[amsat-bb] Re: eggbeater II antenna performance oscar 50-52
Bruce Robertson
broberts at mta.ca
Fri Aug 17 19:20:55 PDT 2007
Quoting KC2MHU <kc2mhu at ramsat.org>:
> I used a 70cm version for several years for satellite reception. I would
>
> recommend adding a preamp.
>
> Bob KC2MHU
>
> Eric Fort wrote:
> > Can anyone here comment on the performance of the KO5E Eggbeater II
> antennas
> > for use on oscar 50-52. Does anyone have personal experience with
> this
> > configuration?
Do I remember correctly that designs such as this are less circularly
polarized at the low elevations than they are overhead? If so, have you
considered the Lindenblad by Tony, AA2TX?
http://www.arrl.org/qst/2007/08/monteiro.pdf
If you're building either antenna specifically for VO-52, you might
consider making it LHCP, which I believe is the polarization of the 2m
signal transmitted by Hamsat. (Tony reports that his RHCP design
nonetheless receives VO-52 well.)
A low noise preamp at the antenna will make a huge difference also at 145 MHz.
73, Bruce
VE9QRP
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