Logo of the Physikalisch-Technische Bundesanstalt
View of the Mainflingen long-wave radio station for transmission of the DCF77 signal: transmitter building (in the back), antenna building (yellow bricks) and antenna masts.

DCF77

Schematic of the Mainflingen transmitting station
Schematic view of the Mainflingen transmitting station; as inserts: the DCF77 control facilities (on the left), injection into the antenna on the roof of an antenna house, and the transistor transmitter,
source : EnBW

The emission of time signals and standard frequency via DCF77 represents by far the best known and (also geographically) most widely spread procedure to disseminate the legal time realized by PTB for Germany. The following pages describe the service in more detail. Essential information can be called via the following pages.