[amsat-bb] Re: Antenna Question
kq6ea at pacbell.net
Wed Jul 1 20:13:10 PDT 2009
I'd have to say "It Depends". A 'regular' QHA has about zip for gain on the horizon where you really need the it, although I've read where the "extended" QHA's have a 'flatter' pattern, with the gain squeezed down towards the horizon.
Same with eggbeaters. I have a pair of the M2 units, and even with good quality preamps, they leave a LOT to be desired on low-elevation passes, which is what most passes wind up being. Jerry, K5OE, has a modified eggbeater-II design that pulls the pattern down towards the horizon quite a bit. I built a pair of these years ago, and they seemed to work well. Unfortunately I no longer have them, so I can't do an "A-B" comparison against my M2 units.
An altenative would be to build a Lindenblad like Tony AA2TX designed. I have the parts collected to do just that, but won't have the time to build one for a few weeks.
73, Jim KQ6EA
--- On Wed, 7/1/09, Steve Bluemel <stevebluemel at gmail.com> wrote:
From: Steve Bluemel <stevebluemel at gmail.com>
Subject: [amsat-bb] Antenna Question
To: AMSAT-BB at amsat.org
Date: Wednesday, July 1, 2009, 5:17 PM
Just a quick Question. Quadrifilar Helix or Eggbeater? All other options
considered, which would you chose?
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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