if you do a T match like telrex used on their monobanders there is no
favored side, the two T arms were fed with a 1/2 wave phasing line and
required no capacitor so everything was at dc ground. very simple to build
and definately balanced.

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

The T-Match will still show a favor in signal launch because of the
imbalance of the gamma rods on one side, on a beam this could even be
manipulated to ones favor--not as likely on a monopole... just looking
for a way to completely balance the field pattern...
I just thought someone had most likely done something like this
before... if I don't hear of anyone, will shove some various sized
drain, stove pipe, soldered cans, etc. over a 1/2 monopole in place of
the gamma rod and check it out this weekend...

Warmest regards,
John

"Dave" wrote in message
...
why not a T match. simpler to build and adjust than a gamma,
completely dc
grounded, and balanced.

"John Smith" wrote in message
...
From working with the gamma match in real life--I have noticed it
favors
launching the signal from the side of the DE which has the gamma.

Now in playing with the gamma formulas, I wondered...
What if the gamma rod is replaced with a "gamma tube", same set up as
the normal gamma, except the the rod is now a tube surrounding the
element which is being fed? Something of a "concentric match", I am
guessing the formula to compute concentric line Zo would come into
play
here, or a near equiv... purpose would be to get rid of the favored
increase in signal from the side containing the gamma...

I know someone is going to suggest EZNEC--however, I am not good at
drawing a tube with it!!!!

Warmest regards,
John
--
Watching the cutting edge of yesterday replay--in virtual reality,
right
before my eyes--in real time!
Thirty year old technology--wasn't it amazing?