"christofire" wrote in message
...

"Richard Clark" wrote in message
...
On Sun, 14 Dec 2008 21:54:45 GMT, "Dave" wrote:

BTW, you have constructed a type of power divider. There are a lot of
different ways to do it.

Owen

the simpler way is to just parallel all 4 of the 50 ohm loads which gives
you a 12 ohm load at the common point, then parallel 2 pieces of 50 ohm
coax
1/4 wave long to form a 25 ohm matching section, that will get you back
to a
50 ohm common point with no need for a balun.

Unfortunately, this would be a common mode nightmare.

73's
Richard Clark, KB7QHC


... why? It's a way it's done for broadcasting antennas. There's little
reason why the screen of the feeder can run continuously into the screens
of the transformer sections and on into the screens of the cables that
feed the individual Yagis. If the drive-points of the Yagis are equipped
with adequate baluns then there should be no more common-mode current on
the outside of the continuous screen than for the case of a single Yagi.

Chris

Of course I meant to type 'why the screen of the feeder can't run
continuously into ...'