Geneva Frequency Plan of 1975


The Geneva Frequency Plan of 1975 is the internationally agreed frequency plan which was drawn up to implement the provisions of the Final Acts of the Regional Administrative LF/MF Broadcasting Conference held in Geneva, Switzerland, in 1975. It covers radio broadcasting in the long and medium wave bands outside the Americas.
The plan was drawn up under the auspices of the World Administrative Radio Conference of the International Telecommunication Union with the assistance of the European Broadcasting Union.
The Geneva plan replaced the 1948 Copenhagen plan. It became necessary because of the large number of broadcasting stations in these frequency ranges leading to ever more mutual interference. The Geneva plan entered into force on 23 November 1978 and although its intended lifespan was only until 1989, it is still valid today, and compliance has been far more widespread.
Most existing European radio stations were required to change their broadcasting frequencies following implementation of the plan. In most cases the changes were slight but were more drastic in some cases, particularly in the United Kingdom, where all BBC national stations moved to a new wavelength or band. However the increased number of radio services and reduction of interference to radio signals was considered by most broadcasters to be worth the initial inconvenience.
As a result of the plan most medium wave stations outside North and South America operate on exact multiples of 9 kHz; the sum of all digits of the frequency will be 9 or a multiple of 9.

Predecessors to the GE75 Plan