"Cecil Moore" wrote
Reg Edwards wrote:
A choke balun, a single short length of transmission line wound on a
ring or
rod, is a different kettle of fish. Its range of impedances is
unlimited.

The more I think about it, the more it seems likely that a common-mode
wave travels down the outside of the braid until it encounters the
choke impedance and is reflected, at least partially. That would
create common-mode standing waves. When the weather clears up, I
think I will see if the common-mode current goes through a maximum
and minimum up and down the coax.
--
==================================

Cec, its obvious even to a citizens bander that when the common-mode current
and volts encounters the choke, or anything else, it is reflected. There's
no need to risk your neck to detect it.

You won't prove anything anyway. Your particular antenna might not suffer
from noticeable common-mode effects. And you can't deliberately inject a
test signal at any place because it would upset circuit conditions.

Furthermore, the choke does NOT do what the old-wives say it does, ie., stop
radiation from the line and prevent noise pick-up. It might even make
matters worse. The choke merely shifts the volts and amps standing waves to
other places along the line.

Have I upset the apple cart again?
----
Reg.