| |
CX2SA > SATDIG 23.09.10 15:55l 764 Lines 22986 Bytes #999 (0) @ WW
BID : AMSATBB5391
Read: GUEST
Subj: AMSAT-BB-digest V5 391
Path: IZ3LSV<IW0QNL<VE2PKT<F1BBI<CX2SA
Sent: 100923/1447Z @:CX2SA.LAV.URY.SA #:21376 [Minas] FBB7.00e $:AMSATBB5391
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Jan 09 sat passes (Zachary Beougher)
2. Re: ISS keps (Larry Gerhardstein)
3. Re: Jan 09 sat passes (Mike Rupprecht)
4. Re: Jan 09 sat passes (Mike Rupprecht)
5. Re: ISS keps (Patrick STODDARD (WD9EWK/VA7EWK))
6. Re: ISS keps (Patrick STODDARD (WD9EWK/VA7EWK))
7. Re: Jan 09 sat passes (George Henry)
8. Re: Jan 09 sat passes (George Henry)
9. Re: Jan 09 sat passes (Rick Tejera)
10. Re: Jan 09 sat passes (Tony Langdon)
11. Re: Jan 09 sat passes (w4upd)
12. Re: Jan 09 sat passes (Patrick STODDARD (WD9EWK/VA7EWK))
13. New Proposed Launch Date For Next Falcon 9 (B J)
14. Re: Antenna Opinions? (Greg D.)
15. Re: Antenna Opinions? (Greg D.)
16. Re: ISS keps (Ransom, Kenneth G. (JSC-OC)[BARRIOS TECHNOLOGY])
17. Fw: KR500 bearings (i8cvs)
----------------------------------------------------------------------
Message: 1
Date: Wed, 22 Sep 2010 16:24:21 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS17F8D23D4B7C5DAC00850FB3600@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
My impression of the 'simulate' feature of Orbitron was that it would
automatically retrieve the old keps..... At least it never gave the the
option of using the old. Maybe I imagined it better than it is. Could an
Orbitron guru correct me?
Zack
KD8KSN
--------------------------------------------------
From: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 11:15 AM
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
> But did you use keps from that time period? Today's keps won't work.
>
> On 22-Sep-10 14:26, Zachary Beougher wrote:
>> Frank,
>>
>> I simulated that time on Orbitron ( 06 January 2009, 20:20 UTC), and
>> according to Orbitron, neither AO27 or VO52 were over your QTH at the
>> time.
>> I am sending you the screenshot of that particular time via a different
>> email message.
>>
>> 73,
>>
>> Zack
>> KD8KSN
>>
> _______________________________________________
> 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: 2
Date: Wed, 22 Sep 2010 14:55:43 -0600
From: Larry Gerhardstein <W7IN@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ISS keps
To: amsat-bb@xxxxx.xxx
Message-ID: <4C9A6D4F.4060701@xxxxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I checked against http://iss.astroviewer.net/. Today issue is better,
however, still actual ISS posn about 100 miles ahead of SatPC32's
displayed posn. My computer clock is off by no more than 1 second. For
the clock to throw posn off by 100 miles, clock would need to be in
error by about 15 seconds.
Larry W7IN
On 9/20/2010 5:44 PM, Larry Gerhardstein wrote:
> Is there a special or alternate keps for ISS? Today I listened to
> NA1SS and when Col. Doug reported a QTH of North Dakota, my SatPC32 was
> displaying them at about Indiana. Still was able to copy them over my
> 12 degree hill when SatPC32 was reporting them over the Atlantic coast
> line. I had just done an update.
> _______________________________________________
> 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: Sat, 26 Sep 2009 23:10:59 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "'francesco messineo'" <francesco.messineo@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID: <001101ca3eed$e0a85560$a1f90020$@xx>
Content-Type: text/plain; charset="us-ascii"
Hi Frank,
I used the keps from January 2009 and set the PC clock to this date - it was
HAMSAT VO-52.
AO-7 was near Australia at this time.
