The signal is occasionally taken off-air to allow maintenance work on the masts and antennas at Anthorn Radio Station to be carried out in safety. A radio-controlled clock will not be able to pick up the MSF signal during these periods, so may drift off from the correct time.
MSF reception difficulties
The main causes of reception problems are local interference from electrical equipment and a reduced local signal due to screening by nearby metalwork, for example in a steel-framed building. If your radio-controlled clock is having difficulty receiving the MSF signal, please first read through the information in the 'Common clock problems' document.
Common MSF signal reception problems