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CX2SA > SATDIG 01.01.20 18:01l 644 Lines 20835 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: When exactly is a non-conductive mast necessary? (John Kludt)
2. Re: SSTV on Linears (Scott)
3. Re: SSTV on Linears (Roy Dean)
4. Re: SSTV on Linears (Roy Dean)
5. A21EME Video (M5AKA)
6. Re: SSTV on Linears (Mark D. Johns)
7. SKN on the birds (Mike Herr)
8. AO-92 in L/v at 0140utc 1/1/2020 for 24 hrs (Mark L. Hammond)
9. Celebrate New Years with the L Band Boys (Ronald Parsons)
10. Satellite presentation in Sun City AZ (6 January 2020)
(Patrick STODDARD (WD9EWK/VA7EWK))
11. AMSAT @ Thunderbird Hamfest in Glendale AZ (11 January 2020)
(Patrick STODDARD (WD9EWK/VA7EWK))
12. Ground Station Calculator (Wendy and Terry Osborne)
13. New SatPC Version with 9700 (Richard Lawn)
14. Re: New SatPC Version with 9700 (Stefan Wagener)
15. Re: Ground Station Calculator (Zach Metzinger)
----------------------------------------------------------------------
Message: 1
Date: Tue, 31 Dec 2019 12:05:18 -0500
From: John Kludt <johnnykludt@?????.???>
To: Bill Booth <ve3nxk@?????.???>
Cc: Amsat BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID:
<CABsMmtQCGDc9M2HJ2Ce6pML+_1oqMpsnXR+LyYWqi2-MsGahjw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Cathryn,
I am going to bow out of this discussion. I thought you had asked a
question based on physics but that is clearly not where the discussion is
going. The current satellites are actually very forgiving. Like a friend
of mine likes to say, "If your SWR is less than 10:1 - call CQ!" There is
a long tradition in Amateur Radio of doing whatever works. Maybe not the
best electrical engineering effort, maybe not even close, but if it works,
what the heck.
Happy New Year and I hope to see you on the birds.
73,
John
On Tue, Dec 31, 2019 at 9:03 AM Bill Booth via AMSAT-BB <amsat-bb@?????.???>
wrote:
> On 2019-12-31 12:00 a.m., Andy via AMSAT-BB wrote:
> > I used a copper boom for many years.
> > The antennas were oriented in an "X" pattern.
>
> Same here. Run coax along boom too. Been like that since ???forever.
> Installed
> my Crushcraft pair like that when I purchased them in 80's and still
> working today.
>
> --
> Bill Booth VE3NXK
> Sundridge ON, Canada
> 79.23.37 W x 45.46.18 N
> FN05ns
>
> Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
>
> Organ and Tissue Donation - The Gift of Life
> Talk to your family. Your decision can make a difference.
> _______________________________________________
> 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: 2
Date: Tue, 31 Dec 2019 17:06:43 +0000
From: Scott <scott23192@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] SSTV on Linears
Message-ID:
<CAJCSnOb48Lb+UXTb3qxTz6YujyKvfhv69TUt2pAykoTcg1HvSQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Heard you but was caught off-guard... I assumed you would TX on FM, but it
seemed to be the normal USB downlink.
Won't be around for the upcoming CAS-4A pass, but have fun & good luck!
-Scott, K4KDR
=======================
On Tue, Dec 31, 2019 at 11:13 AM Roy Dean via AMSAT-BB <amsat-bb@?????.???>
wrote:
> >
> > I did some SSTV years ago via AO-40. Really fun. But with a LEO
> > satellite, you will need to be actively adjusting for Doppler shift in
> > real time, as SSTV is frequency sensitive. You might try some of the
> > faster modes, especially since a pass is over in just a few minutes. Greg
> > KO6TH
>
>
> I just did a dry run with my station, and think I'm ready to try an actual
> pass. I will be operating in "Robot36" mode on CAS-4B (17:00z) and CAS-4A
> (17:30z) this afternoon as first attempt. I plan on shooting for the
> lower portion of the 2m passband (going to target the lowest published
> downlink frequency). I will likely announce several times prior to first
> transmitting to fine tune. My test image is very simple black and white
> call/grid. If anybody hears it, please feel free to respond with an image
> (short notice, I know), or voice. If you don't hear me, then something
> came up to pull me away from my computer or I simply can't get in.
