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CX2SA > SATDIG 12.08.20 14:30l 1084 Lines 33444 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: RS Satellite Robot (Vince Fiscus, KB7ADL)
2. Upcoming ARISS Contact Schedule as of 2020-08-11 16:30 UTC
(aj9n@???.????
3. Re: Another call for forensic accounting and an inventory
(Bruce Perens)
4. Cubesat Design Specification update call for review (Bruce Perens)
5. Re: ME to HI for WAS--Possible at present? (Don KB2YSI)
6. Re: Yaesu G-5500 rotator boom mounting (Bob Hammond)
7. 70cm LNA (Zach Metzinger)
8. Re: Yaesu G-5500 rotator boom mounting (Bob Hammond)
9. Re: Yaesu G-5500 rotator boom mounting (Michael Walker)
----------------------------------------------------------------------
Message: 1
Date: Tue, 11 Aug 2020 11:24:27 -0600
From: "Vince Fiscus, KB7ADL" <vlfiscus@???.???>
To: Amsat-bb@?????.???
Subject: Re: [amsat-bb] RS Satellite Robot
Message-ID: <5.2.1.1.2.20200811112124.02124118@???.?????????.???>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 09:03 AM 8/11/2020 -0700, you wrote:
>Hi Gary,
>
>The satellite was RS-13. A little fiddly to make it work (my fist
>wasn't good then, and hasn't improved since), but with some patience one
>could make a contact. A quick search in the AMSAT archives turned up
>this article:
>
>https://www.amsat.org/amsat/archive/amsat-bb/199905/msg00084.html
>
>Good fun,
>
>Greg KO6TH
RS-10/11 had a robot too. Worked it many times. The neat
thing to me about the robot was that it would reply back to
you and the same CW speed you were sending.
Never bothered to try and get a qsl card.
KB7ADL
------------------------------
Message: 2
Date: Tue, 11 Aug 2020 16:23:52 +0000 (UTC)
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2020-08-11
16:30 UTC
Message-ID: <1949714332.241887.1597163032628@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Upcoming ARISS Contact Schedule as of 2020-08-11 16:30 UTC
?
Quick list of scheduled contacts and events:
?
Sorry gang for the lack of a heads up but we just found out about this
contact today.? (***)
?
GAGARIN FROM SPACE. Performing a radio amateur session with schoolchildren
of Tatarstan, Russia, direct via RZ4PXO (***)
The ISS callsign is presently scheduled to be RS?ISS (***)
The scheduled astronaut is Ivan Vagner (***)
Contact was successful for: 2020-08-07 11:18 UTC (***)
?
?
Kopernik Observatory & Science Center, Vestal, NY, direct via K2ZRO
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Chris Cassidy KF5KDR
Contact is go for: Fri 2020-08-21 18:23:40 UTC 29 deg
?
?
##############################################################################
##########################################################
A multi-point telebridge contact means that each student will be on the
telebridge from their own home.
*************************************************
?
ARISS is very aware of the impact that COVID-19 is having on schools and the
public in general.? As such, we may have last minute cancellations or
postponements of school contacts.? As always, I will try to provide everyone
with near-real-time updates.?
?
The following schools have now been postponed or cancelled due to COVID-19:?
?
Postponed:
No new schools
?
Cancelled:
No new schools
?
?
?
The ARISS webpage is at https://www.ariss.org/ ???
?
Watch for future COVID-19 related announcements here also.
?
?
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
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
ARISS Contact Applications (United States)
?
?
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?2020-08-11 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.
?
https://www.amsat.org/amsat/ariss/news/arissnews.rtf
https://www.amsat.org/amsat/ariss/news/arissnews.txt
?
?
The successful school list has been updated as of 2020-08-11 16:30 UTC.
https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
?
?
?
The ARISS webpage is at https://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
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
?
ARISS Contact Applications (United States)
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
?
Message to US Educators
?
ARISS Contact Applications (United States)
?
The Proposal Window of February 1, 2020 to March 31, 2020 has now closed.
?
For future proposal information and more details such as expectations,
proposal guidelines and proposal form, and dates and times of Information
Webinars, go to www.ariss.org.
?
Please direct any questions to?ariss.us.education@?????.???.
?
About ARISS:
?
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies that
support the International Space Station (ISS).? In the United States,
sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American
Radio Relay League (ARRL), the ISS National Lab and National Aeronautics and
Space Administration (NASA). The primary goal of ARISS is to promote
exploration of science, technology, engineering, and mathematics (STEAM)
topics by organizing scheduled contacts via amateur radio between crew
members aboard the ISS and students in classrooms or public forms. Before
and during these radio contacts, students, educators, parents, and
communities learn about space, space technologies, and amateur radio. For
more information, see www.ariss.org.
