Slim Jim VHF air antenna from 300 ohm TV ribbon

[VK2GEL]

Gday could someone please post dimensions for a Slim Jim antenna centred on 127MHz, to be made from 300 ohm TV ribbon?

Thanks.

 

[tonyclark]

Google it, I did and found all sorts of info.

 

[SCPD]

Calculator

Gday could someone please post dimensions for a Slim Jim antenna centred on 127MHz, to be made from 300 ohm TV ribbon?

Thanks.

Lie the previous poster said, Google "j-pole calculator" to get a site that let's you plug in any freq you want, and get the dimensions. I'm sure someone will post a link to it now.

 

[benbenrf]

....... is there any reason specificaly why you wish to make this J-Pole out of 300Ohm ribbon?

 

[VK2GEL]

Yes so it will fit in 20mm conduit, thanks.