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Re: AMSAT-BB Digest, Vol 3, Issue 491



One suggestion I had posted some time ago for these rotors was to change the
bolts holding both halves together when the rotor is NEW and before it is
put up in use, to Allen head bolts.

The standard bolts with flat screwdriver heads become almost impossible to
remove once the ravages of weather have had their toll. The Allen head bolts
can be moved easily as the wrenches do not slip or damage the slots

Also if the end stop limit switches fail, the rotor drives the unit past the
stops ( which are just bent tabs on the mounting plate) and bends the whole
thing out of shape. I have had this happen twice.

Gopal Madhavan VU2GMN

"Shreyas" Apartments

128(old63) Greenways Road

Chennai - 600 028

 

Tel: 91 44 2493 7724 / 4230 3129

Mobile: 91 94440 18452

E-mail: gopal.madhavan@gmail.com


-----Original Message-----
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Sent: Monday, September 29, 2008 00:30
To: amsat-bb@amsat.org
Subject: AMSAT-BB Digest, Vol 3, Issue 491

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Today's Topics:

   1. Re: Kenpro elevation rotor repair (quadpugh@bellsouth.net)
   2. Re: Chinese bird (Nigel Gunn G8IFF/W8IFF)
   3. Re: Chinese bird (Nigel Gunn G8IFF/W8IFF)
   4.  Telemetry (Tim Tapio)
   5. Re: Chinese bird (Nigel Gunn G8IFF/W8IFF)
   6. Re: Chinese bird (Nigel Gunn G8IFF/W8IFF)
   7. Re: GO-32 off??? (Mark Ku7z)


----------------------------------------------------------------------

Message: 1
Date: Sun, 28 Sep 2008 11:24:24 +0000
From: quadpugh@bellsouth.net
Subject: [amsat-bb] Re: Kenpro elevation rotor repair
To: Roy <rdwelch@swbell.net>, Sangat Singh <sangatsingh@gmail.com>
Cc: AMSAT BB <AMSAT-BB@amsat.org>
Message-ID:
	
<092820081124.26404.48DF6967000719500000672422230682329B0A02D2089B9A019C0404
0A0DBF08099A9F0B0E9A9E@att.net>
	
Content-Type: text/plain




 
All

Here is my $.02. First smell the motor. If the motor has burnt windings
you  can smell them. mesureesure the resistance
between the winding. If the resistance beteen the winding is roughly
the same
suspect the capastor in the control box. If something mechanical has
failed a visually inspection will reveal it. There a lot of parts in
there but is faitly intutive on how to assemble them.


good luck

nickly


 

