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CX2SA > SATDIG 11.08.10 21:20l 610 Lines 20860 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. G5500B Rotor Test (Andrew)
2. Re: Former NASA head on Downed Plane - update (David - KG4ZLB)
3. Re: Former NASA head on Downed Plane - update (Jeff Moore)
4. Re: Former NASA head on Downed Plane - update
(W4ART Arthur Feller)
5. Former NASA Chief, Son, Survive (Clint Bradford)
6. Re: TubeSats - DIY Satellites (George Henry)
7. Re: Yaesu G5500B Repair (i8cvs)
8. G5500B Rotor Repair (Andrew)
9. Sat Dishes and P3E Q's (Ron Overdrive)
10. Re: Sat Dishes and P3E Q's (jmfranke)
11. Re: G5500B Rotor Repair (i8cvs)
12. Re: Sat Dishes and P3E Q's (i8cvs)
----------------------------------------------------------------------
Message: 1
Date: Tue, 10 Aug 2010 15:58:38 -0400
From: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>
Subject: [amsat-bb] G5500B Rotor Test
To: <amsat-bb@xxxxx.xxx>
Message-ID: <DAC5AA8239EE4877BF1A6888EC1373A4@xxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Alan, Thank you for the G5500B manual and schematic. And how you tested your
G5500B. I suspect the 180 limit switch isn't working. When the wx cools down
A bit, I will put your test to the G5500B here.
Andy
WA9WUA
------------------------------
Message: 2
Date: Tue, 10 Aug 2010 16:23:37 -0400
From: David - KG4ZLB <kg4zlb@xxxxx.xxx>
Subject: [amsat-bb] Re: Former NASA head on Downed Plane - update
To: amsat-bb@xxxxx.xxx
Message-ID: <4C61B549.6030300@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
ORLANDO, Fla. (AP) - A former NASA spokesman says ex-NASA chief Sean
O'Keefe survived the plane crash in Alaska that killed former Sen. Ted
Stevens.
Glenn Mahone says O'Keefe's teenage son, Kevin, was also among the four
survivors.
The plane crashed Monday night near a remote fishing village in Alaska,
killing five.
The former spokesman for the space agency says he has talked to
O'Keefe's family. They told him that O'Keefe and his son had some broken
bones and other injuries.
David
KG4ZLB
On 8/10/2010 12:41, Clint Bradford wrote:
> A private aircraft carrying a former head of NASA and, possibly, a former
U.S. senator crashed Monday night in a rugged stretch of Alaska. The
accident left at least five people dead.
>
> EADS North America said its chief executive officer, Sean O'Keefe, a
former head of the National Aeronautics and Space Administration, was a
passenger on the aircraft.
>
> Developing story.
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
------------------------------
Message: 3
Date: Tue, 10 Aug 2010 13:54:06 -0700
From: "Jeff Moore" <tnetcenter@xxxxx.xxx>
Subject: [amsat-bb] Re: Former NASA head on Downed Plane - update
To: <amsat-bb@xxxxx.xxx>
Message-ID: <469283B3ADC84127AC673260FC06D5D7@xxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I've heard that Reuters is reporting their survival and I certainly hope
it's true, however, based on the press conference I just watched from
Alaska, there hasn't been any official release of survivors names. Only
that there were 4 survivors, 2 of whom are in serious condition - NO NAMES.
Jeff -- KE7ACY
CN94
----- Original Message ----- From: "David - KG4ZLB" <kg4zlb@xxxxx.xxx>
ORLANDO, Fla. (AP) - A former NASA spokesman says ex-NASA chief Sean
O'Keefe survived the plane crash in Alaska that killed former Sen. Ted
Stevens.
Glenn Mahone says O'Keefe's teenage son, Kevin, was also among the four
survivors.
The plane crashed Monday night near a remote fishing village in Alaska,
killing five.
The former spokesman for the space agency says he has talked to
O'Keefe's family. They told him that O'Keefe and his son had some broken
bones and other injuries.
David
KG4ZLB
On 8/10/2010 12:41, Clint Bradford wrote:
> A private aircraft carrying a former head of NASA and, possibly, a former
> U.S. senator crashed Monday night in a rugged stretch of Alaska. The
> accident left at least five people dead.
>
> EADS North America said its chief executive officer, Sean O'Keefe, a
> former head of the National Aeronautics and Space Administration, was a
> passenger on the aircraft.