>
> --Roy
> K3RLD
>
------------------------------
Message: 3
Date: Tue, 31 Dec 2019 12:58:43 -0500
From: Roy Dean <royldean@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] SSTV on Linears
Message-ID:
<CADGPg2sZaFTJLk8SomzW_8YHTi-4xgB4356CEKzF025coJnkFA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
>
> Roy, Have you checked this out with the control ops? I don't know but are
> there
> any duty cycle issues to worry about? And given that a linear transponder
> has a finite power budget what does it do to the other users? Maybe not a
> big deal but I wonder if the sys ops for these birds have any words of
> wisdom for us before we all start cranking up MMSSTV and banging away. John
I have not. However I did just try it out and was monitoring the pass
band and did not see any adverse affect. In fact, there were QSO's going
on simultaneously that were very strong (stronger than my signal, for sure).
At one point, it did seem as though somebody may have been doing something
that was affecting the downlink (but it wasn't me as I wasn't Tx'ing at the
time) - as it was a very wide signal that sort of sounded like it could
have been SSTV splatter. Could have been local QRM, too. At the start of
the first pass I received a partial image from another operator that was
very nice (I just didn't pick up the signal until the image was
completing). I also decoded my downlink after the pass and one came in
very nicely and the other was recognizable but I think a frequency shift
caused a decode hiccup that introduced interesting patterns and colors. I
didn't get any "good" decodes from the second pass, but I'm wondering if I
can do some post processing of the recorded file to shift the audio
frequencies (they decode, but again stange colors and patterns - but can
still make out text on solid backgrounds).
I took some screen grabs of the passband during transmission, and it looks
pretty good. At one point I had my power down to "3" on my 706MKIIG,
which should be about 7 watts out of the transceiver (through 50 ft of
RG-8X, an auto switching LNA, MFJ 916b, and another 6ft of LMR-240UF) and I
was still getting in (and heard on the downlink).
I'll reserve further linear SSTV operations until we've had a chance to
discuss the opportunity (and/or abuse). It is definitely a challenge, and
could be a lot of fun. Not sure how possible it would be with manual
tuning, though.
--Roy
K3RLD
------------------------------
Message: 4
Date: Tue, 31 Dec 2019 13:11:42 -0500
From: Roy Dean <royldean@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] SSTV on Linears
Message-ID:
<CADGPg2sH5kz0GJFhL6Q0AYZD_y_BA+-93cVMFBXdu79XWk0aqA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Here is some additional information:
CAS-4B:
https://network.satnogs.org/observations/1469843/
Here you can see two SSTV transmissions starting at about 150s.
I see no impact on the ongoing qso's going on higher up the passband.
CAS-4A:
https://network.satnogs.org/observations/1469844/
Here there is an SSTV transmission at about 200s, also doesn't seem to
impact the ongoing qsos.
And yes - all of this was in SSB. I suppose a trial in NFM would really
cause havoc on the transponder.