 -------------- Original message from Roy <rdwelch@swbell.net>:
--------------


> Hi Guys,
> 
> My two cents worth.  It looks like Sebastian has made all of the 
> checks.  I assume the rotor will not move in either direction.  It's 
> possible that something had fallen into the gear train, jamming the 
> works but it does sound more like a bad motor.  Have you measured all of 
> the voltages and especially the resistance values on the motor leads as 
> shown in the owner's manual?  If the resistances all look good and the 
> supply voltages are good then I would check the resistance from each 
> motor lead to the metal case to see if there is a short circuit to the 
> rotor housing.  I'm not sure but in some countries RFI hash protection 
> has been added to the rotor circuitry consisting of small RF chokes and 
> capacitors mounted inside the rotor case.  For example, my Emoto rotors 
> don't have it but the versions sold in some European countries do have 
> it.  You might check to see if there is a similar thing in your rotor 
> and that there are no failures there.  I doubt that this is the problem 
> however.  Good luck.
> 
> Roy -- W0SL
> 
> Sangat Singh wrote:
> > Sebastian,
> >
> > I had a similar problem. In my case I found that the 24 volt motor had 
> > packed up.  Since I had another Elevation Rotator with the faulty pot 
> > sitting on my bench for half a century,  I swapped the motor and it 
> > worked.  The motor is easily removed.  Please remove the 4 screws that 
> > hold the motor and then try powering up and see if the motor works.  I 
> > suppose you won't have a spare motor. I am trying to get the faulty 
> > motor rewired.  Our local talent can do wonderful things. 
> >
> > You might consult Roy Welch who has a great knowledge on ailing Yaesu 
> > rotators.  I am sure he has seen this mail and may have some valuable 
> > suggestions.  Do share your experience if you manage to fix this
problem.
> >
> > Opening nuts is a big problem and your Motor Cycle workshop should be 
> > able to help.  I got mine too opened that way.
> >
> > 73
> >
> > Sangat, 9M2SS 
> >
> > 2008/9/27 Sebastian >
> >
> >     Well I had been back on the birds for the last 3 months or so, and
> >     while I was getting ready for an AO-16 pass a few days ago, my
> >     elevation rotor on my Yaesu G-5400B stopped at about 10 degrees.
> >
> >     That's it.  It won't go back down or up.
> >
> >     So I checked the wiring on the rotor, everything appeared fine.  I
> >     removed the elevation rotor from the azimuthal, and took it inside.
I
> >     made a small patch cord to go from the control box to the rotor, but
> >     no luck.  All I get is the display of the elevation of about 10
> >     degrees, and I hear a little hum when I attempt to move it up or
> >     down.  This tells me that the potentiometer is probably good, and
the
> >     motor is receiving power.
> >
> >     I've removed the small nameplate on the side, and there is no water
> >     inside, and I can see the ball bears; there doesn't appear to be any
> >     rust inside.  I also removed the terminal assembly in case one of
the
> >     wire had come loose, or had a cold solder joint, but I didn't find
any
> >     problems there.  Looking at the diagram of the rotor, there appears
to
> >     only be a small 24 volt motor which turns this; along with numerous
> >     mechanical parts.
> >
> >     So the question is.  Before I send this to Yaesu, has anyone had
this
> >     problem before, is it a minor one (something that I could fix
myself),
> >     or is best left to Yaesu?  Before anyone mentions, Norm's no longer
> >     services these rotors.  The four 'screws' that hold the two parts
are
> >     impossible for me to loosen.  I would have to use a vice, but I do
> >     have a friend with a motorcycle repair business who I'm sure could
> >     open it for me in 60 seconds.  To me, this looks like a jigsaw
puzzle
> >     by looking at the diagram.
> >
> >     The rotor was in service for about a couple of years back in the
early
> >     90s.  It then sat inside without any use, up until a few months ago.
> >     If the consensus is to send it to Yaesu, should I bother to send in
> >     the azimuthal rotor, or should I follow the "don't fix it if it aint
> >     broken" rule?
> >     _______________________________________________
> >     Sent via AMSAT-BB@amsat.org . 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
> >
> >
> >
> >
> > -- 
> > Sangat Singh
> > 53, Jln. Perdana
> > National Planetarium
> > 50480 Kuala Lumpur (MALAYSIA)
> > Mobile: +60122838873
> > Office: +60322787388
> > FAX: +60322738873
> > Skype ID: sukhija
> 
> -- 
> Roy
> 
> _______________________________________________
> Sent via AMSAT-BB@amsat.org. 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: 2
Date: Sun, 28 Sep 2008 11:50:38 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@ngunn.net>
Subject: [amsat-bb] Re: Chinese bird
To: nigel@ngunn.net
Cc: AMSAT-BB <AMSAT-BB@amsat.org>
Message-ID: <48DF6F8E.1050109@ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

OBJECT A
1 33386U 08047A   08272.03157407  .00058856  00000-0  31878-3 0   148
2 33386 042.4039 178.9535 0005455 281.7900 281.1499 15.79165297   399
OBJECT B
1 33387U 08047B   08272.10851979  .00331787  82862-5  24665-3 0   157
2 33387 042.4056 177.9288 0091371 143.1653 350.9410 16.05709766   417
OBJECT C
1 33388U 08047C   08272.07164448  .05965914  79757-5  35793-2 0   165
2 33388 042.5635 178.2286 0132890 157.6146 335.5968 16.00603714   400
OBJECT D
1 33389U 08047D   08272.07101250  .05057167  78671-5  33535-2 0   155
2 33389 042.5304 178.4131 0159115 161.3630 282.7272 15.94264673   404


