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CX2SA > SATDIG 19.10.19 19:52l 1035 Lines 28923 Bytes #999 (0) @ WW
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Today's Topics:
1. Athenoxat-1 (Hans BX2ABT)
2. Counterbalance weight on antenna rotator? (Bob Hammond)
3. Re: Counterbalance weight on antenna rotator? (Hasan al-Basri)
4. Re: Counterbalance weight on antenna rotator? (Scott)
5. Upcoming ARISS Contact Schedule as of 2019-10-04 14:30 UTC
(aj9n@???.????
6. Re: Counterbalance weight on antenna rotator? (Leffke, Zachary)
7. Re: Counterbalance weight on antenna rotator? (Bob Hammond)
8. Re: Counterbalance weight on antenna rotator? (Bob Hammond)
9. Re: Counterbalance weight on antenna rotator? (Don KB2YSI)
10. PSAT-2 (Roland Zurmely)
----------------------------------------------------------------------
Message: 1
Date: Fri, 4 Oct 2019 22:13:31 +0800
From: Hans BX2ABT <hans.bx2abt@???.?????.???>
To: AMSAT <amsat-bb@?????.???>
Subject: [amsat-bb] Athenoxat-1
Message-ID: <a877b479-a674-2ced-119a-b4bc0699587c@???.?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
I'm not having luck with decoding Athenoxat-1. I get clean, strong
signals, use the UZ7HO soundmodem with the GOMX-1 4800bd settings. Audio
is getting in, but no decoding whatsoever. The PY4ZBZ web page has good
information, but I'm still not succeeding. Before I waste any more time:
can Athenoxat-1 signals still be decoded or did they change protocol?
Any hints welcome.
73 de Hans
BX2ABT
------------------------------
Message: 2
Date: Fri, 4 Oct 2019 07:56:16 -0700
From: Bob Hammond <propgrinder@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<CAKoB7OqxYs7mac-K68qqTG0MqoEmQ8Sms6Zg2CFA4X9EVSNA5w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Do a lot of you, or all, use a counterbalance weight on your elevation
rotor? If so, how did you implement it?
I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
load on the Yaesu rotor so it lasts longer.
73s,
Bob
W7OTJ
------------------------------
Message: 3
Date: Fri, 4 Oct 2019 10:16:24 -0500
From: Hasan al-Basri <hbasri.schiers6@?????.???>
To: Bob Hammond <propgrinder@?????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<CAM4UQf2J2GZY_mbLpbJYZeBZzhqpfDt-Rb4XBTL9SWgiOJKCbw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Bob,
Are you talking Front to Back (EL) or Side to Side ?
When I had clearance issues I had to mount my 2m yagi forward of its
natural balance point. I hose clamped a steel bar on top and parallel to
the boom to rebalance the load of the yagi on the rotor. It worked fine. I
also used tape protected tie-wraps as a secondary safety net, so the iron
bar didn't fall on someone's head!
I did not have any side to side balance issues across the rotor. (The 70cm
on one side and the 2m on the other, but if I would have, I would have used
the same trick: Steel bar on the lighter side of the boom, to balance the
load across the rotor.)
Cheap, easy, dirty. But be sure to make that steel bar counterweight mount
to the antenna boom or cross-boom VERY secure.
73, N0AN
Hasan
On Fri, Oct 4, 2019 at 9:58 AM Bob Hammond via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Do a lot of you, or all, use a counterbalance weight on your elevation
> rotor? If so, how did you implement it?
>
> I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
> load on the Yaesu rotor so it lasts longer.
>
> 73s,
>
> 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: 4
Date: Fri, 4 Oct 2019 11:18:32 -0400
From: "Scott" <scott23192@?????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID: <1DF2873504184156943F06EAFCAC173F@???????>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Bob!
I don't have any additional weight as a specific counterbalance, but I did
mount my two X-Quads at their balance points.
So, while I was only as scientific as the "balance the antenna on your
finger until it doesn't dip in either direction" method to find the center
point, I feel like I am putting minimal stress on the elevation rotor.
Since my S-Band Wimo helical could not be mounted at just any point along
its length, I did add a few inches of PVC to the bottom of the boom.
Epoxied inside the PVC are a few fishing weights to cause the obvious
mounting point on that antenna to also be the balance point.
-Scott, K4KDR
=======================================================
-----Original Message-----
From: Bob Hammond via AMSAT-BB
Sent: Friday, October 04, 2019 10:56 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] Counterbalance weight on antenna rotator?
Do a lot of you, or all, use a counterbalance weight on your elevation
rotor? If so, how did you implement it?
