Thank Lee, Peter & Paul.
All working fine now. Having set my SD traffic separation to 40,000ft, I'm happily watching commercial stuff passing overhead Devon at 37K.
I've noticed that the bottom of PAW box is quite warm to the touch. Is that normal? Do you advise on any cooling measures such as mounting it on a heat sink, metal plate etc? Should the power and antenna cable be tied in a coil or kept loose? Just asking.
Mike