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CX2SA > SATDIG 17.06.19 22:23l 974 Lines 31959 Bytes #999 (0) @ WW
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Sent: 190617/2016Z @:CX2SA.SAL.URY.SOAM #:8218 [Salto] FBB7.00e $:AMSATBB14235
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Falconsat-3 upload problem (Mark L. Hammond)
2. HS10KING on QO-100 (Tanan Rangseeprom)
3. Upcoming ARISS Contact Schedule as of 2019-06-17 16:30 UTC
(aj9n@???.????
4. M2 Leopack 2Meter swr (Rafael Pena)
5. Re: Fixed elevation - how many elements? (Martin Cooper)
6. Quads on the satellites (John Geiger)
7. Re: M2 Leopack 2Meter swr (Mark L. Hammond)
8. Re: Fixed elevation - how many elements? (Juan Carlos Reig)
9. Re: Quads on the satellites (Ron VE8RT)
----------------------------------------------------------------------
Message: 1
Date: Mon, 17 Jun 2019 10:52:53 -0400
From: "Mark L. Hammond" <marklhammond@?????.???>
To: Hans BX2ABT <hans.bx2abt@???.?????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Falconsat-3 upload problem
Message-ID:
<CAPRXzyrhaFW9j5UW=ZKfuRvSiOdSSQ3RrzMVNK8P02nspsRS=w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hello Hans, I have not been working FS-3 recently, since the IC-9700 will
not do 9600 packet [iCom, please fix!!] :( So I cannot comment on recent
uploads. However, to add to Bob's thoughts--are you running full duplex?
It's critical. Also, is your transmit signal desensitizing your receive
signal? That is important, too.
In the next week or so I will change radios at my station so I can again
use FS-3. I'll be better able to share current experiences with you.
73,
Mark N8MH
On Mon, Jun 17, 2019 at 9:19 AM Hans BX2ABT via AMSAT-BB <amsat-bb@?????.???>
wrote:
> I'm not behind my shack computer right now, but I know that PSGS and
> Direwolf each have a TX delay. Are you referring to those maybe being
> too long? If so, then why are all other commands (DL and directory
> listings) giving me no problem?
>
> 73 de Hans
>
> BX2ABT
>
>
> On 06/17/2019 08:53 PM, Robert Bruninga wrote:
> > I am no expert. But remember that your RF and all processing has to
> > be full duplex. The turn arround for packets in the satellite is
> > instantaneous.
> > with no TXD delays. Bob
> >
> >
> > On Mon, Jun 17, 2019 at 2:24 AM Hans BX2ABT via AMSAT-BB
> > <amsat-bb@?????.??? <mailto:amsat-bb@?????.???>> wrote:
> >
> > Up til now I have been successful in getting PacSatGroundStation
> > (PSGS)
> > to work on receive. You can go here if you want to see my setup:
> > http://bx2abt.com/main/Falconsat-3 . I can hit FalconSat-3 with a
> > directory request or file download request and get an immediate
> > response
> > and consequent downloads. Uploading is a different story, however. I
> > have been able to get some messages uploaded, but it was more by
> > chance.
> > Right now if I want to upload I seem to get into a loop where PSGS
> > keeps
> > on sending out the same frame (I presume), then disconnects, after
> > which
> > the whole cycle starts over again.
> >
> > From the PSGS debugging info you can see that I am successful in
> > logging into PFS3-12. My file gets a designated ID (1f14 in this
> > case)
> > and is ready to be received. Then it uploads what I presume is one
> > frame
> > (you can see this in Direwolf where the same chunk of data is send
> > over
> > and over again) after which possibly the reason why things don't
> > work:
> > "ER_BODY_CHECK received while uploading:
> > /home/hans/PacSatGroundData/FalconSat-3/BX2ABT17.txt.out". The only
> > mention of ER_BODY_CHECK I can find on the internet is that it is
> > sent
> > when the checksum on the file body fails. After that the whole
> > sequence
> > starts again, so the message never gets uploaded and out of the
> queue.
> >
> > Does this problem lie with FalconSat-3, Direwolf or PGSG, or
> > somewhere
> > else? Where is the checksum being made? This is my first forray into
> > packet radio/PacSat, so I'm not an expert (yet). I don't want to make
> > any (un)educated guesses, thus any help or hints are appreciated.
