[amsat-bb] ARRL Antenna book, eggbeater antenna designs

Sat May 4 22:10:51 UTC 2019

I'll add the TX/RX angles for the ISS so we can compare those too.

73s

Robert
KE6BLR

On Sat, May 4, 2019 at 1:11 PM John Brier <johnbrier at gmail.com> wrote:

> Forgive me, I see those are PSAT packets. Dunno what its power is.
>
> 73, John Brier KG4AKV
>
> On Sat, May 4, 2019, 16:09 John Brier <johnbrier at gmail.com> wrote:
>
>> Not disputing the utility of egg beaters, but fwiw the ISS is the most
>> powerful ham transponder we have. The Ericsson is speced at 4 or 5 watts.
>>
>> 73, John Brier KG4AKV
>>
>> On Sat, May 4, 2019, 16:02 KE6BLR Robert via AMSAT-BB <amsat-bb at amsat.org>
>> wrote:
>>
>>> >>> 7 DEGREES RX via EggBeater <<<
>>>
>>> N6DAN-1 gets APRS packets on 145.825 MHz as low as 7 degrees via the
>>> EBB144.
>>>
>>> See Tweet of report:
>>> https://twitter.com/MachaleRobert/status/1124763800865873920
>>>
>>> I asked him to leave the EBB on the N6DAN-1 iGate for the entire month of
>>> May to get performance metrics. He also has a directional antenna for
>>> N6DAN-2.
>>>
>>> For the pSat, you can monitor the TX and RX angles here:
>>>
>>> http://www.spaceCommunicator.club/igates/
>>>
>>> 73s
>>>
>>> Robert
>>>
>>>
>>> On Fri, May 3, 2019 at 4:03 PM Bob Liddy (K8BL) via AMSAT-BB <
>>> amsat-bb at amsat.org> wrote:
>>>
>>> >  I got a good chuckle out of KG5CCI's link to the MFJ Dummy
>>> >   Loads.
>>> > Quite a few years back, I picked up a pair of the M2 Eggbeaters at a
>>> > Hamfest for $150. I put them up with some 9913 and found that they were
>>> > very close to being Dummy Loads in the sky. That was probably why the
>>> guy
>>> > was selling them so cheap. They were sold again a couple years ago at
>>> > Dayton for the same price. Lesson learned.
>>> > I always thought the concept was very good, but the results were very
>>> > disappointing. That was before the excellent performing SATs we have up
>>> > there now. Maybe they would have moderate success now, but I wouldn't
>>> get
>>> > my hopes up.
>>> > My suggestion would be to get/build a couple small Yagis and put them
>>> on a
>>> > mast several feet apart with the 70cm above and the 2M below with one
>>> > vertical and one horizontal polarized. Tilt them up 15-20 degrees and a
>>> > cheap TV Rotor is all you need. The tilting can  be done by fashioning
>>> a
>>> > mast-to-boom plate drilled for the desired  angle for each antenna.
>>> Or, you
>>> > could merely bend the mast that small  amount. This should give you
>>> > reasonable success until you decide you  have the experience to get
>>> more
>>> > sophisticated and will not have spent  a bunch of money initially.
>>> > GL/73,     Bob  K8BL        (AMSAT #6593 since 1979)
>>> >
>>> >     On Friday, May 3, 2019, 5:00:48 PM EDT, David Swanson via AMSAT-BB
>>> <
>>> > amsat-bb at amsat.org> wrote:
>>> >
>>> >  Hi Sean!
>>> >
>>> > I don't recall seeing any name calling here until your post, I
>>> genuinely
>>> > want to make sure the author of this thread who has sent numerous
>>> emails to
>>> > this list explaining how to operate gets the best tips in regards to
>>> their
>>> > planned build. I'm actually in the process of building the setup I
>>> > recommended and will plan on doing a demo for folks sometime here soon,
>>> > stay tuned!
>>> >
>>> > -Dave, KG5CCI
>>> >
>>> > On Fri, May 3, 2019 at 3:51 PM Sean Waite <waisean at gmail.com> wrote:
>>> >
>>> > > Ah, yes, rather than maybe educate someone let's just berate them and
>>> > > functionally call them an idiot.
>>> > >
>>> > > Eggbeaters have a bad rap because they don't necessarily hear well.
>>> You
>>> > > may be making it into the bird but not hearing yourself, so you keep
>>> > tuning
>>> > > around and calling trying to find yourself only to be deaf-ly QRMing
>>> > other
>>> > > stations. I have no experience with them, but that's what I've heard.
>>> > >
>>> > > 73,
>>> > > Sean WA1TE
>>> > >
>>> > > On Fri, May 3, 2019 at 4:49 PM David Swanson via AMSAT-BB <
>>> > > amsat-bb at amsat.org> wrote:
>>> > >
>>> > >> Instead of building eggbeaters, pick up a few of these:
>>> > >>
>>> > >> http://www.mfjenterprises.com/Product.php?productid=MFJ-261
>>> > >>
>>> > >> You'll also need a pair of these:
>>> > >>
>>> > >>
>>> https://www.amazon.com/Coaxial-Cable-Female-SO239-PL259/dp/B00KQHH7VC
>>> > >>
>>> > >> Hook those into your baofengs and you'll be just as effective on the
>>> > >> Satellites as you would with some homemade 'beaters.
>>> > >>
>>> > >> Good luck! 73!
>>> > >>
>>> > >> -Dave, KG5CCI
>>> > >>
>>> > >> On Fri, May 3, 2019 at 3:19 PM Devin L. Ganger via AMSAT-BB <
>>> > >> amsat-bb at amsat.org> wrote:
>>> > >>
>>> > >> > Greetings, programs!
>>> > >> >
>>> > >> > I'm looking to work with my son (who will be studying to get his
>>> > >> > Technician license later this month) on building a UHF/VHF pair of
>>> > >> > eggbeater antennas. I've found a few papers online, but does
>>> anyone
>>> > >> have a
>>> > >> > good reference to a detailed design?
>>> > >> >
>>> > >> > Does the ARRL Antenna book latest edition have any significant
>>> > coverage
>>> > >> of
>>> > >> > eggbeaters at all? I have an older version that has nothing.
>>> > >> >
>>> > >> > Also, most of the designs I see are for a single band. If you're
>>> > >> deploying
>>> > >> > a pair for satellite operations, do you simply attach them
>>> through a
>>> > >> > duplexer? I have a Diamond MX-72N that I picked up a while ago for
>>> > using
>>> > >> > with dual Baofengs, but it's been sitting in my drawer since I
>>> picked
>>> > >> up my
>>> > >> > TH-D72A. It has a 1.6~150MHz lead and a 350~460MHz lead.
>>> > >> >
>>> > >> > Thanks in advance for any pointers you might have.
>>> > >> >
>>> > >> >
>>> > >> > --
>>> > >> > Devin L. Ganger (WA7DLG)
>>> > >> > email: devin at thecabal.org<mailto:devin at thecabal.org>
>>> > >> > web: Devin on Earth<http://www.devinonearth.com/>
>>> > >> > cell: +1 425.239.2575
>>> > >> >
>>> > >> > _______________________________________________
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>>> views
>>> > of
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>>> > >> _______________________________________________
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>>> available
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>>> > >> AMSAT-NA.
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>>> > >
>>> > _______________________________________________
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>>> > to all interested persons worldwide without requiring membership.
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>>> >
>>> > _______________________________________________
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>>> > to all interested persons worldwide without requiring membership.
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>>> > expressed
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>>> >
>>> _______________________________________________
>>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> are solely those of the author, and do not reflect the official views of
>>> AMSAT-NA.
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>>