>
> Developing story.
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 10 Aug 2010 17:29:56 -0400
From: W4ART Arthur Feller <afeller@xxxx.xxx>
Subject: [amsat-bb] Re: Former NASA head on Downed Plane - update
To: Jeff Moore <tnetcenter@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <7BE201E9-E297-41E7-98E9-18C07AB98422@xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>From the Washington Post:
"O'Keefe, 54, and his teenage son Kevin survived the crash with multiple
injuries, according to the Associated Press. The news service cited a former
NASA spokesman, who said he had spoken to O'Keefe's family."
On 10-Aug-2010, at 04:54 PM, Jeff Moore wrote:
> I've heard that Reuters is reporting their survival and I certainly hope
> it's true, however, based on the press conference I just watched from
> Alaska, there hasn't been any official release of survivors names. Only
> that there were 4 survivors, 2 of whom are in serious condition - NO NAMES.
>
> Jeff -- KE7ACY
> CN94
>
> ----- Original Message ----- From: "David - KG4ZLB" <kg4zlb@xxxxx.xxx>
>
> ORLANDO, Fla. (AP) - A former NASA spokesman says ex-NASA chief Sean
> O'Keefe survived the plane crash in Alaska that killed former Sen. Ted
> Stevens.
>
> Glenn Mahone says O'Keefe's teenage son, Kevin, was also among the four
> survivors.
>
> The plane crashed Monday night near a remote fishing village in Alaska,
> killing five.
>
> The former spokesman for the space agency says he has talked to
> O'Keefe's family. They told him that O'Keefe and his son had some broken
> bones and other injuries.
>
> David
> KG4ZLB
>
>
>
> On 8/10/2010 12:41, Clint Bradford wrote:
>> A private aircraft carrying a former head of NASA and, possibly, a former
>> U.S. senator crashed Monday night in a rugged stretch of Alaska. The
>> accident left at least five people dead.
>>
>> EADS North America said its chief executive officer, Sean O'Keefe, a
>> former head of the National Aeronautics and Space Administration, was a
>> passenger on the aircraft.
>>
>> Developing story.
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
"Happiness is a choice. You can be happy or you can miserable. Either way
the distance is the same."
------------------------------
Message: 5
Date: Tue, 10 Aug 2010 16:41:02 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Former NASA Chief, Son, Survive
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <6694C9CF-9B33-417A-8E3F-C6EC5BD75DBD@xxx.xxx>
Content-Type: text/plain; charset=us-ascii
Former NASA head Sean O'Keefe and his son survived plane crash in Alaska,
his company says. Former Sen. Ted Stevens was among at least 5 people
killed. -CNN
------------------------------
Message: 6
Date: Tue, 10 Aug 2010 23:23:43 -0500
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: TubeSats - DIY Satellites
To: "amsat bb" <amsat-bb@xxxxx.xxx>
Message-ID: <881838464E7F4B35A6B27955EA6032FD@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Makes sense... twice as high, twice the price. Not a bad deal for a ride
to 600 kM, though.
IF their N45 launcher actually gets off the ground.
George, KA3HSW
----- Original Message -----
From: <G0MRF@xxx.xxx>
To: <ka3hsw@xxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Tuesday, August 10, 2010 2:59 AM
Subject: Re: [amsat-bb] Re: TubeSats - DIY Satellites
[snip]
>
> Hi George.
>
> I watched the Interorbital presentation at Cal Poly at the weekend. (via
> the web and not in person sadly)
>
> I thought I saw $25,000 on a multiple cubesat launch to 620km.
> Perhaps they have an eye on the QB50 (50 cubesats to 320km) and others
> waiting to fly. It's a big market.
>
> They are starting testing this fall with some sub orbital flights. First
> orbital flight listed for March 2011 but that may slip depending on the
> tests.
>
> The presentation is probably available via u-stream / or cubesat.com
>
> Thanks
>
> David G0MRF
>
------------------------------
Message: 7
Date: Wed, 11 Aug 2010 09:43:35 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Yaesu G5500B Repair
To: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <001601cb3928$e7b0f480$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, August 09, 2010 10:18 PM
Subject: [amsat-bb] Yaesu G5500B Repair
> I need information for my G5500B elevation repair. Its stuck at about 68
> degrees. Reply to direct at wa9wua@xxxxxxxxxx.xxx Any help is appreciated.
