27MHz Band - For general use

Frequency band approved in U.K. - 26.960 to 27.280MHz.

Frequency flag - attach to transmitter antenna either colours as listed or a white flag with channel number in black.
If new equipment is used capable of operating on a 10kHz channel spacing it is recommended that the white flag be used to advise other modellers. A minimum spacing of 20kHz should be maintained with older equipment. Check with other operators before use.

The 27 MHz Band was one of the first two radio control band approved in the U.K. It is shared with several other users, including C.B. Radio. Because of possible interference from other users, it is not recommended for aircraft or other models where interruption of control of the model is likely to be a safety hazard.

The band was originally split into the six Colour frequencies 50kHz apart, although blue was often on 27.255 - the original 'spot' frequency allocated for radio control in the USA. As the selectivity of receivers improved, 'split' frequencies were introduced 25kHz from the Colour frequencies. Later the split frequency was changed to 30/20kHz from the Colour frequencies in anticipation of the continued improvement in selectivity to a channel spacing of 10kHz. Radios capable of operating on a 10kHz spacing are now on the market but operators will have to take into account the wide variety of equipment in use on this band, many will not be able to operate closer than 20kHz apart. Check with other users.

Based on the latest information we have, additional crystals on this band are not generally available from suppliers for the intermediate (10kHz) frequencies. It is expected this will be overcome by introducing new equipment with synthesized frequency selection rather than swapping crystals as we normally do now.