Linked Dipole Ideas

A while back I was looking at some ideas for portable antennas for SOTA (Summits on the Air) and camping to use with my KX3. 

I have been pretty happy with my random wire antenna. At some point I will eventually start experimenting with End Fed Half Wavelength Antennas (EFHWA) as I have a couple of tuners and kits sitting around the shack. I also have a nice selection of mono band wire dipole antennas that I use for Field Day. (It is hard to be a dipole antenna.)

Another variation of the classic dipole might be something called a linked dipole. It is a dipole antenna with sections that can be linked together or removed to enable/disable bands. It is multi band antenna functionality wise but a single band at a time.

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I was wondering what the lengths of each section might so I built a quick spreadsheet to run the math for the bands of my primary interest.

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This is not a definitive design article for this project concept. It is simply some thoughts based upon some discussion within a local radio club for projects that we might build as a group event. I stumbled across some notes and thought that this might be an option.

Related links:
http://www.flickr.com/photos/john_clifford/535686398/
http://cqhq.wordpress.com/2011/03/19/linked-dipole-for-portable-operations-such-as-sota/
http://www.sotabeams.co.uk/band-hopper-ii-two-band-linked-dipole/

73 de NG0R