I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
load on the Yaesu rotor so it lasts longer.
73s,
Bob
W7OTJ
------------------------------
Message: 5
Date: Fri, 4 Oct 2019 15:22:51 +0000 (UTC)
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2019-10-04
14:30 UTC
Message-ID: <511165787.2382234.1570202571275@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Upcoming ARISS Contact Schedule as of 2019-10-04 14:30 UTC
?
Quick list of scheduled contacts and events:
?
?
Amur State University, Blagoveshchensk, Russia, direct via TBD
The ISS callsign is presently scheduled to be RS?ISS
The scheduled astronaut is Alexander Skvortsov (***)
Contact is go for Tue 2019-10-08 08:25 UTC
?
Bampton School, Bampton, United Kingdom, direct via G2LV
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Drew Morgan KI5AAA
Contact is go for: Tue 2019-10-08 12:51:26 UTC 27 deg
Watch for live stream at https://live.ariss.org?
?
Coll?ge Robert Doisneau, Sarralbe, France, direct via F6KFT
The ISS callsign is presently scheduled to be OR4ISS
The scheduled astronaut is Luca Parmitano KF5KDP
Contact is go for: Tue 2019-10-08 14:29:21 UTC 53 deg
?
?
Amur State University, Blagoveshchensk, Russia, direct via TBD
The ISS callsign is presently scheduled to be RS?ISS
The scheduled astronaut is Aleksey Ovchinin
Contact is go for Tue 2019-10-08 08:25 UTC
?
Bampton School, Bampton, United Kingdom, direct via G2LV
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Drew Morgan KI5AAA
Contact is go for: Tue 2019-10-08 12:51:26 UTC 27 deg
Watch for live stream at https://live.ariss.org?
?
Coll?ge Robert Doisneau, Sarralbe, France, direct via F6KFT
The ISS callsign is presently scheduled to be OR4ISS
The scheduled astronaut is Luca Parmitano KF5KDP
Contact is go for: Tue 2019-10-08 14:29:21 UTC 53 deg
?
?
?
Watch for MAI-75 SSTV sessions:
Wed 2019-10-09 09:50 to 14:00 UTC
Thu 2019-10-10 08:55 to 15:15 UTC
?
?
AMSAT-UK International Space Colloquium
Sat 2019-10-12 to Sun 2019-10-13
?
?
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)
?
?
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?2019-10-04 14:30 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 2019-10-02 16:00 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 (United States)
?
Message to US Educators?
Amateur Radio on the International Space Station?
Contact Opportunity?
?
Call for Proposals?
New Proposal Window is October 1, 2019 to November 30, 2019?
?
The Amateur Radio on the International Space Station (ARISS) Program is
seeking formal and informal education institutions and organizations,
individually or working together, to host an Amateur Radio contact with a
crew member on board the ISS.? ARISS anticipates that the contact would be
held between July 1, 2020 and December 31, 2020. Crew scheduling and ISS
orbits will determine the exact contact dates. To maximize these radio
contact opportunities, ARISS is looking for organizations that will draw
large numbers of participants and integrate the contact into a
well-developed education plan.?
?
The deadline to submit a proposal is November 30, 2019.? Proposal
information and documents can be found at http://www.ariss.org .?
?
The Opportunity?
?
Crew members aboard the International Space Station will participate in
scheduled Amateur Radio contacts. These radio contacts are approximately 10
minutes in length and allow students to interact with the astronauts through
a question-and-answer session.?
?
An ARISS contact is a voice-only communication opportunity via Amateur Radio
between astronauts and cosmonauts aboard the space station and classrooms
and communities. ARISS contacts afford education audiences the opportunity
to learn firsthand from astronauts what it is like to live and work in space
and to learn about space research conducted on the ISS. Students also will
have an opportunity to learn about satellite communication, wireless
technology, and radio science. Because of the nature of human spaceflight
and the complexity of scheduling activities aboard the ISS, organizations
must demonstrate flexibility to accommodate changes in dates and times of
the radio contact.?
?
Amateur Radio organizations around the world with the support of NASA and
space agencies in Russia, Canada, Japan and Europe present educational
organizations with this opportunity. The ham radio organizations' volunteer
efforts provide the equipment and operational support to enable
communication between crew on the ISS and students around the world using
Amateur Radio.??
?
More Information
?
For proposal information and more details such as expectations, proposal
guidelines and proposal form, and dates and times of Information Webinars,
go to http://www.ariss.org .
?
Please direct any questions to?ariss.us.education@?????.????
?
******************************************************************************
******************************************************************************
****************
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 136
Francesco IK?WGF with 132
Sergey RV3DR with 126
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 1340.
