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CX2SA > SATDIG 24.01.12 21:10l 580 Lines 17634 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Quadrifilar antenna (Dave Guimont)
2. Re: Quadrifilar Helix antenna question (Mike Ryan)
3. Re: Quadrifilar Helix antenna question (i8cvs)
4. Re: Quadrifilar Helix antenna question (Dave Guimont)
5. HI4/AJ5C (Bob Herrell)
6. Some Key Players In Private Spaceflight (B J)
7. m9 class solar flare (Dave Guimont)
8. Re: Quadrifilar Helix antenna question (Mike Ryan)
9. Re: spaceweather.com (Joe Fitzgerald)
10. Re: spaceweather.com (Mark Lunday)
11. Re: m9 class solar flare (Mark Lunday)
12. Re: m9 class solar flare (Dave Guimont)
13. Re: m9 class solar flare (Dave Guimont)
14. Electronics Weekly Printed Edition - FUNcube satellite (Trevor .)
15. Article - "OSCAR-1 Launched 50 Years Ago" (Trevor .)
16. HI4/AJ5C update for Jan 24th (Bob Herrell)
----------------------------------------------------------------------
Message: 1
Date: Mon, 23 Jan 2012 12:24:54 -0800
From: Dave Guimont <dguimon1@xxx.xx.xxx>
To: <normn3ykf@xxxx.xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Quadrifilar antenna
Message-ID: <CE.07.15128.712CD1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Norm,
Always happy to yak sat info....Just drop me a note
>Dave,
>Thanks so much for your input. I am reading your pages with great intrest.
>73 de Norm n3ykf
>---- Dave Guimont <dguimon1@xxx.xx.xxx> wrote:
> > I've used them with great success at 435 and 2 m.
> >
> > Go to:
> > http://tinyurl.com/wb6lloOscar
> >
> > and see quadrifilar antenna articles...happy to answer any questions..
> >
> > Follow dimensions carefully on 435..
> >
> >
> >
> >
> >
> > 73, Dave, WB6LLO
> > dguimon1@xxx.xx.xxx
> >
> > Disagree: I learn....
> >
> > Pulling for P3E...
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> > Not an AMSAT-NA member? Join now to support the amateur satellite program!
> > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 2
Date: Mon, 23 Jan 2012 17:15:26 -0500
From: "Mike Ryan" <mryan301@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Quadrifilar Helix antenna question
Message-ID: <C4E0E574C85C4035A487814E46EE5244@xxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
QFH are a bear to build, especially on 70 cm unless you?re very , very
skilled. I tried 3 times and failed 3 times. Finally gave up and went with a
standard turnstyle. Still critical tolerances but much easier to make and
works lower on the horizon than the QFH. QHtenna used to sell turnstiles
(reviewed in QST) but I think they are out of business now. You might also
want to consider a moxon. Cebik wrote a nice article on making a moxon based
turnstile. I built one for 70 cm using PVC and like the QFH and eggbeater
(with reflector) , it works best on higher passes.
If you run out of patience, you might consider the Antennas.us QFH. It was
also reviewed positively in QST but I don?t own one.
And lastly, omnis are small and simple, but you really need a preamp to
avoid a terminal case of frustration. I use the ones from ARR with good
results.
Mike
------------------------------
Message: 3
Date: Mon, 23 Jan 2012 23:38:32 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: <normn3ykf@xxxx.xx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>, "William
Leijenaar" <pe1rah@xxxxx.xxx>
Subject: [amsat-bb] Re: Quadrifilar Helix antenna question
Message-ID: <001001ccda1f$bd82a980$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi Norm, N3YFK
Are you sure that your Antenna Analyzer Times T-100 is reading a correct
VSWR and R+/-jX impedance at 435 MHz ?
