[amsat-bb] Eggbeaters--Extending Distance From Radials

[KD2NFC, Joe Puma]

I have this available if anyone’s interested.  One radial got damaged on the 70cm but I’m trying to replace/ remake the part. 

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Joe
KD2NFC

Sent from my iPad

> On Nov 19, 2019, at 9:49 PM, SCOTT MCDONALD via AMSAT-BB <amsat-bb at amsat.org> wrote:
> 
> Wes-  I’m inclined to agree with Jeff because I did that modification.
> 
> The easiest way to lower the ground plane is to remove the bolt that holds the radial plate to the antenna base and insert a piece of threaded rod of the correct length.  I just threaded a piece of solid aluminum rod on the ends and it worked well.  I can send you a pic if you want to see it.
> 
> Because I had 2 used EB432 I was able to do a head to head comparison and there is a noticeable improvement.  But it is not as good as a small CP beam.  If you have to run omnis I think the mod is worth it.
> 
> Good luck.
> 
> Scott ka9p
> 
> Make something good happen!
> 
>>> On Nov 19, 2019, at 6:52 PM, Jeff Moore via AMSAT-BB <amsat-bb at amsat.org> wrote:
>> Look up Texas Potato Mashers - I think that is what you are looking for.
>> They supposedly work a lot better than Egg Beaters but even then, they are
>> likely a poor substitute for a small beam.
>> Jeff Moore  --  KE7ACY
>> CN94
>>> On Tue, Nov 19, 2019 at 10:56 AM Wes Baden via AMSAT-BB <amsat-bb at amsat.org>
>>> wrote:
>>> New AMSAT member here, hoping to get on the air in the new future.  I'm
>>> looking at the M2 Eggbeaters and I have a question that perhaps someone has
>>> thought about already or better yet done some modeling for.  Specifically,
>>> has anyone replaced the 6 inch standoff mast on the EB-144 with something
>>> longer, and if so, how long, thus increasing the distance between the
>>> element loops and radials?  (Also, would this even be possible on the
>>> EB-432 as it looks like there is no standoff mast and instead the body
>>> assembly attaches directly to the radial plate?)  My thinking, perhaps
>>> faulty, is that extending the distance between the element loops and
>>> radials on both models would have the desired effect of flattening out the
>>> elevation pattern.  That is, there would be less gain overhead (where
>>> satellites appear less frequently and high gain really isn't needed) but on
>>> the other hand gain would be increased in the 15-45 degree range.  Has
>>> anyone modified the Eggbeaters in this way?  Alternatively, has anyone
>>> modeled Eggbeaters with longer standoff masts?  Is there an optimal
>>> distance for standoff masts for both models, for using satellites that are
>>> on the air at the present time?  Thanks!  Wes NA1ME.
>>> _______________________________________________
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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
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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.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb