27 MHz R/C Band

Both AM and FM share the same frequency band. Most modern radio sets are AM but some older sets were available as FM. The frequency band approved in U.K. is 26.960 to 27.280MHz.

The recognized frequency indicator for this band is the appropriate coloured pennant(s) (flag(s)) or a white flag with channel number in black attached to the transmitter arial. A white flag is recommended for sets using 10kHz spacing. Generally at least 20 kHz spacing between transmitter frequencies is advised as only the very latest equipment is capable of operating safely at this specification.

Split frequencies are no longer exclusive to model radio control and may be subject to interference from other authorized users.

Ch No

Pennant Colour

MHz

Ch No

Pennant Colour

MHz

2

Black

or

Grey

/

Brown

26.975

17

Orange

/

Yellow

 

 

27.125

4

Brown

 

 

 

 

26.995

19

Yellow

 

 

 

 

27.145

7

Brown

/

Red

 

 

27.025

22

Yellow

/

Green

 

 

27.175

9

Red

 

 

 

 

27.045

24

Green

 

 

 

 

27.195

12

Red

/

Orange

 

 

27.075

27

Green

/

Blue

 

 

27.225

14

Orange

 

 

 

 

27.095

29

Blue

 

 

 

 

27.245

30

Blue

 

 

 

 

27.255

32

White

or

Purple

 

 

27.275

Blue on 27.255 was the original 'spot' frequency allocated for radio control in the USA.

The band was originally split into the six Colour frequencies 50kHz apart.

As the selectivity of receivers improved, 'split' frequencies were introduced 25kHz from the Colour frequencies subsequently changed to 30/20kHz splits in anticipation of the continued improvement in selectivity to a channel spacing of 10kHz.

The UK Radio Control Council provide comprehensive details of all 27 mHz R/C frequency allocations for model use in the UK.