> > Cheers,
> >
> > Hans
> > BX2ABT
> >
> >
> >
> > This is the output (with debugging turned on) of PSGS:
> >
> > --------BEGIN-------
> > Open ABCD:
> > Ready to upload file: BX2ABT17.txt.out
> > B: 209908947.
> > U>>
> > DEBUG 3: Open: Adding UP LINK Event: UL_CONNECT
> > PB: Empty..
> > I>>From:PFS3-12 to BX2ABT Ctrl: 0 Type: I Cmd PF: 0 NR: 0 NS: 0
> > 5 2 cc
> > a7 fb 5c 4> SUCCESSFUL LOGIN to PFS3-12 by BX2ABT
> > DEBUG 3: Open: Adding UP LINK Event: From:PFS3-12 to BX2ABT Ctrl: 0
> > Type: I Cmd PF: 0 NR: 0 NS: 0 5 2 cc a7 fb 5c 4> SUCCESSFUL
> > LOGIN to
> > PFS3-12 by BX2ABT
> > DEBUG 3: Cmd Ok: Adding UP LINK Event: UL_REQUEST_UPLOAD
> > DEBUG 3: Cmd Ok: UL_CMD: From:BX2ABT to PFS3-12 Ctrl: 0 Type: I
> > Cmd PF:
> > 0 NR: 0 NS: 0 8 3 14 1f 0 0 31 3 0 0 UL CMD: UPLOAD_CMD File: 1f14
> > Size: 331
> > S>>
> > I>>From:PFS3-12 to BX2ABT Ctrl: 22 Type: I Cmd PF: 0 NR: 1 NS: 1
> > 8 4
> > 14 1f 0 0 31 3 0 0> Ready to receive file: 1f14 from BX2ABT at
> > off: 817
> > DEBUG 3: Waiting: Adding UP LINK Event: From:PFS3-12 to BX2ABT
> > Ctrl: 22
> > Type: I Cmd PF: 0 NR: 1 NS: 1 8 4 14 1f 0 0 31 3 0 0> Ready to
> > receive
> > file: 1f14 from BX2ABT at off: 817
> > DEBUG 3: Waiting: UL_GO_RESP: From:PFS3-12 to BX2ABT Ctrl: 22
> > Type: I
> > Cmd PF: 0 NR: 1 NS: 1 8 4 14 1f 0 0 31 3 0 0> Ready to receive
> > file:
> > 1f14 from BX2ABT at off: 817
> > DEBUG 3: Waiting: GO FILE>From:PFS3-12 to BX2ABT Ctrl: 22 Type: I
> > Cmd
> > PF: 0 NR: 1 NS: 1 8 4 14 1f 0 0 31 3 0 0> Ready to receive file:
> > 1f14
> > from BX2ABT at off: 817
> > DEBUG 3: Data: Adding UP LINK Event: UL_DATA_END
> > DEBUG 3: Data: UL_DATA_END: UL_DATA_END
> > S>>
> > I>>From:PFS3-12 to BX2ABT Ctrl: 44 Type: I Cmd PF: 0 NR: 2 NS: 2
> > 1 7
> > 10> UL NAK 16: ER_BODY_CHECK
> > DEBUG 3: Data End: Adding UP LINK Event: From:PFS3-12 to BX2ABT
> > Ctrl: 44
> > Type: I Cmd PF: 0 NR: 2 NS: 2 1 7 10> UL NAK 16: ER_BODY_CHECK
> > DEBUG 3: Data End: UL_NAK_RESP: From:PFS3-12 to BX2ABT Ctrl: 44
> > Type: I
> > Cmd PF: 0 NR: 2 NS: 2 1 7 10> UL NAK 16: ER_BODY_CHECK
> > NAK: ER_BODY_CHECK received while uploading:
> > /home/hans/PacSatGroundData/FalconSat-3/BX2ABT17.txt.out
> >
> > TIME-1: PHT: uptime is 469/13:51:30. Time is Sat Jun 08 12:19:29
> > 2019.
