I have built a dipole antenna was wondering if any one has tryied this before and has any idea what the plot would look like its very larage 1 1/4 wavelength long for 80 meters
Last edited by KI4WAU; 01-15-2011 at 03:27 PM.
That's not 1-1/4WL long on 80m, it's 1 WL. Or 1/2-WL on 160m.
It's a current fed dipole on 160m and a voltage fed one one 80m. The ladder line should transform the very hi-Z feedpoint on 80m down to something reasonable, making it easier to match on 80m.
Ought to work fine.
I guess the real question is: How's it working for you?
i thank the feed line is part of the antenna i went out and disconnected the tuner and connected the MFJ-259 to the ladder line the readings were 1:2 @55ohms so i took the tuner out and connected the 50 ohm coax to the ladder line went back to the shack and perfect match the only other thing i could do is install a 1:1 balun any one know what this would look like on a plot
I'm just wondering why you would need to go to all that trouble of making a mechanically sound dipole for 80 metres when a 135 ft of wire would achieve the same result.
Well, it won't really. The dipole he shows will work fine on 160m: A 135' dipole won't.
Originally Posted by G0GQK