Owen Duffy wrote:
There is nothing in what you have said that suggests to me that VSWR
is the cause of TVI (or feedline radiation in the more general case).

Please reference "Baluns: What They Do and How They Do It" by W7EL.
VSWR causes impedance transformation. Impedance transformation
varies the impedance. Baluns work better with some impedances than
they do with others. Therefore, VSWR can cause balun malfunction
accompanied by feedline radiation. All it takes is one time. And a
possible cause is not necessarily a probable cause.

There is nothing to suggest that you will be injured every time you
ride your motorcycle at 120 mph. All it takes is one time.
--
73, Cecil http://www.qsl.net/w5dxp