?
******************************************************************************
**
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:? https://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) https://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 https://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:
?
Francesco IK?WGF with 140
Satoshi 7M3TJZ with 138
Sergey RV3DR with 135 (***)
Gaston ON4WF with 123
?
****************************************************************************
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 1394. (***)
Each school counts as 1 event.??????????????????????????????????
Total number of ARISS ISS to earth school contacts is 1327. (***)
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 48.
?
A complete year by year breakdown of the contacts may be found in the
file.
https://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:
https://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
https://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. 62 now on orbit
Chris Cassidy KF5KDR
Anatoli Ivanishin
Ivan Vagner
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
?
?
?
?
?
?
?
------------------------------
Message: 3
Date: Tue, 11 Aug 2020 09:25:49 -0700
From: Bruce Perens <bruce@??????.???>
To: Greg <almetco@???????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Another call for forensic accounting and an
inventory
Message-ID:
<CAK2MWOsowORM+N5RKjC7wwLASiJQ3fnM5MGnA0MzrW_fc3Xgug@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Greg,
Many organizations and companies operate with open books. This would help
to achieve a greater trust level. Forensic accounting is something that can
be called for if the books, once disclosed, show a problem. But simply
opening them is better, because it allows anyone to perform their own
audit, with professional staff if necessary. Just take pictures of the
ledger, page by page (assuming Martha has done it the same way since 1970)
or publish a CSV file. Black out names for privacy if necessary.
The 990 and annual audits show the larger picture, to an extent, but they
only list column items like "legal and accounting expenses" - yes, those
two were grouped together, potentially obscuring an issue. I think the
question here goes to individual expenditures, and whether there are any
board or committee minutes corresponding to them.
I will also recommend that ORI publish its books. It's their decision, not
mine.
Thanks
Bruce
On Tue, Aug 11, 2020, 2:59 AM Greg via AMSAT-BB <amsat-bb@?????.???> wrote:
> First of all, if money was spent unwisely, that is still not a reason for
> a forensic audit. If it was against bylaws and they have the proof, your
> issue isn?t getting a forensic accountant, its determining what your
> actions should be under those bylaws. Unless the money was ?coded? to an
> area that makes the transaction invisible, then that may be different. For
> example, legal fees were capitalized into satellite costs. Even still,
> when the auditor released the audited financial statements, during his
> field work, his test are not to detect fraud but proper classification of
> such items. He can use various tests from looking at transactions that
> might have an attorneys name shown as a satellite cost etc using various
> sampling techniques. His audit attests that the statements are a true
> financial accounting picture of the organization. However financial
> audits, those that attest financial statements, are not conducted to catch
> fraud though they do many times.
>
> So, forensic accounting cost is a waste of money unless you suspect
> fraud. If the two directors suspect fraud, show the evidence and that will
> take the cloud of suspicion away. Then do a forensic fraud to account for
> losses. Other wise, burn the money.
>
> ex-CPA
> Greg
> N3MVF
>
>
>
> On Aug 11, 2020, at 12:41 AM, Jeff Johns via AMSAT-BB <amsat-bb@?????.???>
> wrote:
>
> I am aware of what the costs would be but wouldn?t it be better to bite
> the bullet and remove the cloud from AMSAT? I feel that by not doing so it
> could be more costly by losing more member and donor dollars.
>
> Based on reports from two BoDs, tens of thousands of dollars were spent
> unwisely and against bylaws. It?s time to spend some money wisely in an
> open and transparent fashion.
>
> IMHO, it would be best to go ahead and make the cloud go away. I?ve asked
> those running against me to speak-up and join me in this call but I have
> heard nothing from them. I have, however, received many emails from regular
> members that agree with me so I?m not the only one that wants this to
> happen.
>
> For this to happen, it would require the Board to meet (which they don?t
> currently do on a regular basis) and for a motion to be made and passed.
> There?s definitely smoke that many members see and smoke only comes from
> fires. Let?s put out this fire, once and for all, and move forward. By not
> putting out the fire the FUD will remain and that will cost AMSAT money in
> the form of lost members and donations.