> > U>>
> > DEBUG 3: Idle: Adding UP LINK Event: UL_DISCONNECTED
> > DEBUG 3: Idle: Adding UP LINK Event: Open ABCD:
> > Open ABCD:
> > B: 209908947.
> > PB: Empty..
> > ---------END-------
> >
> > This is what Direwolf's output is:
> >
> > --------BEGIN-------
> > PFS3-1 audio level = 68(+118/-110) [NONE] |||||||||
> > [0.4] PFS3-1>LSTAT:I P:0x13A8 o:0 l:31473 f:31529, d:1 st:4
> e:26<0x0d>
> > Unknown APRS Data Type Indicator "I", Ambulance
> > [0L] BX2ABT>PFS3-12:(SABM cmd, p=1)
> >
> > PFS3-12 audio level = 69(+115/-111) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(UA res, f=0)
> >
> > PFS3-12 audio level = 70(+119/-110) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(I cmd, n(s)=0, n(r)=0, p=0,
> > pid=0xf0)<0x05><0x02>^<0xa8><0xfb>\<0x04>
> > [0L] BX2ABT>PFS3-12:(I cmd, n(s)=16, n(r)=120, p=0,
> > pid=0x08)<0x08><0x03><0x14><0x1f><0x00><0x00>1<0x03><0x00><0x00>
> >
> > PFS3-12 audio level = 70(+121/-110) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(RR res, n(r)=1, f=0)
> >
> > PFS3-12 audio level = 70(+121/-109) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(I cmd, n(s)=17, n(r)=120, p=0,
> > pid=0x08)<0x04><0x14><0x1f><0x00><0x00><0xfe><0x00><0x00><0x00>
> > [0L] BX2ABT>PFS3-12:(I cmd, n(s)=1, n(r)=2, p=0,
> > pid=0xf0)<0xfe><0x00>
> > the internet server that you sent me a message on April 11, but
> > unfortunately I never was able to download it. It took a while to get
> > the transmitting part working, but now it does and I'm very
> > pleased to
> > be able to contact you via FS-3. Truly an amazin
> > [0L] BX2ABT>PFS3-12:(RR cmd, n(r)=2, p=1)
> >
> > PFS3-11 audio level = 65(+118/-109) [NONE] |||||||||
> > [0.4] PFS3-11>PBLIST:PB: Empty.<0x0d>
> > Unknown APRS Data Type Indicator "P", Original Balloon (think Ham b
> >
> > PFS3-12 audio level = 66(+117/-109) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(RR res, n(r)=1, f=1)
> > [0L] BX2ABT>PFS3-12:(I cmd, n(s)=33, n(r)=120, p=0,
> > pid=0x08)<0x08><0x03><0x00><0x00><0x00><0x00>1<0x03><0x00><0x00>
> >
> > PFS3-12 audio level = 74(+125/-111) [NONE] |||||||||
> > [0.4] PFS3-12>BX2ABT:(DISC cmd, p=1)
> > [0L] BX2ABT>PFS3-12:(UA res, f=1)
> > --------END-------
> >
> > _______________________________________________
> > Sent via AMSAT-BB@?????.??? <mailto:AMSAT-BB@?????.???>. 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@?????.???. 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
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 2
Date: Mon, 17 Jun 2019 22:31:02 +0700
From: Tanan Rangseeprom <nanrspm@?????.???>
To: amsat-bb@?????.???
Cc: "Hoz Ueda _JA0FKM\)" <hoz_ueda@??????.???>,
"chawalit@???????.??.??? <chawalit@???????.??.??>, Apiwat Jira
<apiwatjira26@?????.???>, Anan Paenthongkham <hs1gab@?????.???>,
jakkree hantongkom <hs1fvl@?????.???>
Subject: [amsat-bb] HS10KING on QO-100
Message-ID:
<CAMw-yOXQrVbsAN6h8M2Wv8eLE_3Jwu28TJD1FYqWp8-aTZyiRA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Dear AMSAT member,
To strengthen the relationship between Thai and Japanese amateur radio
operators representatives of the JAMSAT group of Japan have travelled to
Thailand to visit the satellite ground station HS0AJ and will operate from
the Ground Station of the Radio Amateur Society of Thailand under the
patronage of His Majesty the King (RAST).