Nigel Gunn G8IFF/W8IFF wrote:
> OBJECT A
> 1 33386U 08047A   08270.86681241 +.00006639 +00000-0 +38759-4 0 00110
> 2 33386 042.4032 186.1321 0005349 274.8121 138.3688 15.79033427000219
> OBJECT B
> 1 33387U 08047B   08271.52535880  .00338329  82876-5  25603-3 0   137
> 2 33387 042.4057 181.6668 0092304 138.7422 220.4247 16.05330553   315
> OBJECT C
> 1 33388U 08047C   08271.81185072  .04662115  79977-5  29867-2 0   145
> 2 33388 042.5660 179.8746 0146387 155.4013 280.3695 15.97212014   364
> OBJECT D
> 1 33389U 08047D   08271.81719943  .04217493  78797-5  28598-2 0   139
> 2 33389 042.5336 180.0025 0171279 159.4172 267.2907 15.91528416   367
> 
> 
> Nigel Gunn G8IFF/W8IFF wrote:
>> OBJECT A
>> 1 33386U 08047A   08271.23698171 -.00000012  00000-0  00000+0 0   148
>> 2 33386 042.4022 183.8535 0005302 277.7711 082.3069 15.79028945   271
>> OBJECT B
>> 1 33387U 08047B   08270.85410193  .00235864  82914-5  18380-3 0    93
>> 2 33387 042.4052 185.9676 0093288 133.5629 301.8137 16.04840629   210
>> OBJECT C
>> 1 33388U 08047C   08270.87132440  .03977342  79208-5  33572-2 0    90
>> 2 33388 042.5672 185.7814 0174089 148.4949 287.3027 15.88486018   216
>> OBJECT D
>> 1 33389U 08047D   08270.87631317  .03720308  78109-5  31413-2 0    86
>> 2 33389 042.5345 185.8690 0197556 152.6409 289.9087 15.83619080   215
>>
>>
>> Nigel Gunn G8IFF/W8IFF wrote:
>>> OBJECT A
>>> 1 33386U 08047A   08270.86681241  .00006639  00000-0  38759-4 0   109
>>> 2 33386 042.4032 186.1321 0005349 274.8121 138.3688 15.79033427   219
>>> OBJECT B
>>> 1 33387U 08047B   08270.85410193  .00235864  82914-5  18380-3 0    93
>>> 2 33387 042.4052 185.9676 0093288 133.5629 301.8137 16.04840629   210
>>> OBJECT C
>>> 1 33388U 08047C   08270.87132440  .03977342  79208-5  33572-2 0    90
>>> 2 33388 042.5672 185.7814 0174089 148.4949 287.3027 15.88486018   216
>>> OBJECT D
>>> 1 33389U 08047D   08270.87631317  .03720308  78109-5  31413-2 0    86
>>> 2 33389 042.5345 185.8690 0197556 152.6409 289.9087 15.83619080   215
>>>
>>>
>>>
>>> Nigel Gunn G8IFF/W8IFF wrote:
>>>> Nobody going to disprove my suggeated keps?
>>>>
>>>> I suggest Object B might be carrying the men on the assumption that 
>>>> they would put it furthest from the debris items for safety.
>>>>
>>>> OBJECT A
>>>> 1 33386U 08047A   08270.68174498 -.00000905  00000-0 -22590-5 0    97
>>>> 2 33386 042.4032 187.2728 0005325 272.1577 167.6660 15.79022331   185
>>>> OBJECT B
>>>> 1 33387U 08047B   08270.56157778  .00436439  82806-5  34016-3 0    71
>>>> 2 33387 042.3979 187.8422 0093811 131.4805 051.7398 16.04686875   167
>>>> OBJECT C
>>>> 1 33388U 08047C   08270.68292241  .03975689  79036-5  35116-2 0    81
>>>> 2 33388 042.5675 186.9542 0178822 147.1161 290.4471 15.86989279   180
>>>> OBJECT D
>>>> 1 33389U 08047D   08270.68651225  .03790603  77941-5  32983-2 0    75
>>>> 2 33389 042.5365 187.0379 0202443 151.1578 288.4668 15.82251603   185
>>>>
>>>>
>>>> Nigel Gunn G8IFF/W8IFF wrote:
>>>>> OBJECT A
>>>>> 1 33386U 08047A   08270.18946997 -.00000490  00000-0  00000+0 0    64
>>>>> 2 33386 042.4031 190.3062 0005331 265.6039 252.3510 15.79021965   107
>>>>> OBJECT B
>>>>> 1 33387U 08047B   08270.13042824 -.00002624  82992-5  00000+0 0    40
>>>>> 2 33387 042.4069 190.5965 0095007 128.7569 080.7968 16.04298148    95
>>>>> OBJECT C
>>>>> 1 33388U 08047C   08270.25198260 -.00002549  80695-5  00000+0 0    66
>>>>> 2 33388 042.5811 189.6118 0191957 145.1394 349.9743 15.83071972   115
>>>>> OBJECT D
>>>>> 1 33389U 08047D   08270.25408649 -.00002516  79670-5  00000+0 0    56
>>>>> 2 33389 042.5439 189.6986 0215742 148.6792 347.2751 15.78503425   111
>>>>>
>>>>>
>>>>> Nigel Gunn G8IFF/W8IFF wrote:
>>>>>> Try one of these:
>>>>>
>>>>>
>>>>
>>>
>>
> 
> 


-- 
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF   W8IFF (was KC8NHF)
1865 El Camino Drive, Xenia, OH 45385-1115, USA   937 825 5032
e-mail nigel@ngunn.net             www  http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pig #385,
                   Dayton ARA #2128,  AMSAT-NA   LM-1691,  AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>


------------------------------

Message: 3
Date: Sun, 28 Sep 2008 12:01:39 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@ngunn.net>
Subject: [amsat-bb] Re: Chinese bird
To: nigel@ngunn.net
Cc: AMSAT-BB <AMSAT-BB@amsat.org>
Message-ID: <48DF7223.9060505@ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

We have 3 new objects this morning.
One will be the satellite they threw out, one might be the re-entry module,
any guesses on the third?

