Some one used to make a "choke Balun. I belive it was just a series of ferrite beads over coax inside PVC pipe, but they seemed to work well. As I recall they covered 1.8 through the 50 MHz bands. Any one know who made them and if they are still available, or if not how many beads of what mix over what size coax? TIA es 73 Roger (K8RI)