>
> Andy
>
Hi Andy, WA9WUA
If your elevation rotator G5500B stuck always at the same elevation of
about 68? you have in it a mechanical problem or with bearings or with
gears because no electrical parts or limit switches are involved.
If you look at the G5500B Instruction Manual you will find the exploded
mechanical drawing with parts numbar and location.
Each bearing is composed by part numbar (33) and (34) made each with
20 ball bearings size 0.312 ( 5/16 inch ) and a bearing holder part number
( 33)
Two grooves for the balls are casted into the "aluminum boom shaft tube"
part number (29) and the other two grooves are casted into the rotor
housing side (1) and side (2)
The bearing holder (33) is a stainless steel toothed ring with 20 teeth and
the purpose of it is to keep the 20 balls separated each other while holding
the lubricant grease between them and lubricate the grooves during rotation
preventing in addition the wather to enter the rotor housing from the
outside.
The problem here is that the balls are not in contact-to-contact each other
but they are separated each other by the soft teeth of the bearing holder.
In this condition when the weight of the antennas is very large the radial
vertical force generated by it's weight is not absorbed by the balls but is
completely applied over the teeth and so the 20 balls will be forced to
separate and they spread away one from the other.
This load is responsible to wear out, to deform and to cut the teeth of
the bearing holder but as soon only one or two teeth are broken then
the distance from the balls decreases at a point that the boom tube sandwich
gear (31) has room to fall down a little bit so that the distance between
it and the assembly gear (9) i.e. the pinion increases up to a point that
it fail to come into gear with the pinion (9)
To cure this problem and prevent damages between the tooths of pinion and
boom tube sandwich gear (31) I have removed the bearing holder (33) but
I have filled the grooves with black molibden grease adding into it , I do
not remember exacly if two or tree more same size balls in order to replace
the original room occuped by the teeth and this rotator is actually running
without problems from several years now.
I hope this helps
73" de
i8CVS Domenico
------------------------------
Message: 8
Date: Wed, 11 Aug 2010 05:37:04 -0400
From: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>
Subject: [amsat-bb] G5500B Rotor Repair
To: <amsat-bb@xxxxx.xxx>
Message-ID: <9A37A41390E7453CA0EE90695363ED9D@xxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Dom,
I have the G5500B on the bench and it runs very smooth through the intire
rotation. It does travel 360 and to the 90 degree point and keeps rotating.
I think the limit switch on this end of rotation is defective. I will put it
under loaded condition and see if it hangs up. I will not put it back in
service without opening it up and checking it out. Thank you for your very
good explanation of the possible problem.
73, Andy
------------------------------
Message: 9
Date: Wed, 11 Aug 2010 13:33:39 -0400
From: Ron Overdrive <ronoverdrive@xxxxxxxx.xxx>
Subject: [amsat-bb] Sat Dishes and P3E Q's
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTimaqW1iAgjwx7gzOHYC0uhPaM2k=8td3WO=NePi@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I am curious how things are coming along with Phase 3 Express (P3E) as the
current official websites don't tell me much. The last bit of updates seem
to be from 2005 with an expected launch date of 2007 - 2008 which was 2 - 3
years ago. Since there's no info about it being active I'm guessing P3E
hasn't be launched yet.
The reason I'm asking is because I came across 2 Dish Network dishes that a
friend had sitting in his junk room that he acquired from the previous owner
of his home. One is a smaller dish labeled Dish 500 which I'm guessing is a
Ku-Band dish and a larger one labeled Dish Plus which I'm assuming is a
C-band dish. As you probably have guessed I want to use these for AMSAT work
and I don't know much about parabolic dishes so all I have are guesses for
what bands they work on so if anyone can point me in the right direction to
figure this out please do.
