| |
CX2SA > SATDIG 15.04.10 17:32l 849 Lines 25078 Bytes #999 (0) @ WW
BID : AMSATBB5168
Read: GUEST
Subj: AMSAT-BB-digest V5 168
Path: IZ3LSV<IW0QNL<F4BWT<F1BBI<CX2SA
Sent: 100415/1627Z @:CX2SA.LAV.URY.SA #:53364 [Minas] FBB7.00e $:AMSATBB5168
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: AO-7 is not OK (Dee)
2. Re: Most Hams in Space at one time? (Trevor .)
3. amazing video of robot for ISS (Samudra Haque)
4. FW: Re: AO-7 is not OK (ps8rf Piraja)
5. AO7 heard few minutes ago. (PY5LF)
6. Re: FW: Re: AO-7 is not OK (Sebastian)
7. AO-7 "situation" (Bob- W7LRD)
8. Re: FW: Re: AO-7 is not OK (Andrew Glasbrenner)
9. Most hams in space at one time?? (edward kacura)
10. Settings to work HO-68 in FM (Francisco Jim?nez-Mart?n S?nchez)
11. SatPC32 (Roger Swickis)
12. Re: Most hams in space at one time?? (Larry Teran)
13. Re: SatPC32 (Mark L. Hammond)
14. Circular polarisation question (Phil)
15. Re: SatPC32 (Alan P. Biddle)
16. Re: Settings to work HO-68 in FM (Nader Omer)
17. Re: Circular polarisation question (i8cvs)
18. Hudson Valley Satcom Group Net Tonight On N2EYH-L April 15 At
8 PM (Cotejaune2@xxx.xxxx
19. Arecibo (Bob- W7LRD)
----------------------------------------------------------------------
Message: 1
Date: Wed, 14 Apr 2010 16:15:50 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-7 is not OK
To: "'Peter Portanova'" <roic@xxxxxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <F7105C284E844E6D97868D1483CD4CFE@xxxxxxxx>
Content-Type: text/plain; charset=us-ascii
Pete,
Come on now, we all treat her like a lady, don't we? Always a few, Pete,
that never listen to suggestions...Hope all is well and your weather site
looks great.
Hope you're planning a few hamfest this year for AMSAT. Been to quite a few
already and hopefully we keep spreading the words...
73,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Peter Portanova
Sent: Wednesday, April 14, 2010 2:21 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: AO-7 is not OK
Tim,
As usual, very informative information on "The Grand Land", AO-7! Tim you
remind me of only a few professional athletes who respect the game, know
it's history and play it "correctly". Well, AO-7 is like an aging athlete,
don't put to much pressure on her or ask her to do to much. I'm
disappointed in a few operators who don't understand or care what too much
power can do to a linear satellites passband, if this was HF everybody would
be doing it, thank you for teaching all of us Tim.
73's Pete
WB2OQQ
www.massapequanyweather.com
_______________________________________________
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
------------------------------
Message: 2
Date: Wed, 14 Apr 2010 21:07:31 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] Re: Most Hams in Space at one time?
To: amsat-bb@xxxxx.xxxx Alan VE4YZ <ve4yz@xxx.xxx>
Message-ID: <611627.20026.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I made the total 10 hams, see list at
Six radio hams fly to space station
http://www.southgatearc.org/news/april2010/six_hams_on_sts131.htm
73 Trevor M5AKA
--- On Tue, 13/4/10, Alan VE4YZ <ve4yz@xxx.xxx> wrote:
> From: Alan VE4YZ <ve4yz@xxx.xxx>
> Subject: [amsat-bb] Re: Most Hams in Space at one time?
> To: "'James French W8ISS'" <w8iss@xxxxx.xxx>, amsat-bb@xxxxx.xxx
> Date: Tuesday, 13 April, 2010, 17:09
> Okay, I have the crew list but could
> any of these folks have non U.S. call
> signs beyond the 9 American Licensed Amateurs?
