pianorak: when I left Farnborough it was the other way round, we could hear aircraft but they couldn't hear us. This was due to the location and power output of the transmitter. There are two Tx/Rx stations for 132.8, one of these being at Luton. Unfortunately it was found that this interfered with Luton's own frequencies so the power level was limited. I think this problem has been fixed now, but having said that, it must have been a big technical problem for both stations to be off the air, especially as the other one is not far from Stapleford.