73, Mike
DK3WN
--------------------------------------------------
From: "francesco messineo" <francesco.messineo@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 5:52 AM
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Jan 09 sat passes
> Hello all,
>
> I have a rather unusual question: can anyone tell me what satellite
> was visible over JM49MG around 20.20 UTC of 06 Jan 2009? I have in my
> log a contact via VO-52, but I received a QSL for that same contact
> via "AO-07 orbit 56249". I tried with my predict program but with
> current keps it gives result not meaningful for 06 January 2009.
> Thanks in advance
>
> Frank IZ8DWF
> _______________________________________________
> 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: Wed, 22 Sep 2010 23:14:53 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "'francesco messineo'" <francesco.messineo@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID: <001201cb5a9b$3d0c0620$b7241260$@xx>
Content-Type: text/plain; charset="us-ascii"
Hi Frank,
I used the keps from January 2009 and set the PC clock to this date - it was
HAMSAT VO-52.
AO-7 was near Australia at this time.
73, Mike
DK3WN
--------------------------------------------------
From: "francesco messineo" <francesco.messineo@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 5:52 AM
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Jan 09 sat passes
> Hello all,
>
> I have a rather unusual question: can anyone tell me what satellite
> was visible over JM49MG around 20.20 UTC of 06 Jan 2009? I have in my
> log a contact via VO-52, but I received a QSL for that same contact
> via "AO-07 orbit 56249". I tried with my predict program but with
> current keps it gives result not meaningful for 06 January 2009.
> Thanks in advance
>
> Frank IZ8DWF
> _______________________________________________
> 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: 5
Date: Wed, 22 Sep 2010 14:16:07 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: ISS keps
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinsaKZq=2J3tj5ZDPrOqREbqeSy0-ZuiX=tNwbz@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi!
> I checked against http://iss.astroviewer.net/. ?Today issue is better,
> however, still actual ISS posn about 100 miles ahead of SatPC32's displayed
> posn. ?My computer clock is off by no more than 1 second. ?For the clock to
> throw posn off by 100 miles, clock would need to be in error by about 15
> seconds.
Just create an account at http://www.space-track.org/ and download the keps
from there. I just logged into Space Track, and they have an ISS element
set that was updated at approximately 2053 UTC today (not long before I sent
this message).
Regardless of the freshness of the elements, it sometimes takes a
little bit before
after the ISS has a boost raising its orbit to where the keps are back
to being on
the mark.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 6
Date: Wed, 22 Sep 2010 14:18:08 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: ISS keps
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTikmNtKbPjEudzQ-VbtOn3DGxbAOWM8_dYTZBhsU@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
(after seeing weirdness in the message I sent, I will try it again so it looks
better)
> I checked against http://iss.astroviewer.net/. ?Today issue is better,
> however, still actual ISS posn about 100 miles ahead of SatPC32's displayed
> posn. ?My computer clock is off by no more than 1 second. ?For the clock to
> throw posn off by 100 miles, clock would need to be in error by about 15
> seconds.
Just create an account at http://www.space-track.org/ and download the keps
from there. I just logged into Space Track, and they have an ISS element
set that was updated at approximately 2053 UTC today (not long before I sent
this message).
Regardless of the freshness of the elements, it sometimes takes a little
bit after the ISS has a boost raising its orbit to where the keps are back
to being on the mark.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 7
Date: Wed, 22 Sep 2010 19:16:47 -0500
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "amsat bb" <amsat-bb@xxxxx.xxx>
Message-ID: <8AE5E2DC7A1642CD9548F65975C55892@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Which begs the question, where can one find archived keps? AMSAT does not
archive the KEPS mailing list, so unless someone on here is a subscriber and
has keps bulletins from that far back, where else can you look?
George, KA3HSW
----- Original Message -----
From: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 10:15 AM
Subject: [amsat-bb] Re: Jan 09 sat passes
> But did you use keps from that time period? Today's keps won't work.