>
> ISS Crew
>
> > Oleg Kotov
> > T.J. Creamer
> > Soichi Noguchi
> > Alexander Skvortsov
> > Tracy Caldwell Dyson
> > Mikhail Kornienko
>
> Visiting STS-131 Crew:
> Alan G. Poindexter
> James P. Dutton Jr.
> Clayton C. Anderson
> Rick Mastracchio
> Dorothy M. Metcalf-Lindenburger
> Stephanie D. Wilson
> Naoko Yamazaki
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx
> [mailto:amsat-bb-bounces@xxxxx.xxxx
> On
> Behalf Of James French W8ISS
> Sent: Tuesday, April 13, 2010 9:45 AM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Most Hams in Space at one time?
>
> Currently there are 9 licensed American Amateur Radio
> operators on the ISS
> currently going by the list that is at the ARISS site on
> RAC.org.
>
> Is this the most hams in space to date or has there been
> more before this
> shuttle-ISS mission?
>
> James W8ISS
>
>
> _______________________________________________
> 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
>
------------------------------
Message: 3
Date: Wed, 14 Apr 2010 17:56:00 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] amazing video of robot for ISS
To: Amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<x2ud8c724881004141456yda7183beh1bcb9491cfc8cd81@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I wonder if a robot operator would make a 2-way QSO from the ISS using a ham
radio transceiver? See the video... amazing development:
http://www.youtube.com/watch?v=lY-SJyS18lA&feature=player_embedded
http://news.cnet.com/8301-17912_3-20002479-72.html
73 de N3RDX & S21X
------------------------------
Message: 4
Date: Wed, 14 Apr 2010 19:43:37 -0300
From: ps8rf Piraja <ps8rf@xxxxxxx.xxx>
Subject: [amsat-bb] FW: Re: AO-7 is not OK
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT121-W588E566894D3C2FF40A47E0100@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello friends,
Some friends wrote that the batteries of the AO-7 will not work. However
when analyzing the data made available by Mike in your web site I saw that
the results of telemetry for the voltage of the batteries and its load are
different in each decoding ...
I am convinced that the AO-7 is not in Mode C and would make an appeal to
all users of the "Grand Old Girl" using only QRP until your ready
reestablishment.
Thank you all for answers and guidance.
73'
Piraja, PS8RF
" Nobody is born knowing "
The Amateur Radio is supportive and helpful in any circumstance.
> From: jari.koivurinne@xxxx.xxx
> To: mail@xxxxxxxxxxxxxx.xxx ps8rf@xxxxxxx.xxxx amsat-bb@xxxxx.xxx
> Subject: RE: [amsat-bb] Re: AO-7 is not OK
> Date: Wed, 14 Apr 2010 17:56:40 +0000
>
> >
> >
> > Hi Piraja,
> >
> > Yes, I made similar observations. If the CW is active on 70cm you can hear
> > sometimes a very strong deviation in frequency.
> > The CW beacon partly not decodable. I agree with you it could be an effect
> > by low batteries or due heavy usage.
> > See some graphs here: http://www.dk3wn.info/p/?cat=21
> >
> > 73, Mike
> > DK3WN
> >
>
> Hi gang!
>
> There is no battery left in AO-7. All the current is generated by solar
> panels and the only "power buffer" is the capacitors in the regulator board.
> This may cause the voltage drop that also affects to output power and
> shifts oscillators. The solar panels are quite old too...
>
> 73,
> Jari oh3uw
>
>
>
>
_________________________________________________________________
Mude seu visual no Messenger e divirta-se com seus amigos online. Clique e
veja como
http://ilm.windowslive.com.br/?ocid=ILM:ILM:Hotmail:Tagline:1x1:Tagline
------------------------------
Message: 5
Date: Wed, 14 Apr 2010 20:05:24 -0300
From: "PY5LF" <py5lf@xxxxxxxxxxxxx.xxx.xx>
Subject: [amsat-bb] AO7 heard few minutes ago.
