themselves also can be harvested.

Refurbishing
Tape recorders and satellite dishes have no function outside of aesthetic, they just make your world look cooler. Besides, the structure is practically undamaged, so there is nothing to refurbish in the first place.