A note below from Graham Duke for all airband listeners re: 8.33KHz frequencies:
'The recent introduction of the new 8.33kHz channels in UK airspace may have resulted in unexpected consequencies for some airband listeners.
For example, it may have been possible to hear the controller on the original 25kHz frequency, but nothing is being heard on its replacement 8.33 channel.
This is because the two systems operate in different ways.
Under the original 25kHz system, the signals were usually transmitted from two or three different sites.
However, this is not possible under the 8.33kHz, and only one transmitter can be used.
This means that the transmitter near you may no longer be in use for the new 8.33kHz channel, therefore the controller can no longer be heard.
It does not mean that there is a fault with your receiver. PROVIDED YOU ARE WITHIN RANGE of the transmitter, the controller will be heard.
Your radio needs EITHER 8.33kHz steps OR 5Khz steps to do this.'
Thanks for clearing that up Graham, there seems to be some confusion over these channels among pilots as well as listening enthusiasts!
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