[Elecraft] Elecraft] KX2

[Don Wilhelm]

Charlie,

There is nothing wrong with making a true Zepp antenna for any band - we 
usually refer to them as a J-Pole that is popular at VHF/UHF.
Use 300 ohm transmission line for the 1/4 wave matching section.
See the works of Gary O'Neil N3GO on J-poles for discussion of the ideal 
characteristic impedance of the matching section.  See 
http://www.knightlites.org/n3go_workshop/N3GO_JPole.xls for a worksheet 
to give you all the details.

Your J-Pole does not have to be oriented vertically - it will work as a 
horizontal antenna or a sloper.  It can be bent between the radiator and 
the matching section.

73,
Don W3FPR

On 7/15/2016 8:34 AM, Charlie T, K3ICH wrote:
> Also, what's wrong with making a true "Zepp" antenna on the higher bands by
> adding the required length of twin lead for the ¼λ matching section?  On
> 20 M and up, this would result in a fairly easy length of wire to deal with.
>
> Anybody tried that approach? I know the "J-Poles" are popular on VHF, but
> how about a 20 meter wire J-Pole?
>