Could you please explain, using an MFJ antenna analyzer, what is the meter
showing on the instrument?
I would think that the total system, that is feedline and flat top or
antenna if you prefer, is resonating at the point shown on the meter? Or am
I wrong? In any case, I love that device for checking out the "resonant"
point of the antenna system - note that I did not say just antenna.
Thank you
Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com - the CRA Website
Now with PayPal
CRA Nets: 3805 Khz every Monday at 8 PM EST
and 14255 every Saturday at 12 Noon EST
----- Original Message -----
From: "Gary Schafer" <[EMAIL PROTECTED]>
To: "'Discussion of AM Radio'" <[email protected]>
Sent: Thursday, April 20, 2006 10:12 PM
Subject: RE: [AMRadio] antenna tuners
This is another tidbit to keep in mind for those that still may think that
an antenna has to be resonant to give 1:1 swr.
A dipole antenna rarely is 50 ohms at resonance. It is very dependent on
height above ground as to what impedance it presents at the feed point. It
can range anywhere from below 30 ohms to above 70 ohms.
So if you cut your antenna so that you have 1:1 swr at the transmitter end
of the coax, the antenna is probably not tuned to resonance! You have
detuned the antenna to change its impedance that the coax sees.
Only rarely does a resonant antenna turn out to be 50 ohms.
73
Gary K4FMX
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