>
> Jeff WE4B
> http://we4bravo.com
>
> > On Aug 10, 2020, at 10:26 PM, Greg via AMSAT-BB <amsat-bb@?????.???>
> wrote:
> >
> > ?As an ex-CPA I ask, has anyone realized what the cost of such an audit
> would be? I can tell you that unless you have a reasonable suspicion and
> probability, not possibility, of fraudulent activities, you will just burn
> many thousands that could be used on satellites.
> >
> > Greg
> > N3MVF
> >
> > On Aug 10, 2020, at 9:25 PM, Joe Leikhim via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >
> > That is sort of what has happened to the NRA!
> >
> > I doubt we have any "grifters" in AMSAT. To be safe, look out for any
> Jaguar owners as Jeremy Clarkson of Top Gear points out.
> >
> > That said the P&L statement should be reviewed.
> >
> > Locally, our ex mayor decided to buy a failing golf course with our
> stormwater funds to save it from development. An action clearly benefiting
> only one neighborhood. Depending on who you talk to on a given day, it is
> either making or losing money. This is a case where the P&L needs to be
> made public.
> >
> > "Yes. I see the ?plot? clearly now. A few grifters decided the best way
> to get ?rich" was to join a ham radio organization. They would lay low for
> 10-30 years so as not to arouse suspicion. They would volunteer their time
> and efforts for decades to provide an smokescreen so other members wouldn?t
> suspect that they would one day steal money and inventory from the coffers
> and then refuse to provide a detailed accounting when requested?
> >
> >
> > Jeff, KE9V"
> >
> > --
> > Joe Leikhim
> >
> >
> > Leikhim and Associates
> >
> > Communications Consultants
> >
> > Oviedo, Florida
> >
> > JLeikhim@???????.???
> >
> > 407-982-0446
> >
> > WWW.LEIKHIM.COM
> >
> > _______________________________________________
> > 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 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 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 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: 4
Date: Tue, 11 Aug 2020 15:58:45 -0700
From: Bruce Perens <bruce@??????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Cubesat Design Specification update call for
review
Message-ID:
<CAK2MWOsgDFHKaRBvMh+qo3m+c1B8NRYR+wpd12R_WoiDuseB7A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Cal Poly wants feedback for their new spec at
https://static1.squarespace.com/static/5418c831e4b0fa4ecac1bacd/t/5f24997b6dee
a10cc52bb016/1596234122437/CDS+REV14+2020-07-31+DRAFT.pdf
"The original CDS introduced the CubeSat Standard to the world almost two
decades ago. It defined the physical and electrical characteristics for a
1U and 3U size CubeSat and included requirements for interfacing with the
only CubeSat dispenser available at the time, the Poly-Pico Orbital
Deployer (P-POD). Since then the industry has expanded to include more
standard sizes and additional dispensers with more available options.
To accommodate these new advancements, the CDS has been retooled to be more
flexible and inclusive of developments within the industry. Requirements
that were originally written specifically for the P-POD will encompass
requirements for all dispensers currently available. It is also the
intention for the new revision of the CDS to identify the available options
on dispensers that are widely available for use. Currently that list is
limited to dispensers that publish their specifications online, but can be
updated as dispenser companies make that information available to us. The
CDS will also define all U configurations in one document with one set of
requirements for ease of reference."
------------------------------
Message: 5
Date: Tue, 11 Aug 2020 20:29:06 -0400
From: Don KB2YSI <kb2ysi@?????.???>
To: Wes Baden <badencapecod@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] ME to HI for WAS--Possible at present?
Message-ID:
<CAAJiE8NC2x=WpQ9rOxf4op6Gu6NFP-jBqfnk8EcP_+U4pxRBhA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Ah yes, the dreaded WAS from the NE. While I have a substantially better
chance of being able to make the QSO to HI, AO-7 and I do not get along. I
am a bit better on RS-44 but have not attempted low angle passes on it.
There is needing the perfect pass, which seemed to be spaced quite a bit
apart, and someone there that is willing and able to work said pass. Even
then, it is a tiny window of mutual footprint.
HEO would make it more possible. GEO might feel like cheating!
On Mon, Aug 10, 2020, 14:54 Wes Baden via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Any ideas about the following? My QTH is in Maine, FN54, 120 feet ASL. I'm
> closing in on WAS, but the problem is going to be Hawaii. From my rough
> calculations, I need a SAT that has a 4500+ mile footprint, meaning an
> apogee of 1200+ miles, and even then any operating window will be pretty
> short. Current MEO satellites do not seem to offer a window quite that
> big, or am I missing something? In theory, I guess, I could go to Mt.
