Antenna tuning hut
An antenna tuning hut or helix house is a small shed at the base of a longwave or mediumwave radio transmitting antenna.
The radio frequency current from the transmitter is supplied to the antenna through a cable called the feedline.
The powerful radio waves near the antenna can be a hazard for workers, so the interior of the antenna tuning hut is typically shielded with copper or aluminum sheeting or wire mesh, in order to reduce radiation from the tower.
In operation the components can have a voltage of several hundred thousand volts.
The building may also contain lightning protection devices and power transformers for aircraft warning lights on the tower.
Antenna tuning hut of the backup tower for
Blosenbergturm
in
Beromünster
.
Inside the coupling hut of a 250 kW AM station with 6 antenna towers.
Antenna tuning hut in
Beromünster
shown in its location directly under the backup tower.