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Well I desided to get a new Antenna System, because I want to be heard on EME.The Antenna I have now is a 16 Elm. Tonna, that only can be turned in horisontal direction with my Yaesu G-2800DXC. On the Weinheim tour last year I was lucky to get a used Yaesu G-500 rotator for Elevation with controller unit. To Elevate an antenna with that kind of rotator I needed two antenna's.
At first I desided to buy 2 new antenna's. Two 2x11 Elm. Tonna type 20822, but at closer look, this antenna's are only for Satellite communication because it's elements are mouted like an X. I needed horisontal and vertical.
After searching a while on the internet and found that DK7ZB-Martin are making very good antenna's. I coresponed with Martin an a plan was made for a 9 Elm. Cross-Yagi antenna. Until now I have not seen anybody that have made DK7ZB cross antenna's in 9 Elm. for 2 meter - only 7 Elm. by DO1NBW.
Following data was planned with DK7ZB:
(Picture with measurements is comming soon)
Here are some pictures from the building of the antennas:
At the moment one boom is finished and all elements are ready. Next the other boom is to be made ready for elements.
More details of the project comes . (9.3.2010)
Look also at the Combiner I made for the project. |