[amsat-bb] 2x6 elements DK7ZB and polarization switch finished

Henk, PA3GUO hamoen at iae.nl
Mon Apr 14 10:30:52 PDT 2008

Hello !

Just want to share with you some results of the past months:

In November I built an DK7ZB 2x6 elements beam for 145MHz:
This website contains why and how I created this antenna.
Lots of pictures of the construction details are included.
Also it includes a bunch of measurements (SWR, Impedance).
By now this has become my main 2 meter antenna.

This month I finally finished the polarization switch:
Suggested by Rob, PE1ITR, I re-used a design by SM5BSZ.
Now I can select either horizontal, vertical, RCHP or LHCP.
With the 2x6 elements in 'X' position this is a great solution.
Also here detailed measurements, with help of the miniVNA of Rob.

Especially for LEOs with fast changing polarization and deep
QSB circular polarization is comfortable.

Please let me know if any questions !

73, Henk

More information about the AMSAT-BB mailing list