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This is an antenna that author just built. Was intend for receiving the AO-27 downlink (at 436.800 +/- doppler). It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB.
 70cm : Antennas/70cm
Antennas projects for 432 440 MHz
Quadrafilar Helix antenna for 436 Mhz is listed on dxzone.com since 2007-03-02
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