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Old December 14th 08, 05:38 AM posted to rec.radio.amateur.antenna
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Default Phasing of stacked Yagis

"Jerry" wrote in
:

....
The two 100 ohm loads in parallel give a 50 ohm load to the 50 ohm
coax
main feed line. I used a ferrite "balun" where the unbalanced 50
ohm *main feed line* connects to the center conductors that are
connected to be a 50 ohm load. .


You didn't mention the balun in your fist posting. Without an effective
balun, the system would be quite poor.

In each pair of antenna side coax lines where the shields are tied together
and the inners are used for a 100 ohm connection point, you drive one coax
in opposite phase to the other. Your description did not note that there is
particular phasing requirement for the coax lines to the antennas, and
polarity of connection of the DEs.

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

Owen
 
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