To: <amsat-bb@xxxxx.xxx>
Cc: sat-fm@xxxxxxxxxxx.xxx.xx
Message-ID: <000601cadc26$f7503fe0$e5f0bfa0$@xxx.xx>
Content-Type: text/plain; charset="us-ascii"
Hello all
Signal heard from AO7 few minutes ago ;
http://www.youtube.com/watch?v=SAjsrSmmmiU
73
PY5LF
LUCIANO FABRICIO
CURITIBA-PR-BRAZIL
GG54JM
<http://www.qrz.com/db/py5lf> http://www.qrz.com/db/py5lf
<http://www.falautomation.com.br/> www.falautomation.com.br
------------------------------
Message: 6
Date: Wed, 14 Apr 2010 20:27:56 -0400
From: Sebastian <w4as@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: FW: Re: AO-7 is not OK
To: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <E03F238C-7418-4221-9D3E-587D8F269C5A@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
AO-7 is definitely having problems. On the last pass at 00:00 4/15/2010, I
worked a few stations. The bird was very busy, lots of signals.
My downlink was very strong, above normal, even after lowering my power down
almost all the way on my 910H. I heard heavy distortion on my downlink.
This was a very high pass for me, about 60 degrees.
Leo, W7JPI also confirmed the distortion problem (not just on my signal).
He mentioned that had been happening all day.
I heard a couple of stations using CW, which also sounded pretty bad.
Signals were up and down. Sometimes very strong, sometimes they seemed to
disappear.
Once the bird was out of eclipse, the signals were almost normal, but not
for the entire pass. I also worked W7LRD for a few seconds at 5 degrees.
73 de W4AS
On Apr 14, 2010, at 6:43 PM, ps8rf Piraja wrote:
> I am convinced that the AO-7 is not in Mode C and would make an appeal to
all users of the "Grand Old Girl" using only QRP until your ready
reestablishment.
>
> Thank you all for answers and guidance.
>
> 73'
>
> Piraja, PS8RF
------------------------------
Message: 7
Date: Thu, 15 Apr 2010 00:32:21 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] AO-7 "situation"
To: amsat-bb@xxxxx.xxx
Message-ID:
<753381413.6052271271291541727.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
Hello
Just got off AO-7, it really sounds not too good.? Weak and distorted
audio.? Like not enough voltage from the 35 year old solar cells.? Heard
eveything from response to a CME event to being in mode C to being hit by
whatever.? The audio distortion does not depend on the uplink power, it
sounds distorted weather I ran very minimum power or more.? I know we are
simply "blessed" to have this old bucket of bolts for our enjoyment.?
Perhaps some our experts on the bb can shed some of their expertise on
what's going on with this old bucket.
73 Bob W7LRD
------------------------------
Message: 8
Date: Wed, 14 Apr 2010 21:44:40 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: FW: Re: AO-7 is not OK
Cc: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <4BC66F88.9060205@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Once the bird was out of eclipse, the signals were almost normal, but not
for the entire pass. I also worked W7LRD for a few seconds at 5 degrees.
>
> 73 de W4AS
>
>
AO-7 is in sunlight 24/7 at the moment. If it was in eclipse you would
not hear anything at all. It is however riding the terminator for a good
portion of the orbit. I need to run some predictions and see when/if it
returns to eclipses this summer.
It's likely that the orientation is just poor right now, and not much
power is being generated by the panels to run the transponder. It would
be interesting to see if when signals are poor on the Mode B
transponder, is the 435 beacon on?
73, Drew KO4MA
AMSAT-NA VP Operations
------------------------------
Message: 9
Date: Wed, 14 Apr 2010 12:42:19 -0700 (PDT)
From: edward kacura <ekacura@xxxxx.xxx>
Subject: [amsat-bb] Most hams in space at one time??
To: amsat-bb@xxxxx.xxx
Message-ID: <423488.95774.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
I know this sounds negative, but with all these hams in space, why isn't
anyone operating???
?
Why can't I and all the rest of us earth bound hams contact the ISS with our
handhelds and Arrow antennas????
?
What good is it , to have all these hams up there, and not a one,?can?make
contact with us poor souls on earth???
?
????????????????????????????????????????????? 73 de Ed N7EDK ???????????
------------------------------
Message: 10
Date: Wed, 14 Apr 2010 22:31:45 +0200
From: Francisco Jim?nez-Mart?n S?nchez <franciscojms@xxxxx.xx>
Subject: [amsat-bb] Settings to work HO-68 in FM
To: <amsat-bb@xxxxx.xxx>
Message-ID: <001401cadc11$804b1740$80e145c0$@xx>
Content-Type: text/plain; charset="iso-8859-1"
Hello to all the people in the list,
I would like to know if you use any special setting to work the HO-68 sat in
FM, because I have tried for to two days to enter in the satellite with no
success. I have an icom IC-910H, with the pl tone of 67 in the uplink but
there is no way to enter in the sat. I have tested to increase the power or
decrease and tried to follow the sat the best way possible with my yaesu
g-5500 and my X-Quad wimo antennas with no luck. Do you have any
recommendation?
Thanks in advance for your replies.
Kr,
Fran EA1JM
------------------------------
Message: 11
Date: Wed, 14 Apr 2010 23:38:39 -0700
From: Roger Swickis <rswickis@xxxxx.xxx>
Subject: [amsat-bb] SatPC32
To: amsat-bb@xxxxx.xxx
Message-ID: <521EFF3D-45BC-4192-A3C1-EFA55BE9E730@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Dear Folks,
I am attempting to get myself back on the satellites and am having some
problems with SatPC32.
Although WinAOS gives me accurate satellite position data, SatPC32 does not.
Furthermore satellite AOS/LOS data is different between the two programs,
sometimes by a half an hour.
I have checked all the settings and have tried updating the Keps but can't
seem to get the program to display accurate data.
Has anyone had this problem or does anyone know if there way around this
other than re-installing SatPC32? (I'd rather not have to input all the
settings again if I don't have to.)
Thanks
Roger VA7MG
------------------------------
Message: 12
Date: Thu, 15 Apr 2010 00:30:03 -0700
From: Larry Teran <ki6yaa@xxxxx.xxx>
Subject: [amsat-bb] Re: Most hams in space at one time??
To: amsat-bb@xxxxx.xxx
Message-ID:
<o2t91dafd721004150030x201c30ccl50278a30c7142484@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'm with you Ed there are a lot of new satellite operators including my
self, that are willing to contact the ISS, I give them I try every once in a
while since I get my satellite station , and no success.
On Wed, Apr 14, 2010 at 12:42 PM, edward kacura <ekacura@xxxxx.xxx> wrote:
> I know this sounds negative, but with all these hams in space, why isn't
> anyone operating???
>
> Why can't I and all the rest of us earth bound hams contact the ISS with
> our handhelds and Arrow antennas????
>
> What good is it , to have all these hams up there, and not a one, can make
> contact with us poor souls on earth???
>
> ???????????????????????????????????????????? 73 de Ed N7EDK ???????????
>
>
>
> _______________________________________________
> 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
>
------------------------------
Message: 13
Date: Thu, 15 Apr 2010 07:13:27 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: SatPC32
To: Roger Swickis <rswickis@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <5nDR1e00F1e3qRF05nDdKU@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Roger,
Some things to remember and then check: nearly each program in SatPC32
requires you to enter your lat/long (or grid square and it will calculate
lat/long) and desired time zone. Also, be sure that each program is
referring to the same Keplarian data (also in the setup).
