[Antennas] more questions

[Dan Richardson]

At 08:42 PM 1/26/2005, you wrote:

>Is it still a G5RV if I run more ladderline to it?

A G5RV is a 105' dipole which is fed with a specific ladderline/balun/coax 
arrangement. Using ladder line all the way to the tuner will result in a 
105' dipole that has the same pattern and gain. Its just fed slightly 
differently. Don't worry about it.

>
>
>I can't run all ladderline because I don't have a balanced tuner, so have 
>to go through a balun.
>
>What I was running previously was a 170'  dipole with ladderline feed from 
>outside my shack.  I ran approx 8' of coax out to a 4:1 balun, and 
>ladderline from there.
>
>During Hurricane Ivan, one of my dipole supports (big, tall tree) blew 
>down.  Now, I have a reduced horizontal span of approx 105'.  But, will 
>still have to run coax out the shack window to the balun.

That should work fine. Just keep the coax as short as possible. If you 
still are having trouble matching with your tuner then add a few feet of 
length to you ladderline.


>Should I add some downdrops on each end to help loading?  15' of downward 
>ends would give me an effective 132'.

Yes, if you are still having trouble matching adding a few feet to the 
antenna may resolve the problem as would adding a few feet to the feedline. 
Ether way you're just trying to get the impedance at the tuner within the 
tuner's tuning range.

73,
Danny, K6MHE


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