OBJECT A
1 33386U 08047A   08272.03157407  .00058856  00000-0  31878-3 0   148
2 33386 042.4039 178.9535 0005455 281.7900 281.1499 15.79165297   399
OBJECT B
1 33387U 08047B   08272.10851979  .00331787  82862-5  24665-3 0   157
2 33387 042.4056 177.9288 0091371 143.1653 350.9410 16.05709766   417
OBJECT C
1 33388U 08047C   08272.07164448  .05965914  79757-5  35793-2 0   165
2 33388 042.5635 178.2286 0132890 157.6146 335.5968 16.00603714   400
OBJECT D
1 33389U 08047D   08272.07101250  .05057167  78671-5  33535-2 0   155
2 33389 042.5304 178.4131 0159115 161.3630 282.7272 15.94264673   404
OBJECT E
1 33390U 08047E   08271.83351942  .03191372  77247-5  31858-2 0    20
2 33390 042.2872 180.6102 0210917 131.7480 299.3868 15.78884219   117
OBJECT F
1 33391U 08047F   08271.18885239  .02670637  76465-5  30734-2 0    17
2 33391 042.2455 184.6779 0229104 130.3664 231.7368 15.73363832    07
OBJECT G
1 33392U 08047G   08272.01633316 -.00014617  00000-0 -78040-4 0    31
2 33392 042.3990 179.0456 0007088 284.9410 190.4454 15.78718137    63


------------------------------

Message: 4
Date: Sun, 28 Sep 2008 08:22:00 -0400
From: "Tim Tapio" <tim@timtapio.com>
Subject: [amsat-bb]  Telemetry
To: <amsat-bb@amsat.org>
Message-ID: <004201c92164$cf57be10$6e073a30$@com>
Content-Type: text/plain;	charset="us-ascii"

Hello all!

 

Two questions on telemetry..

 

1.       I was considering dedicating a 70 cm "eggbeater" with a preamp as a
good, omni-directional antenna. So far though, it doesn't seem to pick up
below 12 degree elevations. Currently the preamp is in the shack (I know, at
the antenna) and my coax is not optimum. If I use heliax, put the preamp at
the antenna, is this feasible or should I plan on a steerable beam?

2.       I'm having a dickens of a time figuring out what the telemetry
frequencies are. I've looked at DK3WN's site which has the decoding software
but I seem to be having issues finding frequencies, am I looking in the
wrong places?

 

Thanks for your time!

 

73 de Tim, K4SHF FM04

 

 



------------------------------

Message: 5
Date: Sun, 28 Sep 2008 12:49:19 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@ngunn.net>
Subject: [amsat-bb] Re: Chinese bird
To: nigel@ngunn.net
Cc: AMSAT-BB <AMSAT-BB@amsat.org>
Message-ID: <48DF7D4F.5030805@ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I will summise that:
Object B was the original crew/payload module.
Object B then split into 3 induvidual parts to become Object F, the re-entry
module and Objects B and E are the propulsion module and crew module.
Object G is the satellite they ejected.
Objects A, C abd D are the rocket body and shields.

Diagram of the spacecraft here:
http://news.bbc.co.uk/2/hi/science/nature/7640301.stm



