I have constructed a simple telescopic dipole for 2M to 6M to use with my
FT-817ND. This works fairly well but it is prone to RF on the feeder and
some noise pickup. This is almost certainly the result of feeding a
balanced antenna with unbalanced coax. As I need a wideband balun I can't
use traditional VHF tuned baluns. Question is which type of balun can I
scale up (down?) to VHF from HF and maintain efficiency? Toroidal balun?
Ferrite choke? Coiled coax? If ferrites or iron dust cores are involved
then what mix?
Any ideas?
Dick G4BBH