[amsat-bb] Re: EggBeater

Samudra Haque samudra.haque at gmail.com
Tue May 29 14:13:06 PDT 2012


Yes, I considered LMR-400 and above, but due to the rigid bending limits of
those cables, I went down the scale to LMR-240 for this first install, the
cable is almost as flexible as RG-58/59 etc. ...

On Tue, May 29, 2012 at 4:55 PM, Kevin Deane <summit496 at live.com> wrote:

>  *Hello, figured I would give my two cents... I have gotten in with many
> antennas and many radios. They say five watts is all you need with a
> directional ant. I have worked AO-27 with a hustler mag mount and a FT7900,
> only for a short time of course because it is not getting into the bird
> that matters, it is hearing it.*
> **
> *Whatever you use for receive make sure you have the best coax or
> something like 9913, or lmr 400, because I found out the hard way that the
> DB loss in bad or cheap coax will kill you bigtime. I have not tried an
> eggbeater, but have tried the log periodic, and yagis. Like I said the
> verticals, mag mount and base ant, work for closer passes for a few minutes.
> *
> **
> *If you can do full duplex that is the best way for sure, as you can hear
> yourself and not cause Qrm. Probly was not much help here but I have heard
> people have had great success with the egbeater. Maybe add a preamp at the
> receive ant mast...*
> **
> *Anyway good luck, and remember if you cant hear people clearly dont
> bother to transmit, everyone gets all bent out of shape.
>
> *
>
> *Kevin*
> *KF7MYK*
>
>
>
>  > From: samudra.haque at gmail.com
> > Date: Tue, 29 May 2012 16:17:48 -0400
> > To: kl7uw at acsalaska.net
> > CC: amsat-bb at amsat.org
> > Subject: [amsat-bb] Re: EggBeater
> >
> > Hello, can I ask a question related to this several-years old thread? At
> > George Washington University, this fall we will be on the air and are
> > buliding up an amateur radio club ground station from scratch. Currently
> we
> > are collecting equipment, cables, etc., while we wait for the
> construction
> > to begin on a new door in the interior of a third floor class room space
> to
> > let us use that area as a "radio room" or something like that. At my home
> > QTH, I'm testing out the radios we can use, and would like to both
> receive
> > and transmit - with omni antennas (e.g., eggbeaters, QHA ) and later
> AZ-El
> > yagis.
> >
> > Assuming an LNA is used at the antenna for the RX path, would it be
> > practical to use that same omni for uplink? What are the recommended
> power
> > settings for such an uplink for any of the recent amsats?
> >
> > If there was a constraint (for the summer into fall) of operating in a
> > limited visibility area, and approximately 50 sq. ft of open access
> (i.e.,
> > 21 ft monopole mast with open free area about 4 ft dia.) would that be
> > adequate for any sort of uplink antenna? The good thing is that the
> > ultimate location of the club station antenna farm is huge, but for now
> > this is what we have. I'm open to AZ-El positioners but the mast loading
> > limit is pretty small for now.
> >
> > Any suggestion welcome.
> >
> > Regards,
> >
> > Samudra N3RDX
> >
> > On Thu, Apr 16, 2009 at 9:50 PM, Edward Cole <kl7uw at acsalaska.net>
> wrote:
> >
> > > Drew,
> > >
> > > Thanks for the document on this antenna. I was going to try resizing
> > > the 2m Lindenblad design of Tony's but this will be a snap for me. I
> > > have 1/8-inch rod elements from an old Cushcraft yagi that
> > > disintegrated long ago and have some 1/2-inch sched-40 aluminum pipe
> > > (7/8 inch OD) that will work fine for the vertical. I can get the
> > > PVC from my local building supply. Only need to order ferrites from
> > > Mouser. Since I will place a 432 preamp at the antenna a short run
> > > of RG-58 or mini-8 will suffice. I probably will make some variation
> > > in the materials used. I did that on the 2m Lindenblad (not assembled,
> > > yet).
> > >
> > > 73, Ed - KL7UW
> > >
> > > At 08:02 AM 4/16/2009, Andrew Glasbrenner wrote:
> > > >Consider trying AA2TX's excellent parasitic lindenblad design. Unlike
> the
> > > >overpriced eggbeater, it puts the gain on the horizon where it is
> needed,
> > > >and is circular across the pattern. The parts mostly are from your
> local
> > > >hardware store, and in Tony's typical fashion, it is simple to
> assemble
> > > and
> > > >works well.
> > > >
> > > >73, Drew KO4MA
> > > >
> > > >----- Original Message -----
> > > >From: "Bill Dzurilla" <billdz.geo at yahoo.com>
> > > >To: <amsat-bb at amsat.org>
> > > >Sent: Thursday, April 16, 2009 11:56 AM
> > > >Subject: [amsat-bb] Re: EggBeater
> > > >
> > > >
> > > > >
> > > > > Steve,
> > > > >
> > > > > I have both a commercial and a homebrew Eggbeater and am
> disappointed
> > > with
> > > > > both, especially in light of its rather high price. Connected to my
> > > > > IC-7000 via an ARR mast-mounted preamp, performance is far less
> than
> > > with
> > > > > an HT and an Arrow. Guess an omni can't cut it, at least not from
> my
> > > QTH.
> > > > >
> > > > > Maybe if I could get it up higher, clear of all roofs, it would do
> > > better.
> > > > > I can make contacts at relatively high sat elevations, but can do
> just
> > > as
> > > > > well with a $10 dual band ground plane. My friend has an Eggbeater
> and
> > > > > the same preamp at a clearer QTH, and he hears substantially
> better,
> > > down
> > > > > to 10 degrees elevation in some directions.
> > > > >
> > > > > Good luck and 73,
> > > > > Bill NZ5N
> > > > >
> > > > >> > Hi Steve,
> > > > >> >
> > > > >> > It is surprising to read that you are not hearing
> > > > >> anything. I have
> > > > >> > repeatedly used a 2m and 70cm Eggbeater for the sats
> > > > >> and have had no
> > > > >> > problem hearing things. No pre-amp.
> > > > >> >
> > > > >> > I was using a short cable (e.g. less than 10 meters).
> > > > >> The rigs I
> > > > >> > used were a FT-736r (deaf) and a FT-847 (so-so).
> > > > >> >
> > > > >> > 73,
> > > > >> >
> > > > >> > Dave
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the
> > > author.
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> > > program!
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> > > >
> > > >_______________________________________________
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> > >
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> > _______________________________________________
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