[amsat-bb] Re: EggBeater

Edward Cole kl7uw at acsalaska.net
Thu Apr 16 07:27:54 PDT 2009

I can echo what Bruce says!  {uh pun intended}

Early after "Echo" (AO-51) was launched I set up a ground-plane 
antenna with a 432-MHz preamp and copied telemetry quite well.  The 
antenna was a 1/4 wave 2m mag-mount whip (19-inch) set on a 12-inch 
square of sheet metal.  The preamp was attached to the 12-foot run of 
RG-58.  It has the same GasFet as used in the ARR preamp with about 
0.5 dB NF and 20 dB gain.

BTW you will find the ARR is a good choice for satellite, and I will 
predict that you will be very happy with the results used with the 
eggbeater.  Only a small yagi will better your eggbeater.

73, Ed - KL7UW
got materials to build my AA2TX 2m-Lindenblad.  Tony have you any 
dimension for a 432 version?

At 05:31 AM 4/16/2009, Bruce Robertson wrote:
>On Wed, Apr 15, 2009 at 2:36 PM, Rick - WA4NVM <wa4nvm at comcast.net> wrote:
> >
> > Steve,
> >
> > Good luck with your testing.  The ISS and A0-51 haven't been on for you
> > to try with your setup.  Try S0-50 and A0-27 at this time.
> >
> > Look for you on the birds,
> > Rick- WA4NVM
>Thanks for sharing your experiments with us, Steve.
>In my experience, with a omni antenna and no preamp, these two 70cm
>satellites are very difficult to hear if there is any significant
>amount of cable between the antenna and the radio. On the other hand I
>find that a low-noise preamp *at the antenna* with a well-built omni
>antenna should hear at least parts of their passes. If you're unsure
>that your egg-beater is working properly, consider using a simple 1/4
>wave vertical with legs of about 6" at 70cm. Put this as close to the
>preamp as possible: I constructed mine out of the connector that mates
>with the preamp's connector!


>73, Bruce
> >> Well, Im sorry to say that my Egg Beater experiment has yet to yield any
> >> good results. I have attempted passes on IIS, AO-51, and SO-50 and not
> >> heard
> >> a single contact. Im a trying some reconfiguring and will keep at it. I
> >> will
> >> post pictures of my progress soon and would appreciate any observations
> >> you
> >> might have.
> >>
> >> I'll tell you, the Pre-amp thread could not have been more timely. I just
> >> ordered one from ARR. If im lucky....and im always lucky, this will make
> >> some difference.
> >>
> >> In the mean time, I will listen for you all with the Elk and HT!
> >>
> >> Cheers!
> >>
> >> Steve KI6OQU

More information about the AMSAT-BB mailing list