>
[snip]
------------------------------
Message: 8
Date: Wed, 22 Sep 2010 19:19:27 -0500
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <C4BF900952A849CBAC2042206DCA625E@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
If it's like every other tracking program I've ever used, it overwrites the
old keps each time you update it. You're not given the option to use the
old ones because they're not there anymore.
George, KA3HSW
----- Original Message -----
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
To: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 3:24 PM
Subject: [amsat-bb] Re: Jan 09 sat passes
> My impression of the 'simulate' feature of Orbitron was that it would
> automatically retrieve the old keps..... Ating stuff.
73
Clear Skies
Rick Tejera
Editor SACnews,
Public Outreach Coordinator
Saguaro Astronomy Club
Phoenix, Arizona
www.saguaroastro.org
saguaroastro@xxx.xxx
K7TEJ
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of George Henry
Sent: Wednesday, September 22, 2010 17:17
To: amsat bb
Subject: [amsat-bb] Re: Jan 09 sat passes
Which begs the question, where can one find archived keps? AMSAT does not
archive the KEPS mailing list, so unless someone on here is a subscriber and
has keps bulletins from that far back, where else can you look?
George, KA3HSW
----- Original Message -----
From: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, September 22, 2010 10:15 AM
Subject: [amsat-bb] Re: Jan 09 sat passes
> But did you use keps from that time period? Today's keps won't work.
>
[snip]
_______________________________________________
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: 10
Date: Thu, 23 Sep 2010 10:37:09 +1000
From: Tony Langdon <vk3jed@xxxxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: "George Henry" <ka3hsw@xxx.xxx>, "amsat bb" <amsat-bb@xxxxx.xxx>
Message-ID: <4c9aa141.e67cdc0a.2977.0785@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 10:16 AM 9/23/2010, George Henry wrote:
>Which begs the question, where can one find archived keps? AMSAT does not
>archive the KEPS mailing list, so unless someone on here is a subscriber and
>has keps bulletins from that far back, where else can you look?
Aa a matter of fact, I have Keps going back several years, because I
tend to archive my mail. Might be useful for historical studies like
the one in this thread.
73 de VK3JED / VK3IRL
http://vkradio.com
------------------------------
Message: 11
Date: Wed, 22 Sep 2010 20:41:51 -0400
From: w4upd <updwrb@xxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Jan 09 sat passes
To: George Henry <ka3hsw@xxx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>
Message-ID: <4C9AA24F.6020606@xxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
If someone needs them, I have keps from 2005 up to recent. I have ARRL
keps starting with March of 2005 and Amsat starting with April of 2005.
Regards,
Reid, W4UPD
George Henry wrote:
> Which begs the question, where can one find archived keps? AMSAT does not
> archive the KEPS mailing list, so unless someone on here is a subscriber and
> has keps bulletins from that far back, where else can you look?
>
> George, KA3HSW
>
>
>
> ----- Original Message -----
by satellite number,
then specify the date or date range instead of taking the latest set or the
last 5 sets. Very useful for something like this.
If you are interested in the AMSAT sets specifically, or don't want to sign
up for a Space Track account, the weekly sets from the AMSAT KEPS
list are archived since August 2006 when AMSAT moved to new mailing-
list software. Go to:
http://amsat.org/pipermail/keps/
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 13
Date: Wed, 22 Sep 2010 19:24:18 -0700 (PDT)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb] New Proposed Launch Date For Next Falcon 9
To: amsat-bb@xxxxx.xxx
Message-ID: <23949.11314.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
http://www.spacenews.com/launch/100922-spacex-targets-november-dragon.html
The mission profile looks quite ambitious this time. The Dragon spacecraft
is supposed to orbit, re-enter, and splash down.
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 14
Date: Wed, 22 Sep 2010 21:39:50 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Antenna Opinions?
To: <stanw1le@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <BLU133-W26AD017A568078E9A705B2A9610@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Stan,
No, it's for sure not an M2. The boom is about 9' or 10' long, and the
driven element is a simple dipole. The reflector element in the back is
split, with two dipoles, one above and one below the boom. Coax connector
is at the rear of the boom.
