Ramsey Electronics DA-160 Benutzerhandbuch

RAMSEY DA SERIES  DIPOLE ANTENNA 

Page  15  

 
 
TUNING YOUR ANTENNA 
 
   Hook up your radio to an SWR meter and the antenna.  Set it for a portion 
of the band that you think you will be using most often.  Since all of our 
antenna length calculations are for the center of the band, the antenna 
should be slightly longer if you wish to work below this frequency, and 
slightly shorter if you work above it.  Reduce your power down to it’s lowest 
setting and transmit on a clear frequency.  Your SWR meter should now be 
measuring the SWR of your antenna.  You will notice that if you tune up or 
down, this will change.  Try this, and note whether or not the SWR gets 
higher or lower as you go up in frequency.  If it gets higher as you go up, the 
antenna needs to be shortened.

 

 
   Back outside again (or get a buddy to stand out there), cut about one inch 
off of each end of the antenna wire.  Rekey your transmitter and repeat the 
same test over.  If the antenna still needs to be shortened, cut off a bit more.  
Over and over, perform this test until the frequency that you wish to tune the 
antenna at has a lower SWR than the frequencies above or below it.  Now 
that your antenna has been successfully tuned, you are ready to try making 
a few contacts.