At 09:48 PM 8/7/2007, Bill Ress wrote:
I'll second what Tony says, especially if you use the omni antenna's he has designed (which I also use and highly recommend - and they're really easy to build).
While Tony is modest, you can get his design and construction details for both his 146 and 435 MHz antenna's in the 2006 AMSAT Symposium Proceedings (available on the AMSAT website - I know a callous plug!!).
What? No AMSAT Proceedings handy?? Then try the current August 2007 issue of QST where Tony describes his 2 Meter EZ-Lindenblad. (Tony - will the 70cm antenna be in next month's QST??)
Regards...Bill - N6GHz
...
A "parasitic" Lindenblad?? Please fill me in! I just ordered all the aluminum tubing for the 2M version, and plan to build one soon after it gets here. Looking forward to comparing it to the M2 eggbeater I'm using now. 73, Jim KQ6EA
Hi Bill and Jim,
Thank you for the vote of confidence!
On 70cm, the dimensions are too critical to scale the EZ-Lindenblad. Instead, I developed a "Parasitic Lindenblad" antenna that uses just a single driven element along with a passive parasitic circular polarizer. This takes advatage of the small size of the elements on 70cm and is much easier to build.
I presented a paper on this at the last AMSAT Symposium but I have continued to work on improvements to make it even easier to build and to get rid of the ferrites that were needed. I hope to finish in time for this years Space Symposium.
73, Tony AA2TX