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1283.
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.r
tf
Check out the Zoho reports of the ARISS contacts
?
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
?
Exp. 59 on orbit
Christina Koch
?
Exp. 60 on orbit
Luca Parmitano KF5KDP
Alexander Skvortsov
Drew Morgan KI5AAA
?
Exp. 61 on orbit
Oleg Skripochka
Jessica Meir
?
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
------------------------------
Message: 6
Date: Fri, 4 Oct 2019 15:46:48 +0000
From: "Leffke, Zachary" <zleffke@??.???>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<BN8PR05MB60680DD5A8F67086212A9D56DF9E0@?????????????.????????.????.???????.??
?>
Content-Type: text/plain; charset="us-ascii"
I use 1 inch perforated square tube
(https://www.lowes.com/pd/Steelworks-L-x-1-in-W-x-1-in-H-Plated-Steel-Perforat
ed-Square-Tube/3049421). On the crossboom, I use a mast adapter bracket
with holes drilled to mate to the perforated square tube and U-bolts with a
saddle clamp to mate the bracket to the crossboom. On the other end I use a
Walmart Barbell handle chopped in half with an angle grinder
(https://www.walmart.com/ip/CAP-Barbell-Standard-14-Dumbbell-Handle-w-Collars-
Single/45014178). The non-threaded sided is welded to the other end of the
perforated steel tube and is horizontally aligned with the threaded end
facing away from the tower (to avoid hitting anything when pointed at
zenith). I then use their standard barbell weights to get the right
counter-balance
(https://www.walmart.com/ip/CAP-Barbell-Black-Olympic-Grip-Plate-Single-2-5-45
-lb/47917559), held in place by the threaded collar of the barbell handle.
The weights are about 2.5-3ft 'behind' the rotator, so mileage
may vary for the amount of weight needed for the counterbalance. I use
two of these, one on either side of the crossboom. Spray painted everything
(including the weights) with an appropriate paint to avoid rust over time.
Using the u-bolts on the crossboom for this setup is a double-edge sword.
The pro is you can slide them left/right to get balance for azimuth, and
then adjust the amount of weight for the elevation balance. The con is that
if the U-bolts aren't a solid mechanical connection with lots of surface
area contact, and if the rotator is jittery at all, the brackets can slip
sometimes....not really an issue if the saddle clamp and u-bolt are sized
right for the crossboom and have lots of surface area contact. You could
also pin the bracket to the rotator if you wanted to avoid this, but then
it's a bit less modular and you'd have to pay attention to hole alignment,
drill the crossboom, etc.
Overall, pretty cheap solution that works at VT on a few different antenna
setups......but it does require the use of an angle grinder and welder the
way we did it.
-Zach, KJ4QLP
--
Research Associate
Aerospace & Ocean Systems Lab
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
-----Original Message-----
From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Scott via AMSAT-BB
Sent: Friday, October 4, 2019 11:19 AM
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Hi Bob!
I don't have any additional weight as a specific counterbalance, but I did
mount my two X-Quads at their balance points.
So, while I was only as scientific as the "balance the antenna on your
finger until it doesn't dip in either direction" method to find the center
point, I feel like I am putting minimal stress on the elevation rotor.
Since my S-Band Wimo helical could not be mounted at just any point along
its length, I did add a few inches of PVC to the bottom of the boom.
Epoxied inside the PVC are a few fishing weights to cause the obvious
mounting point on that antenna to also be the balance point.
-Scott, K4KDR
=======================================================
-----Original Message-----
From: Bob Hammond via AMSAT-BB
Sent: Friday, October 04, 2019 10:56 AM
To: amsat-bb@?????.???
Subject: [amsat-bb] Counterbalance weight on antenna rotator?
Do a lot of you, or all, use a counterbalance weight on your elevation
rotor? If so, how did you implement it?
I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
load on the Yaesu rotor so it lasts longer.
73s,
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: Fri, 4 Oct 2019 10:01:02 -0700
From: Bob Hammond <propgrinder@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<CAKoB7OosH15ApSgK+a=tnJNQbPU_R+iHJnHW=a=X7Hk2E0_+iA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I forgot to add that all my antennas are end-mount with the 2M antenna on
one side of the EL rotor and the 23cm and 70cm antennas on the other side.
On Fri, Oct 4, 2019 at 7:56 AM Bob Hammond <propgrinder@?????.???> wrote:
> Do a lot of you, or all, use a counterbalance weight on your elevation
> rotor? If so, how did you implement it?
>
> I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
> load on the Yaesu rotor so it lasts longer.