On the occasion of the coronation of His Majesty King Vajiralongkorn
Bodindradebayavarangkun, HS10A (pronounced "Hotel Sierra-TEN-Alpha), as the
10th king to reign in the Chakri Dynasty, the National Broadcasting and
Telecommunications Commission (NBTC), Thailand's regulator, has authorized
the special callsign HS10KING (pronounced "Hotel Sierra-TEN-KING).
There will be an opportunity to communicate with HS10KING using the QO-100
amateur radio satellite and low earth orbit (LEO) satellites that windows
pass over Thailand by amateur radio stations which is similar to AMSAT
Germany's use of the special callsign DL50AMSAT using the QO-100 satellite.
RAST hence invites AMSAT amateur radio satellite operators to join in
contacting the HS10KING special event station from June 22, 2019 at 10.00
UTC (17.00 Thailand time) until June 23, 2019 at 10.00 UTC (17.00 Thailand
time) using SSB mode and DATV (333 - 250 KS) signals from the station
HS10KING.
Please be informed and let others know of this opportunity.
Sincerely and with respect, de HS1JAN
Tanan Rangseeprom
Project Manager of JAISAT-1
------------------------------
Message: 3
Date: Mon, 17 Jun 2019 16:38:25 +0000 (UTC)
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2019-06-17
16:30 UTC
Message-ID: <307517783.1960007.1560789505616@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Upcoming ARISS Contact Schedule as of 2019-06-17 16:30 UTC
Quick list of scheduled contacts and events:
GBPOU RM "Saransk Polytechnic College", Saransk Russia, direct via R4UAB
The ISS callsign is presently scheduled to be RS?ISS?
The scheduled astronaut is Oleg Konenenko
Contact is go for Sat 2019-06-15 10:39 UTC
?
King Island District High School, Currie, TAS, Australia, telebridge via
IK1SLD
The ISS callsign is presently scheduled to be OR4ISS
The scheduled astronaut is David St-Jacques KG5FYI
Contact is go for: Wed 2019-06-19 08:49:20 UTC 58 deg
?
Rowan Preparatory School, Claygate, United Kingdom, direct via GB4RPS
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Nick Hague KG5TMV
Contact is go for: Thu 2019-06-20 12:48:55 UTC 53 deg
Watch for live stream at https://live.ariss.org/
?
?
Note, all times?are approximate.? It is recommended that you do your own
orbital prediction?or start listening about 10 minutes before the listed
time.
All dates and?times listed follow International Standard ISO 8601 date and
time format?YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of?2019-06-17 16:30 UTC.? (***)
Here you will find a listing of all scheduled?school contacts, and
questions, other ISS related websites, IRLP and?Echolink websites, and
instructions for any contact that may be streamed?live.??
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
http://www.amsat.org/amsat/ariss/news/arissnews.txt
?
The successful school list has been updated as of 2019-06-16 17:00 UTC.
http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
?
?
The ARISS webpage is at http://www.ariss.org/??
Note that there are links to other ARISS websites from this site.
The main page for Applying to Host a Scheduled Contact may be found at
http://www.ariss.org/apply-to-host-an-ariss-contact.html??
ARISS Contact Applications (United States)
?
The ARISS webpage is at http://www.ariss.org/??
Note that there are links to other ARISS websites from this site.
******************************************************************************
******************************************************************************
****************
ARISS Contact Applications (Europe, Africa and the Middle East)
?
Schools and Youth organizations in Europe, Africa and the Middle East
interested in setting up an ARISS radio contact with an astronaut on board
the International Space Station are invited to submit an application from
September to October and from February to April.
Please refer to details and the application form at
www.ariss-eu.org/school-contacts.? Applications should be addressed by email
to:? school.selection.manager@????????.???
?
ARISS Contact Applications (Canada, Central and South America, Asia and
Australia and Russia)
?
Organizations outside the United States can apply for an ARISS contact by
filling out an application.? Please direct questions to the appropriate
regional representative listed below. If your country is not specifically
listed, send your questions to the nearest ARISS Region listed. If you are
unsure which address to use, please send your question to the ARISS-Canada
representative; they will forward your question to the appropriate
coordinator.
?
For the application, go to:? http://www.ariss.org/ariss-application.html.
ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to:
ve3tbd@?????.???
ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to:
ariss@???????.???? Japan Amateur Radio League (JARL) http://www.jarl.org/ ?
ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/?
?
?
******************************************************************************
ARISS is always glad to receive listener reports for the above contacts.?
ARISS thanks everyone in advance for their assistance.? Feel free to send
your reports to aj9n@?????.??? or aj9n@???.???.
?
Listen for the ISS on the downlink of 145.8? MHz.
?
******************************************************************************
*
?
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
?
******************************************************************************
*
Several?of you have sent me emails asking about the RAC ARISS website and
not being able?to get in.? That has now been changed to?
http://www.ariss.org/
Note that there are links to other ARISS websites from this?site.
****************************************************************************
Looking for something new to do?? How about receiving DATV from the ISS??
Please note that the HamTV system has been brought back to earth for
troubleshooting.? Please monitor ARISS-EU or ARISS-ON for the very latest
news on the troubleshooting efforts.?
?
If interested, then please go to the ARISS-EU website for complete details.?
Look for the buttons indicating Ham Video.????????????
http://www.ariss-eu.org/?
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to
provide some insight.? Contact Kerry at kbanke@?????????.???
The HamTV webpage:? https://www.amsat-on.be/hamtv-summary/
?
?
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:?
Satoshi 7M3TJZ with 135
Francesco IK?WGF with 132
Gaston ON4WF with 123
Sergey RV3DR with 117
****************************************************************************
The?webpages listed below were all reviewed for accuracy.? Out of date
webpages?were removed, and new ones have been added.? If there are additional
ARISS?websites I need to know about, please let me know.
Total number?of ARISS ISS to earth school events is 1317.
Each school counts as 1?event.
Total number of ARISS ISS to earth school contacts is 1260.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is?47.
A complete year by year breakdown of the contacts may be found in the
file.
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
Please?feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The?following US states and entities have never had an ARISS contact:
South Dakota, Wyoming, American?Samoa, Guam, Northern Marianas Islands, and
the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL?information may be found at:??
http://www.ariss.org/qsl-cards.html?
ISS callsigns:? DP?ISS, IR?ISS, NA1SS, OR4ISS,?RS?ISS
****************************************************************************
Frequency? chart for packet, voice, and crossband repeater modes showing
Doppler? correction? as of 2005-07-29 04:00 UTC
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction
.rtf
Check out the Zoho reports of the ARISS?contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 58 on orbit
Oleg Konenenko
David St-Jacques KG5FYI
Anne McClain
?
Exp. 59 on orbit
Christina Koch
Aleksey Ovchinin
Nick Hague KG5TMV
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
------------------------------
Message: 4
Date: Mon, 17 Jun 2019 17:03:00 +0000
From: Rafael Pena <pinoleronica@???????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: [amsat-bb] M2 Leopack 2Meter swr
Message-ID:
<BL0PR06MB4578EC129C1B3DBD015B7087C6EB0@?????????????.????????.????.???????.??
?>
Content-Type: text/plain; charset="iso-8859-1"
Recently, I had my roof done and had to remove the M2 Leopack from the mast
together with the G-5500 Az/El. I sat it on the roof floor next to my
house. Now that I place it back, the 2M SWR is way high off the sat or
regular 2m frequencies 440 is as expected.
It is not coax since I tested it with a short piece and analyzer with same
results. I had not check the coax stubs yet and thought to write hear
first. Any hints will be appreciated.
M2 website has a "Blog" which contains only info on Ohm meter testing.
Rafael / NN3RP
------------------------------
Message: 5
Date: Mon, 17 Jun 2019 10:16:47 -0700
From: Martin Cooper <kd6yam@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fixed elevation - how many elements?
Message-ID:
<CAGEtHiL_84+aRHb3gj47py3h5HKGWMxe-4PK1-+rz0BkBQiQCg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Thanks very much, everyone, for all of the feedback and suggestions.
Much appreciated!
Now to figure out how to adjust the DK7ZB designs slightly for
satellite frequencies...
Martin.
KD6YAM
On Sun, Jun 16, 2019 at 7:32 AM Martin Cooper <kd6yam@?????.???> wrote:
>
> I'm contemplating building a couple of yagis, possibly even crossed
> ones, and putting them up at fixed elevation (i.e. az-only rotator).