--Roy
K3RLD
------------------------------
Message: 5
Date: Tue, 31 Dec 2019 18:53:34 +0000 (UTC)
From: M5AKA <m5aka@?????.??.??>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] A21EME Video
Message-ID: <1553066399.8492835.1577818414729@????.?????.???>
Content-Type: text/plain; charset=UTF-8
December 2019 issue of OSCAR News is now available for e-members to download
https://amsat-uk.org/2019/12/31/december-2019-oscar-news/
A21EME Moonbounce and QO-100 Dxpedition video
https://amsat-uk.org/2019/12/27/a21eme-moonbounce-qo100/
TF3YOTA active on Es?hail-2 / QO-100 satellite
https://amsat-uk.org/2019/12/20/tf3yota-active-on-eshail-2-qo-100-satellite/
CAMSAT CAS-6 satellite launched December 20
https://amsat-uk.org/2019/12/19/camsat-cas-6-satellite/
Trevor M5AKA
----
AMSAT-UK?http://amsat-uk.org/
Twitter?https://twitter.com/AmsatUK
Facebook?https://facebook.com/AmsatUK
YouTube?https://youtube.com/AmsatUK
----
------------------------------
Message: 6
Date: Tue, 31 Dec 2019 16:39:01 -0600
From: "Mark D. Johns" <mjohns+K0JM@??????.???>
To: Scott <scott23192@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] SSTV on Linears
Message-ID:
<CAHKCqnAm9BQErW3h5Lz-Kw78ZkmyPP=8M7LKGEE+DfJms-e2yQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
PLEASE do NOT use FM on a linear transponder!!!
There are very good reasons why there are FM satellites and there are
linear satellites. FM on a linear passband screws things up in a number of
ways, as can be heard whenever a linear has Mexican taxi cabs in its
footprint.
Please, just don?t even suggest such a thing.
On Tue, Dec 31, 2019 at 11:30 Scott via AMSAT-BB <amsat-bb@?????.???> wrote:
> Heard you but was caught off-guard... I assumed you would TX on FM, but it
> seemed to be the normal USB downlink.
>
> Won't be around for the upcoming CAS-4A pass, but have fun & good luck!
>
> -Scott, K4KDR
>
> =======================
>
> On Tue, Dec 31, 2019 at 11:13 AM Roy Dean via AMSAT-BB <amsat-bb@?????.???
> >
> wrote:
>
> > >
> > > I did some SSTV years ago via AO-40. Really fun. But with a LEO
> > > satellite, you will need to be actively adjusting for Doppler shift in
> > > real time, as SSTV is frequency sensitive. You might try some of the
> > > faster modes, especially since a pass is over in just a few minutes.
> Greg
> > > KO6TH
> >
> >
> > I just did a dry run with my station, and think I'm ready to try an
> actual
> > pass. I will be operating in "Robot36" mode on CAS-4B (17:00z) and
> CAS-4A
> > (17:30z) this afternoon as first attempt. I plan on shooting for the
> > lower portion of the 2m passband (going to target the lowest published
> > downlink frequency). I will likely announce several times prior to first
> > transmitting to fine tune. My test image is very simple black and white
> > call/grid. If anybody hears it, please feel free to respond with an
> image
> > (short notice, I know), or voice. If you don't hear me, then something
> > came up to pull me away from my computer or I simply can't get in.
> >
> > --Roy
> > K3RLD
> >
> _______________________________________________
> 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
>
--
***Sent from Gmail on iPhone***
Mark D. Johns, Ph.D. K0JM
Professor Emeritus of Communication Studies at
Luther College, Decorah, Iowa USA
Now residing in Minneapolis, Minn.
------------------------------------------------
"Get the facts first. You can distort them later."
---Mark Twain
------------------------------
Message: 7
Date: Tue, 31 Dec 2019 17:05:07 -0800
From: Mike Herr <wa6ara@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] SKN on the birds
Message-ID:
<CAJrga+UqFXbMRoUApeZQBHTM8iR0U23nuJGKABsjZXtXE=prww@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Where are all the CW ops?
--
Mike Herr
WA6ARA
DM-15dp
Home of The QRP Ranch
No trees were killed in the sending of this message, however, a large
number of electrons were terribly inconvenienced.
