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

Fri May 3 23:00:26 UTC 2019

 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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>> _______________________________________________
>> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
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>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>
_______________________________________________
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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.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb