XPost: sci.military.naval, sci.space.shuttle, alt.conspiracy   
   XPost: sci.astro.amateur   
      
   Richard Casady formuleerde op zaterdag :   
   > On Fri, 12 Sep 2008 22:06:12 +0200, André, PE1PQX   
   >  wrote:   
   >   
   >> The antenna gain mentioned is from a directional antenna (a dipole,   
   >> reflector and director) a.k.a. Yagi. The 'antenna'-gain is compared to   
   >> an isotrope-antenna. The RF energy is not actually amplified, but   
   >> directed in one particular direction. This is also called 'gain'.   
   >>   
   >> ERP also means 'Effective Radiated Power' (or something similar)   
   >   
   > Yagi's work reasonably well. Millions of TV's and thousands of radio   
   > amateurs will attest to that. You were hot shit if you had a rotator.   
   > The hams sometimes stacked several, for different bands, on the same   
   > tower.   
   >   
   > Casady   
      
   So have I.   
   I have 2 VHF 16 element yagi's stacked together. Estimated 'gain' is   
   about 18 dB. Boomlength of one yagi is about 6.5 meters (about 22 feet)   
   long.   
   Small picture here: http://www.pe1pqx.eu/pics/hamradio/hamradio.jpg   
   I can rotate the stack 360 degrees around.   
      
   André (Ham-radio operator, PE1PQX)   
      
   --- SoupGate-Win32 v1.05   
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