Frequencies dedicated for radio microphones, known as Shared, are available across the UK. A licence, which must be purchased from PMSE Licensing, is required to operate radio microphones on these frequencies.
There are VHF Shared frequencies and also UHF (Channel 38) Shared frequencies. The UK Wireless Microphone Licence does not specify spot frequencies in Channel 38 - but the 10 channel plan below will ensure that all frequencies can operate in the same location without harmful interaction. This plan is a suggestion only. Users and manufacturers can devise their own plans that could involve any number of frequencies within the range.
||UHF (Channel 38) (MHz)
*Not available in Northern Ireland
RF bandwidth is limited to 200kHz. Transmitter power is limited to 10mW (Up to 50mW permitted for body-worn pack).
A licence to use all the VHF shared frequencies is £80 (£75 on-line) for one year. A licence to use all the UHF shared frequencies is £80 (£75 on-line) for one year - and £155 (£135 on-line) for two years. Two licences are required to use both the VHF and UHF frequencies. Care must be taken when using multiple frequencies from these sets. Interference problems may result from interaction between the multiple frequencies known as inter-modulation.
Licences on these frequencies are available to all users, and Shared frequencies can be liable to interference from other licensed shared radio microphones. However, they are most suitable for users who require ‘go anywhere’ radio mics, to locations where they are not likely to come across other users.
At busier locations, and to avoid the possibility of interference from other users of shared radio mics, users are advised to use Co-ordinated frequencies.