>
> 73s,
>
> Bob
> W7OTJ
>
------------------------------
Message: 8
Date: Fri, 4 Oct 2019 15:41:53 -0700
From: Bob Hammond <propgrinder@?????.???>
To: Hasan al-Basri <hbasri.schiers6@?????.???>
Cc: AMSAT-BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<CAKoB7OoQSRC6RHE8Z+dvJY9KUHYxj2ycngpM_qOPtz00PRME5w@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Hasan, front to back on the EL so as to reduce the load on the motor and
gears.
thanks,
Bob
On Fri, Oct 4, 2019 at 8:16 AM Hasan al-Basri <hbasri.schiers6@?????.???>
wrote:
> Bob,
> Are you talking Front to Back (EL) or Side to Side ?
>
> When I had clearance issues I had to mount my 2m yagi forward of its
> natural balance point. I hose clamped a steel bar on top and parallel to
> the boom to rebalance the load of the yagi on the rotor. It worked fine. I
> also used tape protected tie-wraps as a secondary safety net, so the iron
> bar didn't fall on someone's head!
>
> I did not have any side to side balance issues across the rotor. (The 70cm
> on one side and the 2m on the other, but if I would have, I would have used
> the same trick: Steel bar on the lighter side of the boom, to balance the
> load across the rotor.)
>
> Cheap, easy, dirty. But be sure to make that steel bar counterweight mount
> to the antenna boom or cross-boom VERY secure.
>
> 73, N0AN
>
>
> Hasan
>
>
> On Fri, Oct 4, 2019 at 9:58 AM Bob Hammond via AMSAT-BB <
> amsat-bb@?????.???> wrote:
>
>> Do a lot of you, or all, use a counterbalance weight on your elevation
>> rotor? If so, how did you implement it?
>>
>> I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce the
>> load on the Yaesu rotor so it lasts longer.
>>
>> 73s,
>>
>> 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: Fri, 4 Oct 2019 19:01:37 -0400
From: Don KB2YSI <kb2ysi@?????.???>
To: Bob Hammond <propgrinder@?????.???>
Cc: AMSAT BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] Counterbalance weight on antenna rotator?
Message-ID:
<CAAJiE8O8GvZ+M-yh4+733Ci3BEy+MC2kA+oTMTj0MC1itMZDRg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I use a square wooden dowel on the back end of my Arrow that I clip my RX
radio on to act as a counter balance.
On Fri, Oct 4, 2019, 18:44 Bob Hammond via AMSAT-BB <amsat-bb@?????.???>
wrote:
> Hasan, front to back on the EL so as to reduce the load on the motor and
> gears.
>
> thanks,
>
> Bob
>
> On Fri, Oct 4, 2019 at 8:16 AM Hasan al-Basri <hbasri.schiers6@?????.???>
> wrote:
>
> > Bob,
> > Are you talking Front to Back (EL) or Side to Side ?
> >
> > When I had clearance issues I had to mount my 2m yagi forward of its
> > natural balance point. I hose clamped a steel bar on top and parallel to
> > the boom to rebalance the load of the yagi on the rotor. It worked fine.
> I
> > also used tape protected tie-wraps as a secondary safety net, so the iron
> > bar didn't fall on someone's head!
> >
> > I did not have any side to side balance issues across the rotor. (The
> 70cm
> > on one side and the 2m on the other, but if I would have, I would have
> used
> > the same trick: Steel bar on the lighter side of the boom, to balance the
> > load across the rotor.)
> >
> > Cheap, easy, dirty. But be sure to make that steel bar counterweight
> mount
> > to the antenna boom or cross-boom VERY secure.
> >
> > 73, N0AN
> >
> >
> > Hasan
> >
> >
> > On Fri, Oct 4, 2019 at 9:58 AM Bob Hammond via AMSAT-BB <
> > amsat-bb@?????.???> wrote:
> >
> >> Do a lot of you, or all, use a counterbalance weight on your elevation
> >> rotor? If so, how did you implement it?
> >>
> >> I have 3 antennas (2M, 70cm, 23cm) on my cross boom and want to reduce
> the
> >> load on the Yaesu rotor so it lasts longer.
> >>
> >> 73s,
> >>
> >> 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
>
------------------------------
Message: 10
Date: Sat, 5 Oct 2019 11:19:26 +0000 (UTC)
From: Roland Zurmely <py4zbz@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] PSAT-2
Message-ID: <1660763911.2586448.1570274366154@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Check out the 33 SSTV images received from PSAT-2 :
<https://www.qsl.net/py4zbz/psat2.htm#a>
73 de Roland PY4ZBZ
------------------------------
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 14, Issue 367
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