"Dad says that anyone who can't use a slide rule is a cultural illiterate
and should not be allowed to vote. Mine is a beauty - a K&E 20-inch Log-log
Duplex Decitrig." - Robert Heinlein
------------------------------
Message: 8
Date: Tue, 31 Dec 2019 20:47:02 -0500
From: "Mark L. Hammond" <marklhammond@?????.???>
To: "AMSAT-BB" <AMSAT-BB@?????.???>
Subject: [amsat-bb] AO-92 in L/v at 0140utc 1/1/2020 for 24 hrs
Message-ID: <20200101014703.715D27F50@??????????.?????.???>
Content-Type: text/plain; charset="us-ascii"
Happy L-band New Year to you all!
73,
Mark L. Hammond [N8MH]
------------------------------
Message: 9
Date: Tue, 31 Dec 2019 19:54:57 -0600
From: Ronald Parsons <w5rkn@?????.???>
To: amsat-bb <amsat-bb@?????.???>
Subject: [amsat-bb] Celebrate New Years with the L Band Boys
Message-ID:
<CAJst_RQnj+6VrUOCYLrCVU0-G0mVJnUu1W-3h713-w50eDfMSQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Or is it the L Boys Band?
AO-92 in L/v at 0140utc 1/1/2020 for 24 hrs
Ron W5RKN
------------------------------
Message: 10
Date: Wed, 1 Jan 2020 02:16:12 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@??????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: [amsat-bb] Satellite presentation in Sun City AZ (6 January
2020)
Message-ID:
<CAN6TEUeWyQ95xKkxmGeniiZ+w1NP5=O+mwmfjtpaC-nEBB_7QA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi!
I will give a satellite-themed presentation for the West Valley Amateur
Radio Club at their meeting on Monday evening, 6 January 2020. The club
meets at the Shepherd of the Desert Lutheran Church on 111th Avenue in
Sun City, Arizona. The meeting is scheduled to start at 7pm. More
information about the club is available at:
https://westvalleyarc.com/
Before the meeting, WD9EWK should be on the air from outside the
meeting, demonstrating satellite operating. There are a couple of
passes that may work for demonstrations before the meeting:
XW-2F at 0052 UTC (5.52pm local time)
XW-2B at 0110 UTC (6.10pm local time)
I may also work passes after the meeting, depending on when it wraps
up. Please check my @?????? Twitter account on Monday evening for that.
If you do not use Twitter, you can see my tweets in a web browser at:
http://twitter.com/WD9EWK
I will tweet out pass information, if I am able to get on after the
meeting. The meeting site is in grid DM33.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @?????? or http://twitter.com/WD9EWK
------------------------------
Message: 11
Date: Wed, 1 Jan 2020 02:33:04 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@??????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: [amsat-bb] AMSAT @ Thunderbird Hamfest in Glendale AZ (11
January 2020)
Message-ID:
<CAN6TEUcGjZ45hhA8Kjjf4wQNF14gKRBxdO7_s371sgaDWAKCbg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hi!
AMSAT will be at the Thunderbird Amateur Radio Club's annual hamfest on
the morning of Saturday, 11 January 2020. The hamfest will be at
Glendale Nazarene Church, at the northwest corner of 59th Avenue and
Cactus Road in Glendale, Arizona. More information about the hamfest is
available at:
http://www.tbirdfest.org/
Information about the Thunderbird Amateur Radio Club is available at:
http://www.w7tbc.org/
WD9EWK will be on the satellites during the hamfest, demonstrating
satellite operating. If you hear WD9EWK on a pass that morning, please
call and join in the demonstration. The hamfest site is in grid DM33,
in Arizona's Maricopa County. QSOs made during the hamfest will be
uploaded to Logbook of the World, and QSL cards are available on
request (please e-mail me directly with the QSO details).
I will tweet updates from the hamfest using my @?????? Twitter account.
