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Old December 14th 08, 01:32 AM posted to rec.radio.amateur.antenna
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Default Phasing of stacked Yagis

"Jerry" wrote in
:

....
Hi Owen

Richard Clark once told me how to combine 4 antennas in an array.
He got
me to feed 4 antennas, 50 ohms each with 50 ohm coax with no dividers.
I just fed each antenna with 50 ohm coax. At the point where the 4
coaxes get combined, I connected two coaxes in series and the other


Can you explain in more detail what you mean by "I connected two coaxes in
series"?

two also in series. Then parallel them to get back to 50 ohms. The
result is two 50 ohm loads in series to make 100 ohms and with the
other 100 ohms in parallel, the combination is a good 50 ohm load.
You can see a sketch in the Feb 2008 QST. It works pretty slick when
the antennas are 50 or 70 ohms where it is easy to get the right coax
impedance.


Owen
 
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