> Washington, NH (fortunately only 90 miles away) and a KH6 could go up on a
> volcanic peak there, to try to make use of over-the-horizon signal
> bending. But I'm not sure if even that would work at the present time, and
> in any case I can wait if a better MEO or an HEO bird is in the offing in
> the next few years. Does anyone know if ME-HI will be possible in the
> future, and if so when? WAS SAT is on my bucket list. Of course I envy
> all of you to the west of me, who can contact HI, but on the other hand it
> is nice to be only 3200 or so from London, 3800 miles from Berlin. We are
> all prisoners of our locations, at least until another HEO satellite is in
> orbit again. Thanks for feedback. And by the way, I'm always happy to
> sked with anyone needing FN54, not the rarest grid in ME but a challenge
> for many stations, especially out west or so they tell me.
>
> 73, Wes NA1ME
> _______________________________________________
> 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: 6
Date: Tue, 11 Aug 2020 19:02:41 -0700
From: Bob Hammond <propgrinder@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Yaesu G-5500 rotator boom mounting
Message-ID:
<CAKoB7Ors7_V=aWYfUFm=jZ1EUDv-3JpGzTQ9XNX-qTNqbbWY8g@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Thanks everyone for the ideas.
In my situation, I use a 1.25" solid fiberglass rod as the cross boom with
a split PVC pipe shim inside the EL rotor.
I used strips of 3M anti-slip tape between the fiberglass rod and the PVC
pipe for added friction where clamped.
This has worked quite well until we had temps near 100 F. I think the
anti-slip tape adhesive got soft and started slipping.
Part of the problem is that my three antennas are mounted on the end of
their booms so there's a fair amount of torque/moment arm on the cross boom
and the clamping area.
I'll put my antenna counterbalance back on the cross boom opposite the
antennas and that should take care of the issue during hot weather. I had
removed it thinking the less mass to rotate/elevate would make my rotor
gears last longer.
Bob W7OTJ
On Fri, Aug 7, 2020 at 11:02 AM Ed Krome <e.krome@???????.???> wrote:
> Just the included clamps have proven adequate for a pair of 12? long
> yagis.
>
> Ed Krome K9EK
>
> Sent from my iPhone
>
> > On Aug 7, 2020, at 12:35 PM, Bob Hammond via AMSAT-BB <
> amsat-bb@?????.???> wrote:
> >
> > ?How do others attach their fiberglass boom to the elevation rotor on a
> > G-5500? Just use the boom clamps provided? Make a sleeve to fit between
> > the smaller fiberglass boom and elevation rotor inside diameter? Drill a
> > hole and pin it?
> >
> > All ideas appreciated.
> >
> > Bob W7OTJ
> > _______________________________________________
> > 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: 7
Date: Tue, 11 Aug 2020 21:47:28 -0500
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???????? Metzinger via AMSAT-BB
<amsat-bb@?????.???>
Subject: [amsat-bb] 70cm LNA
Message-ID: <24F362D3-EE65-4C4E-B0D6-D0EB77A847D4@?????.???>
Content-Type: text/plain; charset=utf-8
On August 9, 2020 4:57:21 PM CDT, Zach Metzinger via AMSAT-BB
<amsat-bb@?????.???> wrote:
>I've ordered some 433MHz SAW filter (RFMi) from Mouser to install at
>the output of my homebrew LNA. Hopefully this will reduce overload of
>the FT-847. A FCDP+, with it's internal SAW, works very well with that
>antenna and LNA, so I think I'm on the right track.
Success! The SAW filter eliminated the offending cell-tower sources. The
noise floor barely moves when the preamp is switched in, while the desired
beacon signal increases significantly.
I will be attempting to measure the NF with the Y-factor method.
The exact filter used was SF2446E
(Digikey 2410-SF2446E-ND).
--- Zach
N0ZGO
------------------------------
Message: 8
Date: Wed, 12 Aug 2020 05:10:38 -0700
From: Bob Hammond <propgrinder@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Yaesu G-5500 rotator boom mounting
Message-ID:
<CAKoB7OoZ+DUd_Z4Zh2+mMoqQ+fd2wcvQdaE28UX-Y_5nDMH7Mg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I can send pics to those who'd like to see how I did things. They are too
big to post on the BB.
Bob W7OTJ
On Tue, Aug 11, 2020 at 7:02 PM Bob Hammond <propgrinder@?????.???> wrote:
> Thanks everyone for the ideas.
>
> In my situation, I use a 1.25" solid fiberglass rod as the cross boom with
> a split PVC pipe shim inside the EL rotor.