So--when I hear that two different programs are giving different results---I
suspect that the programs are configured differently and/or using different
Keplarian data files. Give that a good close look first before
reinstalling...
73,
Mark N8MH
At 11:38 PM 4/14/2010 -0700, Roger Swickis wrote:
>Dear Folks,
>
>I am attempting to get myself back on the satellites and am having some
problems with SatPC32.
>
>Although WinAOS gives me accurate satellite position data, SatPC32 does
not. Furthermore satellite AOS/LOS data is different between the two
programs, sometimes by a half an hour.
>
>I have checked all the settings and have tried updating the Keps but can't
seem to get the program to display accurate data.
>
>Has anyone had this problem or does anyone know if there way around this
other than re-installing SatPC32? (I'd rather not have to input all the
settings again if I don't have to.)
>
>Thanks
>
>Roger VA7MG
>
>
>
>_______________________________________________
>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
Mark L. Hammond [N8MH]
------------------------------
Message: 14
Date: Thu, 15 Apr 2010 21:19:06 +1000
From: Phil <phillor@xxxxxxx.xxx>
Subject: [amsat-bb] Circular polarisation question
To: amsat-bb@xxxxx.xxx
Message-ID: <201004152119.06774.phillor@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Thank you for reading this.
Ten years ago I built a pair of circular polarised aerials primarily for
satellite use. The UHF aerial has 12 elements in each plane while the VHF
aerial has 6 elements in each plane. My UHF received signal strength often
seems to be below that of other stations and so I'm rethinking how I have
set up these aerials. The received signal strength via VO-52 is S7 at the
best, without a pre-amplifier, and so I'm happy with that. The UHF aerial is
where the problem is even thought they are set up in the same way.
Both aerials are mounted in an X orientation. One set of elements is a
quarter wave ahead of the other set. Because of the X mounting I cannot
tell if the vertical set is ahead of the horizontal set or not. Each aerial is
fed via a power splitter via equal length cables.
My question is; does this sound like a correctly set up right hand polarised
aerial? Originally I thought it was now I'm not sure.
--
Regards,
Phil
------------------------------
Message: 15
Date: Thu, 15 Apr 2010 06:38:44 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: SatPC32
To: "'Roger Swickis'" <rswickis@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <CD9B73C02EFF4B30ABB5A15B0CE86128@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Roger,
As Mark said, it is probably either a QTH or a KEPS issue. Most likely QTH,
since by default they look at the same keps. I keep ITrack around to break
the tie whenever there is a discrepancy with other programs. That tells me
where to look for the glitch. While not as detailed, the real time tracking
feature on the AMSAT-NA web site can provide some information.
Good luck,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Roger Swickis
Sent: Thursday, April 15, 2010 1:39 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] SatPC32
Dear Folks,
I am attempting to get myself back on the satellites and am having some
problems with SatPC32.
Although WinAOS gives me accurate satellite position data, SatPC32 does not.
Furthermore satellite AOS/LOS data is different between the two programs,
sometimes by a half an hour.
I have checked all the settings and have tried updating the Keps but can't
seem to get the program to display accurate data.
Has anyone had this problem or does anyone know if there way around this
other than re-installing SatPC32? (I'd rather not have to input all the
settings again if I don't have to.)
Thanks
Roger VA7MG
_______________________________________________
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
------------------------------
Message: 16
Date: Thu, 15 Apr 2010 06:24:08 -0700 (PDT)
From: Nader Omer <st2nh@xxxxx.xxx>
Subject: [amsat-bb] Re: Settings to work HO-68 in FM
To: amsat bb bb <amsat-bb@xxxxx.xxx>
Message-ID: <72569.7393.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi Fran EA1JM and All
?
Many things can be the cause
1-Check up your receiving setup ! listen to beacon before you? transmit? .
2- some time the sat not changed to ?FM mode (happened few time ) instead of
the schedule stats so.
3- check the beacon to see which mode is on.