My MFJ-269 connected to a professional 50 ohm termination goog up to
18 GHz reads VSWR = 1.2 :1 but unfortunately the MFJ-269 do not read
R+/-jX impedance above 144 MHz
Do not forget that to get RHCP the helix must be winded lefthand and on
reverse to get LHCP the helix must be winded righthand.
In addition,depending on how you connect the four terminals of the loops
into the infinite balun you can get or End-Fire radiation or Back-Fire
Radiation.
I am interested on your experiments using your data to put it into the Smith
Chart and check
BTW on 70 cm using half-turn quadrifilar (two half-turn bifilar loops).
with dimensions that yield the correct phase relationship with a loop wire
diameter of 0.0088 wavelenght as follows and suggested by Walter
Maxell W2BU
and using:
Smaller loop:
D = 0.156 wavelenght
lenP? = 0.238 wavelenght
Perimeter= 1.016 wavelenght
Larger loop:
D = 0.173 wavelenght
lenP? = 0.260 wavelenght
Perimeter = 1.120 wavelenght
I got a return loss of -20 dB about a VSWR of 1.22 : 1 at 435 MHz as
measured on my HP8555A Spectrum Analyzer usind a well calibrated
HP11692D directional coupler.
73" de
i8CVS Domenico
----- Original Message -----
From: <normn3ykf@xxxx.xx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>; "i8cvs" <domenico.i8cvs@xxx.xx>;
"William Leijenaar" <pe1rah@xxxxx.xxx>
Sent: Monday, January 23, 2012 3:03 AM
Subject: Re: [amsat-bb] Re: Quadrifilar Helix antenna question
> Gentelmen:
> Thank you for your input. I've measured 2.4:1 at it's intended design
frequency, using a half wave stub.
> The antenna is essentially two loops (one capacitive and one inductive) in
parallel, giving an intended 50 Ohm resistive impedance at resonance. I'm
measuring 25 Ohms and a bit inductive. Do have more data if anyone is
interested. (smith chart, return loss)
> Tomorrow I'll build both versions, lhcp and rhcp. Tonight's live demo on
so50 shows promise, though I'll need two and have to switch polarity.
> 73 de Norm n3ykf
------------------------------
Message: 4
Date: Mon, 23 Jan 2012 15:28:43 -0800
From: Dave Guimont <dguimon1@xxx.xx.xxx>
To: "Mike Ryan" <mryan301@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Quadrifilar Helix antenna question
Message-ID: <94.D5.20593.C2DED1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="iso-8859-1"; format=flowed
Mike,
Go to:
http://tinyurl.com/wb6lloOscar
or if you wish call me at 619 275 1495 before
1800 pacific....I'm in San Diego...
Try my QFH...Many others have built them (years
ago!!), and found them successful...BUT at 435
measure the filars +-1/64, and be careful with
solder joints...and use teflon for the coaxial
filar.....and I guess obviously, "N"
connectors......the connector is the most expensive part of the antenna.
I have a friend that lives on a sailboat and
bought some expensive commercial antenna, and the
one he built from my dimensions outperforms it....
>QFH are a bear to build, especially on 70 cm
>unless you???re very , very skilled. I tried 3
>times and failed 3 times. Finally gave up and
>went with a standard turnstyle. Still critical
>tolerances but much easier to make and works
>lower on the horizon than the QFH. QHtenna used
>to sell turnstiles (reviewed in QST) but I think
>they are out of business now. You might also
>want to consider a moxon. Cebik wrote a nice
>article on making a moxon based turnstile. I
>built one for 70 cm using PVC and like the QFH
>and eggbeater (with reflector) , it works best
>on higher passes. If you run out of patience,
>you might consider the Antennas.us QFH. It was
>also reviewed positively in QST but I don???t
>own one. And lastly, omnis are small and simple,
>but you really need a preamp to avoid a terminal
>case of frustration. I use the ones from ARR
>with good results. Mike
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed
>are those of the author. Not an AMSAT-NA member?