> I used strips of 3M anti-slip tape between the fiberglass rod and the PVC
> pipe for added friction where clamped.
>
> This has worked quite well until we had temps near 100 F. I think the
> anti-slip tape adhesive got soft and started slipping.
> Part of the problem is that my three antennas are mounted on the end of
> their booms so there's a fair amount of torque/moment arm on the cross boom
> and the clamping area.
>
> I'll put my antenna counterbalance back on the cross boom opposite the
> antennas and that should take care of the issue during hot weather. I had
> removed it thinking the less mass to rotate/elevate would make my rotor
> gears last longer.
>
> Bob W7OTJ
>
> On Fri, Aug 7, 2020 at 11:02 AM Ed Krome <e.krome@???????.???> wrote:
>
>> Just the included clamps have proven adequate for a pair of 12? long
>> yagis.
>>
>> Ed Krome K9EK
>>
>> Sent from my iPhone
>>
>> > On Aug 7, 2020, at 12:35 PM, Bob Hammond via AMSAT-BB <
>> amsat-bb@?????.???> wrote:
>> >
>> > ?How do others attach their fiberglass boom to the elevation rotor on a
>> > G-5500? Just use the boom clamps provided? Make a sleeve to fit
>> between
>> > the smaller fiberglass boom and elevation rotor inside diameter? Drill
>> a
>> > hole and pin it?
>> >
>> > All ideas appreciated.
>> >
>> > Bob W7OTJ
>> > _______________________________________________
>> > 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: Wed, 12 Aug 2020 08:20:08 -0400
From: Michael Walker <va3mw@??????????.???>
To: Bob Hammond <propgrinder@?????.???>
Cc: AMSAT <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Yaesu G-5500 rotator boom mounting
Message-ID:
<CA+33ts7FXOFF939saTdvff0SES2uRaW-GehUGZDn=_Mm1jz0_g@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I took some 1" aluminum angle that I got at Home Depot.
I cut a piece about the length of the elevation rotor mount and placed it
in the rotator on top of the fiberglass boom.
My clamps now pull down on top of the boom and help to bite to keep it in
place. Sorry, I can't get a picture since it is on the roof at the moment,
but if I climb up there, I will grab one.
I would do a sketch and add it to the email, but this is such an
archaic mail tool, it won't accept attachments.
Mike va3mw
On Wed, Aug 12, 2020 at 8:16 AM Bob Hammond via AMSAT-BB <amsat-bb@?????.???>
wrote:
> I can send pics to those who'd like to see how I did things. They are too
> big to post on the BB.
>
> Bob W7OTJ
>
> On Tue, Aug 11, 2020 at 7:02 PM Bob Hammond <propgrinder@?????.???> wrote:
>
> > Thanks everyone for the ideas.
> >
> > In my situation, I use a 1.25" solid fiberglass rod as the cross boom
> with
> > a split PVC pipe shim inside the EL rotor.
> > I used strips of 3M anti-slip tape between the fiberglass rod and the PVC
> > pipe for added friction where clamped.
> >
> > This has worked quite well until we had temps near 100 F. I think the
> > anti-slip tape adhesive got soft and started slipping.
> > Part of the problem is that my three antennas are mounted on the end of
> > their booms so there's a fair amount of torque/moment arm on the cross
> boom
> > and the clamping area.
> >
> > I'll put my antenna counterbalance back on the cross boom opposite the
> > antennas and that should take care of the issue during hot weather. I
> had
> > removed it thinking the less mass to rotate/elevate would make my rotor
> > gears last longer.
> >
> > Bob W7OTJ
> >
> > On Fri, Aug 7, 2020 at 11:02 AM Ed Krome <e.krome@???????.???> wrote:
> >
> >> Just the included clamps have proven adequate for a pair of 12? long
> >> yagis.
> >>
> >> Ed Krome K9EK
> >>
> >> Sent from my iPhone
> >>
> >> > On Aug 7, 2020, at 12:35 PM, Bob Hammond via AMSAT-BB <
> >> amsat-bb@?????.???> wrote:
> >> >
> >> > ?How do others attach their fiberglass boom to the elevation rotor on
> a
> >> > G-5500? Just use the boom clamps provided? Make a sleeve to fit
> >> between
> >> > the smaller fiberglass boom and elevation rotor inside diameter?
> Drill
> >> a
> >> > hole and pin it?
> >> >
> >> > All ideas appreciated.
> >> >
> >> > Bob W7OTJ
> >> > _______________________________________________
> >> > 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 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
>
------------------------------
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 332
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