4-AFC in downlink shift the frequency so fast ,so deactivate it until you
hook with
strong down link signal.
5-Never Try to work FM satellite in IC-910 sat-mode .
IMHO IC-910 sat mode is perfect only for Xponder satellite.
6- check volume level! and check if the tone on the VHF and not on
UHF.(common mistake to mix uplink tone with downlink tone)
7-Check Main and Sub External speaker setting combination
Hope this help!
73 de? Nader
------------------------------
Message: 17
Date: Thu, 15 Apr 2010 16:21:34 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Circular polarisation question
To: "Phil" <phillor@xxxxxxx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <000101cadca7$47a930c0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Phil" <phillor@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Thursday, April 15, 2010 1:19 PM
Subject: [amsat-bb] Circular polarisation question
> Thank you for reading this.
>
> Ten years ago I built a pair of circular polarised aerials primarily for
> satellite use. The UHF aerial has 12 elements in each plane while the VHF
> aerial has 6 elements in each plane. My UHF received signal strength often
> seems to be below that of other stations and so I'm rethinking how I have
> set up these aerials. The received signal strength via VO-52 is S7 at the
> best, without a pre-amplifier, and so I'm happy with that. The UHF aerial
> is where the problem is even thought they are set up in the same way.
>
> Both aerials are mounted in an X orientation. One set of elements is a
> quarter wave ahead of the other set. Because of the X mounting I cannot
> tell if the vertical set is ahead of the horizontal set or not. Each
> aerial is fed via a power splitter via equal length cables.
>
> My question is; does this sound like a correctly set up right hand
> polarised aerial? Originally I thought it was now I'm not sure.
>
> --
> Regards,
> Phil
>
Hi Phil
Since one set of elements is a quarter wave ahead of the other and each
aerial is fed via a power splitter via equal lenght of coax cable then your
antenna is circularly polarized.
Depending to which side of each dipole you have connected the inner
conductor and the braid of the coax cable the polarization can be RHCP
or LHCP
If you remember how the inner conductors and the braid of coax cables are
connected the the rear dipole and to the front dipole it is possible to
determine if the polarization is RHCP or LHCP
By the way for general information if you add a 1/2 electrical waveleght of
coax cable to the fed line suppliyng the front dipole than the sense of
polarization reverses from RHCP to LHCP or vice versa.
In a separate email I have sent to you a drawing showing how both linear
polarized fields components of your antennas adds to generate a resultant
circularly polarized wave.
Since the drawing is made using two crossed driving elements one vertical
and the other horizontal you only must ideally rotate the drawing right hend
or left hend by 45 degrees and nothing changes in your reasoning.
By the way your antenna is circularly polarized for sure but without to make
the above analisys it is impossible to say if RHCP or LHCP
Have fun
73" de
i8CVS Domenico
------------------------------
Message: 18
Date: Thu, 15 Apr 2010 11:57:51 EDT
From: Cotejaune2@xxx.xxx
Subject: [amsat-bb] Hudson Valley Satcom Group Net Tonight On N2EYH-L
April 15 At 8 PM
To: amsat-bb@xxxxx.xxx
Message-ID: <5bb6f.238f6f4.38f8917f@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Join us tonight at 8PM for net number 91 April 15. Hopefully Echolink will
be activated for the net. Hope to hear you there.
73
Gary WA2AQH
------------------------------
Message: 19
Date: Thu, 15 Apr 2010 16:23:23 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Arecibo
To: amsat-bb@xxxxx.xxx
Message-ID:
<532895323.6286881271348603370.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxxx
x.xxx>
Content-Type: text/plain; charset=utf-8
Hello
Should I be so lucky as to connect with Arecib o this weekend, what is the
proper protocol for a QSO?
73 Bob W7LRD
Seattle
------------------------------
_______________________________________________
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 5, Issue 168
****************************************
Read previous mail | Read next mail
| |