If you do not use Twitter, you can see the tweets in a web browser at:
http://twitter.com/WD9EWK
Thanks, and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @?????? or http://twitter.com/WD9EWK
------------------------------
Message: 12
Date: Wed, 1 Jan 2020 16:41:59 +1300
From: "Wendy and Terry Osborne" <wandtosborne@?????.???>
To: "John Brier" <johnbrier@?????.???>
Cc: amsat-bb@?????.???
Subject: [amsat-bb] Ground Station Calculator
Message-ID: <750CF9817DF14C61B273A9D554F9150F@??????????>
Content-Type: text/plain; charset="UTF-8"
Hi John,
While rummaging through my garage looking for old tracking programs for Paul
N8HM,
I found Orbit magazine from May/June 1983. In it is an article by Hasan N0AN
called
AO-10 Ground Station Analysis.
You can use Hasan?s equations to calculate your ground station performance.
I?ve put the equations into a spreadsheet with the numbers for your home
station.
The article and spreadsheet are here:
https://www.dropbox.com/sh/rvb80ajqcpkc47x/AAAHKhwYaI8UkwBR9sx0fw6Fa?dl=0
Best wishes for the new year and 73,
Terry Osborne ZL2BAC
------------------------------
Message: 13
Date: Tue, 31 Dec 2019 22:57:13 -0500
From: Richard Lawn <rjlawn@?????.???>
To: Amsat BB <amsat-bb@?????.???>
Subject: [amsat-bb] New SatPC Version with 9700
Message-ID:
<CADQmrTF_zCiLDkEZbzy1YM76LKcav8W+qErCO0-JF11nrQyN3Q@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I have to admit that I'm having trouble following Erich's instructions for
activating the new spectrum scope for ic-9700 radios he has added. I got to
#5 where he says "Open the SatPC32 menu DIV and click on Spectrum. On my
copy there is no such menu item.
I'd appreciate someone sharing their radio and software setup as I'm not
having any luck.
Happy New Year!
Rick, W2JAZ
------------------------------
Message: 14
Date: Tue, 31 Dec 2019 22:23:04 -0600
From: Stefan Wagener <wageners@?????.???>
To: Richard Lawn <rjlawn@?????.???>
Cc: Amsat BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] New SatPC Version with 9700
Message-ID:
<CAKu8kHACTpvA_M8QQAiYoAtfNmRo2QLNFgFSpWVxGmdcvrLX1w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Its in the menu "ACCY", last item in the list.
Happy New Year,
Stefan
On Tue, Dec 31, 2019 at 9:59 PM Richard Lawn via AMSAT-BB <
amsat-bb@?????.???> wrote:
> I have to admit that I'm having trouble following Erich's instructions for
> activating the new spectrum scope for ic-9700 radios he has added. I got to
> #5 where he says "Open the SatPC32 menu DIV and click on Spectrum. On my
> copy there is no such menu item.
>
> I'd appreciate someone sharing their radio and software setup as I'm not
> having any luck.
>
> Happy New Year!
> Rick, W2JAZ
> _______________________________________________
> 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: 15
Date: Wed, 01 Jan 2020 16:53:15 +0100
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Ground Station Calculator
Message-ID: <F95C3804-D1C9-44D9-B0B9-F5BAC2F0A400@?????.???>
Content-Type: text/plain; charset=utf-8
On January 1, 2020 4:41:59 AM GMT+01:00, Wendy and Terry Osborne via
AMSAT-BB <amsat-bb@?????.???> wrote:
>Hi John,
>
>While rummaging through my garage looking for old tracking programs for
>Paul N8HM,
>I found Orbit magazine from May/June 1983. In it is an article by Hasan
>N0AN called
>AO-10 Ground Station Analysis.
>You can use Hasan?s equations to calculate your ground station
>performance.
Hello Terry,
You might let Phil Karn know about that issue. He's been on a mission to
digitally preserve the old issues.
73,
--- Zach
N0ZGO
------------------------------
Subject: Digest Footer
_______________________________________________
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!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 15, Issue 1
***************************************
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