------------------------------
Message: 10
Date: Wed, 11 Aug 2010 14:23:50 -0400
From: "jmfranke" <jmfranke@xxx.xxx>
Subject: [amsat-bb] Re: Sat Dishes and P3E Q's
To: "Ron Overdrive" <ronoverdrive@xxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <1ED9D1276E8A4EC883531E6EC473CFBC@xxxxxx>
Content-Type: text/plain; format=flhe diameter or width of the dish and the
dish must have a suitable surface smoothness and accuracy. Without knowing
more, I suspect the two dishes will work for the 2.4 GHz through 10 GHz
bands. Of course, you will have to design and build suitable feeds for the
dishes. One of the best references is:
http://www.w1ghz.org/antbook/preface.htm
John WA4WDL
--------------------------------------------------
From: "Ron Overdrive" <ronoverdrive@xxxxxxxx.xxx>
Sent: Wednesday, August 11, 2010 1:33 PM
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Sat Dishes and P3E Q's
> I am curious how things are coming along with Phase 3 Express (P3E) as the
> current official websites don't tell me much. The last bit of updates seem
> to be from 2005 with an expected launch date of 2007 - 2008 which was 2 -
> 3
> years ago. Since there's no info about it being active I'm guessing P3E
> hasn't be launched yet.
>
> The reason I'm asking is because I came across 2 Dish Network dishes that
> a
> friend had sitting in his junk room that he acquired from the previous
> owner
> of his home. One is a smaller dish labeled Dish 500 which I'm guessing is
> a
> Ku-Band dish and a larger one labeled Dish Plus which I'm assuming is a
> C-band dish. As you probably have guessed I want to use these for AMSAT
> work
> and I don't know much about parabolic dishes so all I have are guesses for
> what bands they work on so if anyone can point me in the right direction
> to
> figure this out please do.
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 11
Date: Wed, 11 Aug 2010 20:33:18 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: G5500B Rotor Repair
To: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <000c01cb3983$ab3271e0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Andy, WA9WUA
The limit switches SW6 and SW7 are normally closed during the intire
rotation and opens only at 0? and 360?
If your rotator on the bench without the antenna vertical loading runs very
smooth through the entire rotation probably the torque is very weak under
mechanical antenna load because the AC electrolitic capacitor C 34 of
100 uF inside the rotator losted capacity.
Put the rotator into the grips of a vise .Slip a pipe into the boom tube and
while running the rotator try if you are able to stop it with the force of
both your hands.
If the capacitor is OK you must not be able to stop the rotation.Both limit
switches seems to be out of question.
Best 73" de
i8CVS Domenico
----- Original Message -----
From: "Andrew" <WA9WUA@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, August 11, 2010 11:37 AM
Subject: [amsat-bb] G5500B Rotor Repair
> Hi Dom,
> I have the G5500B on the bench and it runs very smooth through the intire
> rotation. It does travel 360 and to the 90 degree point and keeps
rotating.
> I think the limit switch on this end of rotation is defective. I will put
it
> under loaded condition and see if it hangs up. I will not put it back in
> service without opening it up and checking it out. Thank you for your very
> good explanation of the possible problem.
>
> 73, Andy
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Wed, 11 Aug 2010 20:48:36 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Sat Dishes and P3E Q's
To: "Ron Overdrive" <ronoverdrive@xxxxxxxx.xxx>, "AMSAT-BB"
<amsat-bb@xxxxx.xxx>
Message-ID: <001f01cb3985$cea451a0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Ron Overdrive" <ronoverdrive@xxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, August 11, 2010 7:33 PM
Subject: [amsat-bb] Sat Dishes and P3E Q's
> I am curious how things are coming along with Phase 3 Express (P3E) as the
> current official websites don't tell me much. The last bit of updates seem
> to be from 2005 with an expected launch date of 2007 - 2008 which was 2 -
3
> years ago. Since there's no info about it being active I'm guessing P3E
> hasn't be launched yet.
>
> The reason I'm asking is because I came across 2 Dish Network dishes that
a
> friend had sitting in his junk room that he acquired from the previous
owner
> of his home. One is a smaller dish labeled Dish 500 which I'm guessing is
a
> Ku-Band dish and a larger one labeled Dish Plus which I'm assuming is a
> C-band dish. As you probably have guessed I want to use these for AMSAT
work
> and I don't know much about parabolic dishes so all I have are guesses for
> what bands they work on so if anyone can point me in the right direction
to
> figure this out please do.
Hi Ron,
You don't mention wath is the diameter of your dishes and if they are prime
focus dishes or offset dishes.
By the way Ku-Band or C band dishes are good for P3E but in order to designe
the type of feed it is necessary to know the dish focus /diameter i.e the
F/D ratio.
For 2400 MHz on OSCAR-13 and AO40 I have used with good results a 4"
diameter prime focus dish with a F/D ratio of 0.45 and I plan to use the
same dish for P3E
73" de
i8CVS Domenico
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 5, Issue 337
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