[amsat-bb] Re: AO-7 Mode A antenna

James Jipping jhjipping at ameritech.net
Sun Oct 31 06:32:54 PDT 2010

Back to  the "Good Ole Days".  The best antenna I ever had to receive 
sat signals on 10 meters was a pair of crossed dipoles at an angle of 45 
degrees to the steel tower.  It worked very well in several 
configurations.  The  two dipoles were:

1. Just tied in parallel.  Impedance matching was a little bit of  a concern
2. I tried a pair of impedance matching stubs much like that used for 
circular polarized antennas for 2 m and 70 cm.
3 I tried a pair if relays that allowed me to select any pair of  the 
four legs for some sort of directivity using the tower as a "reflector"

I used this configuration for all the old AMSAT and Russian mode A birds 
with with much better than avearge success.
Helpful ??  Hope so!

Jim Jipping, W8MRR
AMSAT #  5512
Low number translates to old geezer

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