I'm wanting to make an antenna for "talking with the birds", mainly ISS and LEOs. Thank you to Don ZL1THO and John KB2HSH for the suggestions and encouragement they have already e-mailed me.
I have done some more thinking since then and come up with the following list of criteria for the first antenna I make for satellite work: * easy to make * lost cost * omni-directional * good performance, especially for satellite work, without moving it * portable enough that I can pack it into the van when I go on holiday and it won't take up much space (it needs to share the space with all the stuff for my wife and 3 children, as well as me). It would also be nice to be able to store it in the corner of my office at work if I so desire.
When I started looking in earnest last Friday, a ham colleague of mine did a Google search an came across a turnstile antenna that looked promising (http://www.wb8erj.com/turnstile_antenna.htm). That evening, I noticed the eggbeater on the web site of John KB2HSH (http://kb2hsh.blogspot.com/), which looks nice and easy to build. I then did some searching and came upon the Eggbeater II by Jerry K5OE (http://members.aol.com/k5oejerry/eggbeater2.htm), arguably a better fixed antenna for satellite use than the original eggbeater. A while later, I also found the EZ-Lindenblad by Tony AA2TX (http://www.arrl.org/qst/2007/08/monteiro.pdf).
I am currently leaning towards the EZ-Lindenblad (for 2m) and a parasitic Lindenblad (for 70cm ... when I get hold of the design; I intend to e-mail Tony about it if/when I go ahead with the EZ-Lindenblad).
How do these antennae compare performance-wise? Am I leaning in the right direction (EZ-Lindenblad), or should I be looking at something else? Your input would be much appreciated.
TTFN., Graeme ZL2GDN