>Join now to support the amateur satellite
>program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 5
Date: Mon, 23 Jan 2012 19:29:23 -0400
From: Bob Herrell <bob72601@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HI4/AJ5C
Message-ID:
<CAMQtZ2Tb8mUMeAAxWrKA0uXAKZMffv2=m8iDi2U79KFTW9oEug@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi all,
Looks like I have run the gamut of all the usual suspects as they say. Is
there anyone else that needs a contact with me on AO-27? Please email me
direct at aj5c<at>amsat.org and let me know. I will be operational until
Feb 8th. Most contacts now are duplicates.. Remember, QSL cards will be
sent out when I get back to all that made a good contact with me. NO SASE
NEEDED. Will also upload to LoTW and Eqsl.
73,
Bob
HI4/AJ5C
------------------------------
Message: 6
Date: Tue, 24 Jan 2012 01:06:51 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Some Key Players In Private Spaceflight
Message-ID:
<CAP7QzkP9zj9=NbSb13dDQq6oRnHwDkZ0eW-LzeM5926eztpRjg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://reason.com/archives/2012/01/23/rocket-men
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 7
Date: Mon, 23 Jan 2012 18:32:44 -0800
From: Dave Guimont <dguimon1@xxx.xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] m9 class solar flare
Message-ID: <A3.5B.25990.C481E1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
My garage door malfunctioned when I tried to activate it for the
first time since the m9 flare.
It is programmed to limit by a series of button presses on the remote
control to set its limits, and the code changes with each press to
activate over a billion new codes...It is a Liftmaster Professional..
Peter, Dom, Franklin, or anyone, am I way off base by making the
assumption that the charged particles from the flare could caused the
malfunction??
Or has one of them hit one of my 90 year old brain cells???
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 8
Date: Mon, 23 Jan 2012 22:04:26 -0500
From: "Mike Ryan" <mryan301@xxxxxxx.xxx>
To: "Dave Guimont" <dguimon1@xxx.xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Quadrifilar Helix antenna question
Message-ID: <D717872BF80A4213B94C417F9144EAC0@xxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hello Dave,
if youre referring to the Quadfilarconstruct.zip file on the skydrive,
that?s actually the instructions I tried to follow. used the recommended
hardline and everything. Perhaps I missed something or am just too clumsy
in my construction.
Mike
From: Dave Guimont
Sent: Monday, January 23, 2012 6:28 PM
To: Mike Ryan
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Re: Quadrifilar Helix antenna question
Mike,
Go to:
http://tinyurl.com/wb6lloOscar
oll critical tolerances but much easier to make and
works lower on the horizon than the QFH. QHtenna used to sell turnstiles
(reviewed in QST) but I think they are out of business now. You might also
want to consider a moxon. Cebik wrote a nice article on making a moxon based
turnstile. I built one for 70 cm using PVC and like the QFH and eggbeater
(with reflector) , it works best on higher passes. If you run out of
patience, you might consider the Antennas.us QFH. It was also reviewed
positively in QST but I don???t own one. And lastly, omnis are small and
simple, but you really need a preamp to avoid a terminal case of
frustration. I use the ones from ARR with good results. Mike
_______________________________________________ Sent via AMSAT-BB@xxxxx.xxx.
Opinions expressed are those of the author. Not!
an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 9
Date: Mon, 23 Jan 2012 22:09:36 -0500
From: Joe Fitzgerald <jfitzgerald@xxxx.xxx.xxx>
Cc: "'AMSAT'" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: spaceweather.com
Message-ID: <4F1E20F0.5050509@xxxx.xxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 1/23/2012 2:52 PM, Andrew Glasbrenner wrote:
> I forgot to tell you! Don't cross the streams
Thank you for the warning Dr Spengler!