> What I'm unclear about is how many elements to consider.
>
> My location is really pretty dreadful for seeing sky. There's a big
> hill to the NE that restricts me to above 40 degrees in that
> direction. I'm in a single-storey house, with neighbouring two-storey
> houses to the NW, SW, and S. In between all that, there are other
> single-storey houses, and trees in most of the gaps between houses. I
> can't afford to put up a tower (and it could never get above the hill
> anyway), so I'm looking at not too much above my roofline.
>
> To at least get through the trees, I'd think more elements would be
> better. But more elements narrows the beam, and at fixed elevation,
> that, at some point, will restrict even further how much of the sky I
> can play with.
>
> I'm looking for thoughts on how many elements would be recommended,
> and how many would be too many, for a fixed elevation, both for VHF
> and UHF. Ultimately, I'd like to be able to get on the linears, so not
> limited to the FM sats. Any thoughts would be much appreciated.
>
> Thanks in advance.
>
> Martin.
> KD6YAM
------------------------------
Message: 6
Date: Mon, 17 Jun 2019 14:05:56 -0500
From: John Geiger <af5cc2@?????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: [amsat-bb] Quads on the satellites
Message-ID:
<CAHC1P29ytSrpQvL3-8oOWGRathGMCQ5Vsw8Pvwr6p+fpDhWmBg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Has anyone tried the Cubix dualband quad on the satellites? I am wondering
(hoping) that it might have a better elevation pattern than my Cushcraft
A270-10S dualband yagi does. On Mode B passes, the satellite has to get to
a 25 degree elevation or more before I really have a good chance at getting
into the FM satellites. It would be nice to have something that allowed
for better success at the lower elevations also.
73 John W5TD (ex AF5CC)
------------------------------
Message: 7
Date: Mon, 17 Jun 2019 15:06:59 -0400
From: "Mark L. Hammond" <marklhammond@?????.???>
To: Rafael Pena <pinoleronica@???????.???>
Cc: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] M2 Leopack 2Meter swr
Message-ID:
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Rafael,
While not the exact same antenna, I had an SWR problem on an M2 antenna (7
elements vertical yagi) once that drove me nuts until I figured out the
problem. This may help you (or others down the road...) The observation
was the SWR was high (sometimes it was intermittent, but mostly it was
high). The culprit? It was a poor electrical connection between the
driven element and the boom! There was "gunk" or corrosion of a type
under the aluminum "block" of the driven element that is screwed to the
main boom via the stainless steel screw. Using a scratchy Scotchbrite pad
on both the block and the main boom, I was able to clean it up and fix the
SWR issue.
It took me months to determine the cause--I replaced the coax from antenna
to preamp, the preamp itself, swapped coax feedlines; I opened up the
original driven element, just SURE there had to be a break in the internal
wire(s). Nope! I eventually bought another new antenna just like it to
swap out the driven element, and finally then did I see what was the
apparent cause.
It's a case of having to see it myself, to believe it...
Rafael, if I was you, I'd at least check the connection of both driven
elements to the boom---clean it up well, and see if that fixes it. If not,
no harm done...but this is a place that would NEVER have occurred to me
previously...
Please let us know what fixes your issue!
73,
On Mon, Jun 17, 2019 at 1:09 PM Rafael Pena via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Recently, I had my roof done and had to remove the M2 Leopack from the
> mast together with the G-5500 Az/El. I sat it on the roof floor next to
> my house. Now that I place it back, the 2M SWR is way high off the sat or
> regular 2m frequencies 440 is as expected.
>
> It is not coax since I tested it with a short piece and analyzer with same
> results. I had not check the coax stubs yet and thought to write hear
> first. Any hints will be appreciated.
>
> M2 website has a "Blog" which contains only info on Ohm meter testing.
>
> Rafael / NN3RP
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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.
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>
--
Mark L. Hammond [N8MH]
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Message: 8
Date: Mon, 17 Jun 2019 21:49:29 +0200
From: Juan Carlos Reig <ecoalfa5wa@?????.???>
To: Martin Cooper <kd6yam@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Fixed elevation - how many elements?