Nigel Gunn G8IFF/W8IFF wrote:
> We have 3 new objects this morning.
> One will be the satellite they threw out, one might be the re-entry 
> module, any guesses on the third?
> 
> OBJECT A
> 1 33386U 08047A   08272.03157407  .00058856  00000-0  31878-3 0   148
> 2 33386 042.4039 178.9535 0005455 281.7900 281.1499 15.79165297   399
> OBJECT B
> 1 33387U 08047B   08272.10851979  .00331787  82862-5  24665-3 0   157
> 2 33387 042.4056 177.9288 0091371 143.1653 350.9410 16.05709766   417
> OBJECT C
> 1 33388U 08047C   08272.07164448  .05965914  79757-5  35793-2 0   165
> 2 33388 042.5635 178.2286 0132890 157.6146 335.5968 16.00603714   400
> OBJECT D
> 1 33389U 08047D   08272.07101250  .05057167  78671-5  33535-2 0   155
> 2 33389 042.5304 178.4131 0159115 161.3630 282.7272 15.94264673   404
> OBJECT E
> 1 33390U 08047E   08271.83351942  .03191372  77247-5  31858-2 0    20
> 2 33390 042.2872 180.6102 0210917 131.7480 299.3868 15.78884219   117
> OBJECT F
> 1 33391U 08047F   08271.18885239  .02670637  76465-5  30734-2 0    17
> 2 33391 042.2455 184.6779 0229104 130.3664 231.7368 15.73363832    07
> OBJECT G
> 1 33392U 08047G   08272.01633316 -.00014617  00000-0 -78040-4 0    31
> 2 33392 042.3990 179.0456 0007088 284.9410 190.4454 15.78718137    63
> 


-- 
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF   W8IFF (was KC8NHF)
1865 El Camino Drive, Xenia, OH 45385-1115, USA   937 825 5032
e-mail nigel@ngunn.net             www  http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pig #385,
                   Dayton ARA #2128,  AMSAT-NA   LM-1691,  AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>


------------------------------

Message: 6
Date: Sun, 28 Sep 2008 13:11:37 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@ngunn.net>
Subject: [amsat-bb] Re: Chinese bird
To: nigel@ngunn.net
Cc: AMSAT-BB <AMSAT-BB@amsat.org>
Message-ID: <48DF8289.3070800@ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Nigel Gunn G8IFF/W8IFF wrote:
> I will summise that:
> Object B was the original crew/payload module.
> Object B then split into 3 induvidual parts to become Object F, the 
> re-entry module and Objects B and E are the propulsion module and crew 
> module.
> Object G is the satellite they ejected.
> Objects A, C abd D are the rocket body and shields.
> 
> Diagram of the spacecraft here:  
> http://news.bbc.co.uk/2/hi/science/nature/7640301.stm
> 
OBJECT A
1 33386U 08047A   08272.15013951  .00054573  00000-0  29582-3 0   158
2 33386 042.4044 178.2230 0005368 282.1563 235.6774 15.79173201   410
OBJECT B
1 33387U 08047B   08272.16951968  .00327953  82862-5  24351-3 0   165
2 33387 042.4059 177.5399 0091257 143.6493 343.5235 16.05744722   424
OBJECT C
1 33388U 08047C   08272.17342119  .06092444  79886-5  34811-2 0   173
2 33388 042.5636 177.5826 0129090 158.4658 202.1979 16.01883401   425
OBJECT D
1 33389U 08047D   08272.20443186  .05125418  78832-5  32475-2 0   164
2 33389 042.5303 177.5714 0154719 162.3890 328.7653 15.95657293   425
OBJECT E
1 33390U 08047E   08272.09102851  .03224960  77331-5  30760-2 0    38
2 33390 042.2824 179.0310 0205276 133.9838 323.5950 15.80599614   151
OBJECT F
1 33391U 08047F   08272.16573425  .02824282  76802-5  27876-2 0    23
2 33391 042.2418 178.6899 0210798 137.8851 014.7122 15.79041458   168
OBJECT G
1 33392U 08047G   08272.14808939  .00006963  00000-0  41046-4 0    40
2 33392 042.4041 178.2403 0007017 285.1879 219.9725 15.78732015    89


-- 
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Nigel A. Gunn. G8IFF   W8IFF (was KC8NHF)
1865 El Camino Drive, Xenia, OH 45385-1115, USA   937 825 5032
e-mail nigel@ngunn.net             www  http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pig #385,
                   Dayton ARA #2128,  AMSAT-NA   LM-1691,  AMSAT-UK, MKARS,
ALC
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>


------------------------------

Message: 7
Date: Sun, 28 Sep 2008 10:46:33 -0600
From: Mark Ku7z <ku7zdn41@gmail.com>
Subject: [amsat-bb] Re: GO-32 off???
To: Mineo Wakita <ei7m-wkt@asahi-net.or.jp>, AMSAT-BB@amsat.org
Message-ID: <48DFB4E9.7010409@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Nothing here either at 1645 utc.  Usually get headers if its reloading.

Mark, Ku7z
DN41


Mineo Wakita wrote:
> Nothing heard at 09:30UTC 28Sep2008 over Japan.
>
> JE9PEL, Mineo Wakita
>
> _______________________________________________
> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
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>   



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End of AMSAT-BB Digest, Vol 3, Issue 491
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