WWVB, the radio station which broadcasts 60 kHz time and frequency signals, is located in Fort Collins, Colorado, about 100 kilometers north of Denver. It is the companion to the shortwave station WWV.
60 kHz antenna
The longwave WWVB antenna is so large it is actually a cable strung between several different towers. Here are some general views of the antenna.
The antenna for WWVB undergoes regular maintenance, as well as periodic upgrades. These photos were taken during a major upgrade which took place from 1997 to 2000.
Some detailed views of the antenna, and its servicing.
The 60 kHz transmitter amplifies the time signal before it is sent to the antenna. A 50 Ohm transmission line connects the 60 kHz transmitter in the broadcast house with the antenna. The transmission line begins on huge spools, and is buried in a shallow trench.
With the 60 kHz antenna, the transmission line must be matched to the antenna through a coil called a variometer.
Construction of the new 60 kHz transmitters.
The following are the old 60 kHz transmitters and antenna matching transformer