One solution for evading capture is to use some sort of wireless link. In Manchester one of the tricks when the studio is in a cluster of high rise flats is to find an empty flat in another building and put your transmitter in there. You can then use a low power radio link, lR/Laser or SHF link from the studio to the main transmitter site. Once the DTI raid the flats, you power off the link and allow the DTI to make off with the transmitter. They would be so busy finding the origin of the main frequency they wouldn't have time to track down the origin of the link as you would have powered it down. I'd only try it a couple of times though before they put someone on the case of tracking you down full time.