-Joe KM1P
------------------------------
Message: 10
Date: Mon, 23 Jan 2012 22:47:34 -0500
From: "Mark Lunday" <mlunday@xx.xx.xxx>
To: "'Joe Fitzgerald'" <jfitzgerald@xxxx.xxx.xxx>
Cc: 'AMSAT' <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: spaceweather.com
Message-ID: <000601ccda4a$e871a9e0$b954fda0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Uhm...what happens if we DO cross the streams?
-Mark, WD4ELG
------------------------------
Message: 11
Date: Mon, 23 Jan 2012 22:48:16 -0500
From: "Mark Lunday" <mlunday@xx.xx.xxx>
To: "'Dave Guimont'" <dguimon1@xxx.xx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: m9 class solar flare
Message-ID: <000701ccda4b$015ebc90$041c35b0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Guys, I don't think the particles arrive until Tue morning, right?
Mark, WD4ELG
------------------------------
Message: 12
Date: Mon, 23 Jan 2012 21:47:30 -0800
From: Dave Guimont <dguimon1@xxx.xx.xxx>
To: "Mark Lunday" <mlunday@xx.xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: m9 class solar flare
Message-ID: <18.44.25990.2F54E1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Mark,
No, the first particles arrived one hour later, and am not sure how
long the s
To: Roger <Rogerkola@xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: m9 class solar flare
Message-ID: <55.3E.15128.8964E1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Roger,
What in the name of ham radio is an HCWA????
Dave
>I'd seriously consider the cells...I'm having trouble with my 62
>year old ones lately...is there a HCWA around?
>
>Roger
>WA1KAT
>
>On 1/23/2012 9:32 PM, Dave Guimont wrote:
>>My garage door malfunctioned when I tried to activate it for the
>>first time since the m9 flare.
>>
>>It is programmed to limit by a series of button presses on the
>>remote control to set its limits, and the code changes with each
>>press to activate over a billion new codes...It is a Liftmaster
Professional..
>>
>>Peter, Dom, Franklin, or anyone, am I way off base by making the
>>assumption that the charged particles from the flare could caused the
>>malfunction??
>>
>>Or has one of them hit one of my 90 year old brain cells???
>>
>>
>>
>> 73, Dave, WB6LLO
>> dguimon1@xxx.xx.xxx
>>
>> Disagree: I learn....
>>
>> Pulling for P3E...
>>_______________________________________________
>>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 14
Date: Tue, 24 Jan 2012 11:24:06 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Electronics Weekly Printed Edition - FUNcube
satellite
Message-ID:
<1327404246.84962.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The article on the FUNcube satellite has now appeared in the printed
publication Electronics Weekly (Jan. 25-31).
For details of how to download a PDF of the article see
http://www.uk.amsat.org/4006
73 Trevor M5AKA
------------------------------
Message: 15
Date: Tue, 24 Jan 2012 19:20:57 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Article - "OSCAR-1 Launched 50 Years Ago"
Message-ID:
<1327432857.98969.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
>From ARRL site:
A new, highly informative article on how the world's first Amateur Radio
satellite, OSCAR-1, came to be designed, built and launched has been posted
to the ARRL's Space Communication web page (see the "Articles" section).
Written by Andreas Bilsing, DL2LUX, "OSCAR-1 Launched 50 Years Ago" was
first published in the Germxxx.xxx
Subject: [amsat-bb] HI4/AJ5C update for Jan 24th
Message-ID:
<CAMQtZ2THkTjJB-aFGuX-3eJKN4WyRtifgqdBmqOX2O3qP3d8iw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Good contacts AO-27 1839z pass de HI4/AJ5C: N8RO, N5ZNL, AA4QE, WB2OQQ,
N3YKF, and K8TL.
PLEASE, if you have already worked me at least once, please standby and
give others a chance. There is NO award for making the most contacts.
Still listening for the following that have requested a contact: AA5PK,
NX9G, AA5JG, N5NBJ, KI4OTG, WA4OVO and K3CLM.
73,
Bob - HI4/AJ5C
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 7, Issue 42
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