[TowerTalk] Antenna Question

[K4SAV]

W5PVR wrote "..... Eznec says I will have a 7:1 SWR.  A 1:1 Balun would 
convert that to 50 Ohms with the 7:1 SWR. My question is what happens if 
I use a heavy duty 4:1 Balun. "....

Since you are already using EZNEC, why not use EZNEC and add a 
transformer.  That will look like an ideal current mode balun.  In 
EZNEC, you can also add whatever transmission line you want (including 
its loss coefficient), vary its length, and see what that does.  By 
doing two plots, one with zero attenuation for the transmission line and 
one with the real attenuation, you can subtract the two answers and get 
the feedline loss.

Jerry, K4SAV


Robert Kirkland wrote:
> When I put up my low frequency dipole from the tower to a tree it will be 
> center fed with 450 Ohm ( home made ) open wire line. Eznec says I will have 
> a 7:1 SWR. A 1:1 Balun would convert that to 50 Ohms with the 7:1 SWR. My 
> question is what happens if I use a heavy duty 4:1 Balun. Do I divide the 
> 7:1 ratio by 4, or what?. And a why, would be helpful. Also throw in any 
> math. Thanks.
> Bob, w5pvr
>  
>
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