[amsat-bb] yagi design

Bert Audenaert audbert at gmail.com
Sun Mar 22 04:45:47 PDT 2009

Hi all,

Hereby my first mail on this BB. I want to start with satellite
communication. I already build an eggbeater antenna, but togheter with my
TS2000 i receive only very poor signals. To work more comfotable, i want to
build two yagi antennas (one for 2m and one for 70cm) with an
azimuth/elevation rotor system.

For the 2m version, I took the following design of DK7ZB as a start:
http://www.qsl.net/dk7zb/start1.htm -> 144MHz yasis -> 6 El-28-Ohm (2m60).
Because I want to tune this antenna to the upper side of the 2m band (I  had
145.800MHz as center frequency in mind), I entered the data of this yagi in
MMANA GAL, a free NEC program (http://mmhamsoft.amateur-radio.ca/mmana/).
After Calculation, i got totally diferent results as on the DK7ZB website.

Please find the MMANA file as an attachment on this mail. What am i doing


Bert - ON4DMD

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