[Antennaware] EZNEC how to model a 4:1 balun

[Joe Subich, W4TV]

 > I am mainly interested in the impedance transformation to the 50 ohm
 > feedline coax.

Why not just use Alternate SWR Zo = 200 Ohms?  That will give you the
50 Ohm SWR after the 4:1 "balun" assuming the balun is a broadband
current balun.

Otherwise, you can use a second short wire, move your source to it,
and place a *1:4 transformer* between that wire and the location of
your original source.

73,

    ... Joe, W4TV

On 3/25/2024 1:36 PM, David Gould wrote:
> I am using Pro/2 v 7.0.
> 
> I have been through the EZNEC help and the test drive around the track, 
> but the examples are all more complex than I am looking for so I am 
> having trouble getting to the basics.
> 
> I would like to model a variation of a centre fed dipole (over a wide 
> frequency range) that has a 4:1 balun at its feed point.   Is there an 
> example anywhere I could use to copy from?
> 
> Currently I am just using a straight wire with the source at 50% along. 
> Can I develop from this or do I have to split it into two separate wires?
> 
> I am mainly interested in the impedance transformation to the 50 ohm 
> feedline coax.
> 
> Any help would be appreciated.
> 
> 73,
> 
> Dave  G3UEG
>