Building Ground Plane antennas

[Caesar]

I once built a ground plane antenna for x-mitting on 2m ham, before i got my beam, and i am thinking about making one or two for just recieveing for some different ranges, wondering if there is a site or something with good information on best type of wire to use and lenghts the wires should be from the so-239.

thanks for any help...

 

[LarrySC]

50' and under best length. RG-8x or RG-6. Ground plane not best choice for scanning or monitoring unless antenna has GAIN. Consider a commerical made NMO mount by MAXRAD. This is the industry standard fitting for commerical antennas. For the VHF/UHF or 800 mounts there would be 200 antennas that would fit it. Base kit does come with ground elements for whatever band mount you get. Look at base kit at this site. Note that the 800 base kit comes "N" connector and supplied with "F" adp. www.bncantenna.com

 

[Al42]

I once built a ground plane antenna for x-mitting on 2m ham, before i got my beam, and i am thinking about making one or two for just recieveing for some different ranges, wondering if there is a site or something with good information on best type of wire to use and lenghts the wires should be from the so-239.

If you're talking about element lengths, the same as always - 1/4 wavelength.

But if you're in a building mood, and you want a broadband scanner antenna, why not build a discone?

http://www.funet.fi/pub/dx/text/antennas/discone1.txt
http://www.hard-core-dx.com/nordicdx/antenna/hidden/indoor.html
http://hamradio.online.ru/ftp/discone.pdf

 

[jhooten]

If you're talking about element lengths, the same as always - 1/4 wavelength.

But if you're in a building mood, and you want a broadband scanner antenna, why not build a discone?

http://www.funet.fi/pub/dx/text/antennas/discone1.txt
http://www.hard-core-dx.com/nordicdx/antenna/hidden/indoor.html
http://hamradio.online.ru/ftp/discone.pdf

Thank you. The second one you listed had the information I have been searching for for the last three hours. I found every formula but the one for the distance between the disc and the cone.

 

[Al42]

Thank you. The second one you listed had the information I have been searching for for the last three hours. I found every formula but the one for the distance between the disc and the cone.

Glad to help. My wife is Queen of the Internet - if she can't find it, it hasn't been posted yet. I guess some of her techniques have rubbed off on me.