[amsat-bb] Fw: Fixed Antenna

[k6vug at sbcglobal.net]

 resending to the correct BB email address...
- Umesh

   ----- Forwarded Message ----- From: k6vug at sbcglobal.net <k6vug at sbcglobal.net>To: Randy Davenport <pastor.spaceboy at gmail.com>Cc: "amsat at amsat-bb.org" <amsat at amsat-bb.org>Sent: Saturday, May 9, 2020, 4:58:29 PM PDTSubject: Re: [amsat-bb] Fixed Antenna
  Please also see   https://www.rtl-sdr.com/simple-noaameteor-weather-satellite-antenna-137-mhz-v-dipole/
73!Umeshk6vug


    On Saturday, May 9, 2020, 4:52:52 PM PDT, k6vug at sbcglobal.net <k6vug at sbcglobal.net> wrote:  
 
  
Basically it is a inverted Vee made with stiff wire but mounted horizontally. 
The arms of the Vee facing into the AOS and along the path of the pass. 

This article should help - Center-fed Horizontal V-dipole

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Center-fed Horizontal V-dipole

KK4OBI

Discussion about Horizontal, Center-fed, V-dipoles. Gain, impedance, SWR, changes in characteristics with change...
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See 3rd paragraph, six to 12 feet off the ground/roof decouples it quite well from the surrounding.  
Just run the coax along the vertical support. 

Works best for NOAA and loud birds like AO-91, AO-92. 

NOAA image - noaa-18-201902021712-hvct_cm97.jpg

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noaa-18-201902021712-hvct_cm97.jpg

NOAA 18 southbound 60W at 02 Feb 2019 17:13:33 GMT on 137.9125MHz, HVCT enhancement, Normal projection, Channel ...
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73!Umesh





    On Saturday, May 9, 2020, 3:47:37 PM PDT, Randy Davenport <pastor.spaceboy at gmail.com> wrote:  
 
 How does a horizontal vee dipole work with the ham says?Randy ka4nma
On Sat, May 9, 2020, 5:53 PM k6vug--- via AMSAT-BB <amsat-bb at amsat.org> wrote:

 If you are ok with a nuts, bolts and small tools, a horizontal-Vee dipole is a great fun project to do and use, 
I demo NOAA WX sats with it. 

73!Umeshk6vug





    On Saturday, May 9, 2020, 12:45:52 PM PDT, Pedro Converso via AMSAT-BB <amsat-bb at amsat.org> wrote:  

 If you have a piece of 300ohm TV line, I have had reasonable success
with this simple low SWR, dual band antenna, specially on the more
common low elevation passes:

http://amsat.org.ar/Dual-Band_VHF-UHF_Twinlead_J-Pole_Antenna_pdf-notes_201903101154(1).pdf

73, lu7abf, Pedro

On 5/9/20, GEO Badger via AMSAT-BB <amsat-bb at amsat.org> wrote:
> Oops, this should have gone to the list. My two way wrist watch is acting
> up.
> Or build a j-pole for 70cm. All these can be built inexpensively with items
> from your local home improvement store. You might also contact local hams.
>
> BTW, since it is for RX only, the dimensions aren't very critical.
> ---
>  Ciao baby, catch you on the flip side
> 73 de W3AB/GEO
>
>  http://www.w3ab.org
>
> You can say "over", you can say "out", you just can't say "over and out".
>
>    On Saturday, May 9, 2020, 11:32:23 AM PDT, Gregory Beat via AMSAT-BB
> <amsat-bb at amsat.org> wrote:
>
>  START with SIMPLE ... Build a Vertical Dipole for 70cm,
> then LISTEN to RS-44 beacon and linear transponder.
> https://amsat-uk.org/2020/04/30/dosaaf-85-rs-44-amateur-radio-transponder-activated/
>
> 20 years ago, Jerry Brown, K5OE wrote a series of DIY Antenna Construction
> articles, some of these were published in the Amsat Journal.  These
> satellite and VHF/UHF antennas were built by countless AMSAT members across
> the world.
> http://wb5rmg.somenet.net/k5oe/
>
> Eggbeater II Omni LEO Antenna
> http://wb5rmg.somenet.net/k5oe/Eggbeater_2.html
>
> Texas Potato Masher II Antenna
> http://wb5rmg.somenet.net/k5oe/Texas_Potato_Masher_2.html
>
> 70cm Quagi Antenna
> http://wb5rmg.somenet.net/k5oe/70cm_quagi.html
>
> Jeff, K7XQ had problems with all Eggbeater designs (not impressed with
> performance).
> He developed a Tall Quadfillar Helix Antenna ... but no longer posted on web
> page.
>
> greg, w9gb
> AMSAT-NA, AMSAT-UK
> ==
>
> Date: Sat, 9 May 2020 10:53:55 -0600 (MDT)
> From: James Johnson, VA7CND
> To: AMSAT-BB Reflector
> Subject: [amsat-bb] Fixed Antenna
>
> I have been trying to find a used Eggbeater or similar antenna to use to
> listen for Satellites.
> The exchange on the USD to CND currency is a killer. I noticed many plans to
> build one on the internet.  Any suggestions which one would be worth trying
> for RX to start?
>
> 73, VE7HJ
> _______________________________________________
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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!
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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

_______________________________________________
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