Message-ID: <e42711ee-a011-4a58-a784-04de94b10fff@?????.???>
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Why not an LFA from G0ksc?
I think is a good option
73's from EA5WA Juan Carlos
En 17 jun. 2019 19:21, en 19:21, Martin Cooper via AMSAT-BB
<amsat-bb@?????.???> escribi?:
>Thanks very much, everyone, for all of the feedback and suggestions.
>Much appreciated!
>
>Now to figure out how to adjust the DK7ZB designs slightly for
>satellite frequencies...
>
>Martin.
>KD6YAM
>
>On Sun, Jun 16, 2019 at 7:32 AM Martin Cooper <kd6yam@?????.???> wrote:
>>
>> I'm contemplating building a couple of yagis, possibly even crossed
>> ones, and putting them up at fixed elevation (i.e. az-only rotator).
>> What I'm unclear about is how many elements to consider.
>>
>> My location is really pretty dreadful for seeing sky. There's a big
>> hill to the NE that restricts me to above 40 degrees in that
>> direction. I'm in a single-storey house, with neighbouring two-storey
>> houses to the NW, SW, and S. In between all that, there are other
>> single-storey houses, and trees in most of the gaps between houses. I
>> can't afford to put up a tower (and it could never get above the hill
>> anyway), so I'm looking at not too much above my roofline.
>>
>> To at least get through the trees, I'd think more elements would be
>> better. But more elements narrows the beam, and at fixed elevation,
>> that, at some point, will restrict even further how much of the sky I
>> can play with.
>>
>> I'm looking for thoughts on how many elements would be recommended,
>> and how many would be too many, for a fixed elevation, both for VHF
>> and UHF. Ultimately, I'd like to be able to get on the linears, so
>not
>> limited to the FM sats. Any thoughts would be much appreciated.
>>
>> Thanks in advance.
>>
>> Martin.
>> KD6YAM
>_______________________________________________
>Sent via AMSAT-BB@?????.???. 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
------------------------------
Message: 9
Date: Mon, 17 Jun 2019 14:02:44 -0600
From: Ron VE8RT <ve8rt@?????.??>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Quads on the satellites
Message-ID: <20190617140244.0e2410237b5780fb609da637@?????.??>
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Hi John,
I use an eight element Cubex quad on the 2M side, fixed elevation
roughly 15 to 20 degrees, up 10M at tree top height (its the mid
arctic, thats a good sized tree here). The azimuth tracking is manual
(usually ahead or behind the satellite). For the most part I'm picking
up the FM satellites beacons between 3 and 1/2 degree from the horizon
just after updating the Keps and using Gpredict. The drop off as the
satellite rises above the antenna beam, but decreases in range, hasn't
been a problem. I can tell you from using the set up to bet a bearing
on a stuck mike on an APRS WX transmitter that the beamwidth is pretty
sharp, I can get the bearing to the stuck mike station consistently
(its happened a couple of times) to within +/- 5 degrees using the S
meter or better yet the scope display on WSJTX on MSK144.
On the 70cm side I'm using an old helix antenna I picked up used
over 20 years ago, so my antenna is NOT dual band.
As an aside, with the antenna, with or without a preamp on the FM
satellites I've had Q5 copy on a pair of stations that couldn't hear
well enough to make an exchange to complete the QSO.
I have not affiliation with Cubex or any other antenna company. On
my QSL I have a photo of my place with the antenna in the back and
everything in site covered in a couple of centimetres of hoar frost.
Ron VE8RT in DP22
On Mon, 17 Jun 2019 14:05:56 -0500
John Geiger via AMSAT-BB <amsat-bb@?????.???> wrote:
> Has anyone tried the Cubix dualband quad on the satellites? I am wondering
> (hoping) that it might have a better elevation pattern than my Cushcraft
> A270-10S dualband yagi does. On Mode B passes, the satellite has to get to
> a 25 degree elevation or more before I really have a good chance at getting
> into the FM satellites. It would be nice to have something that allowed
> for better success at the lower elevations also.
>
> 73 John W5TD (ex AF5CC)
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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
--
Ron VE8RT <ve8rt@?????.??>
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Sent via amsat-bb@?????.???.
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 member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 14, Issue 235
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