-=> On 10-24-97  12:26, Miha Valencic said to Ivy Iverson,<=-
-=>"About Antenna gain...,"<=-
-=> Ivy Iverson wrote in a message to Miha Valencic:
 
Hi, Miha;
 
 II> ERP means Effective Radiated Power.  It indicates how much
 II> power your antenna WOULD be if you were using some standard
 II> antenna, such as a dipole.  The gain comes from the design
 II> of the antenna.  For every 3 dB, (DeciBels), of gain you
 II> EFFECTIVELY double the power.  So if you feed 5 Watts into
 II> an antenna with 3 dB of gain, your EFFECTIVE power is 10
 II> Watts...
 MV> Yes, because it is directed... It takes energy from where it is not
 MV> needed and  directs it to single direction, therefore you have gain. I
 MV> understand now. OK,  thanks for the explanation.
 
My pleasure.
 
In the 6 dB J-pole, it takes energy from the "up" and "down" directions
and puts it out toward the horizon.  In a beam it takes it from the sides
and back and puts it toward the front where you want it.
 
 MV> BTW, you don't get my Netmail, do you?
 
Yes, I am the SysOp here, so I get all the netmail that comes to this
BBS.  I just checked and I did get your netmail.  I am very sorry, I
haven't had time to reply, but since it's general interest for Hams and
hasn't been posted in a while, I will post it here for you.  I have
UUencoded a detailed drawing, (using high-ASCII characters), which I will
post in a separate message to you.  Do you have UUDECODE.EXE?
 
Just curious - Where are you located?  I checked the nodelist and it
gives the name of the cities, but I didn't find the country listed.
The names appear to be Russian, but for all I know they could be
European, (like Scandinavian).  Don't mind me, I'm TERRIBLE on
geography, especially the names of places).   
 
73 DE KB9QPM
   Ivy
 
 
 
... Double your dipoles. Double your flux.
 
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