.... yes, I am known to reply to my own posts--far too often...

From all the current baluns I have tried, and I have tried every type I
could find, this choke/balun design is my favorite and seems to have the
lowest insertion loss of all and seems to exhibit excellent qualities of
the type desired:
http://home.datacomm.ch/hb9abx/pactor-e-choke.htm

John

"John Smith" wrote in message
...
... I should have pointed out, always, the balun has been inserted at
the antenna, and never at the transmitter end of the coax in my
previous post...

John

"John Smith" wrote in message
...
Reg:

I can comment on my recent experiments with a half-wave vertical on
10-11 meters.

A current balun (or ferrite beads on the coax) greatly reduce
feedline radiation--seems to have an overall beneficial effects on
the antennas radiation pattern--and seems to "stabilize" the
pruning/tuning of the antenna (things begin behaving in a linear and
logical way.)

Mind you, the above is only deduced/measured with a FSM, SWR bridge
(of the type which does NOT work for real measurement of swr but
rather transmitter loading) and observed/known signals from other
stations and the reports given back on my signal from these stations.

While this may be viewed as "crude" by some--it is real world in that
the effects as least "seem" real.

Or, the short form of all this is, "The Current Balun is my friend!"

John

"Reg Edwards" wrote in message
...
A choke balun is what is inserted between the transmitter end of the
antenna feedline and the transmitte tuner. Or it can be inserted at
the antenna end of the line.

Questions : How effective is it? To what extent can the percentage
unbalance current on the feedline be expected to be reduced? Has
anybody ever measured it before and after insertion?
----
Reg.