The pointiness of the antenna is not too bad. My rotor is good to 6 degrees
(that's the clicker increment), and the one beacon I can barely hear way off
in the distance can be heard +/- about 2 clicks.
Greg KO6TH
> Date: Wed, 22 Sep 2010 08:50:05 -0400
> From: stanw1le@xxxxxxx.xxx
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: Antenna Opinions?
>
> M2 makes a 35 element 1296 MHz yagi, on about a 6' boom.
> individual elements are insulated "thru the boom" with keepers.
> Folded dipole driven element.
> I used 2 each stacked vertically for AO-40. Yes, they are pointy.
>
> Stan, W1LE Cape Cod FN41sr
>
>
>
> On 9/22/2010 1:52 AM, Art McBride wrote:
> > Greg,
> > I would keep the one that works the best.
> > I have been disappointed in the performance of long boom Yagi's for UHF.
> > Resistance loss in the elements often reduces the gain by several dB over
> > calculated gain. Also they are very narrow band, the helix is good for an
> > octave.
> > Art,
> > KC6UQH
> > --
>
> _______________________________________________
> 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 prothe circular polarization.
In terrestrial work, I lose 3db going circular to linear, so the net
difference is going to be about 6dB. Not trivial, but not "wow" either.
The helix is a lot smaller of an antenna, too, thinking of wind load and such.
Greg KO6TH
> From: domenico.i8cvs@xxx.xx
> To: ko6th_greg@xxxxxxx.xxxx amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] Antenna Opinions?
> Date: Wed, 22 Sep 2010 15:17:15 +0200
>
> ----- Original Message -----
> From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, September 22, 2010 7:03 AM
> Subject: [amsat-bb] Antenna Opinions?
>
>
> >
> > Hi folks,
> >
> >
> > The Find was a 35 element 1296mHz antenna, well built and in excellent
> condition. Linearly polarized, horizontal; supposed to be 23dBi gain.
> Manufacturer, of course, is unknown. No markings, but it does not look
> home-built. By the mounting hardware, it looks like it was part of some
> sort of stacked array.
> >
> >
> > Thanks,
> >
> > Greg KO6TH
> >
>
> Hi Greg, KO6TH
>
> If your antenna is from Tonna it must be 3,07 meters long.
>
> Tonna make two models one for DX and SAT and the other one for ATV
> By the way the gain is 20 dB isotropic.
>
> 20635 35 ELEMENTI 1260/1300 MHz dx,sat 20 dB 3,07 meters long
>
> 20636 35 ELEMENTI 1250/1260 MHz ATV 20 dB 3,07 meters long
>
> 73" de
>
> i8CVS Domenico
>
>
------------------------------
Message: 16
Date: Thu, 23 Sep 2010 07:05:24 -0500
From: "Ransom, Kenneth G. (JSC-OC)[BARRIOS TECHNOLOGY]"
<kenneth.g.ransom@xxxx.xxx>
Subject: [amsat-bb] Re: ISS keps
To: "amsat-bb@xxxxxx.xxxx <amsat-bb@xxxxxx.xxx>, "amsat-bb@xxxxx.xxxx
<amsat-bb@xxxxx.xxx>
Message-ID:
<CBB2346C58D9B14983E5AEFE4B3458867C57F8F803@xxxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
The ISS did some thruster tests recently. That could account for the
difference. ISS is a dynamic satellite. It has minor and major changes to
its orbit and the "predicts" are sometime a bit behind the actual until
things fall into a more stable state and get updated. I expect the numbers
will be off again after the Soyuz undock today (tomorrow UTC).
Kenneth - N5VHO
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Patrick STODDARD (WD9EWK/VA7EWK)
Sent: Wednesday, September 22, 2010 4:18 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: ISS keps
(after seeing weirdness in the message I sent, I will try it again so it looks
better)
> I checked against http://iss.astroviewer.net/. ?Today issue is better,
> however, still actual ISS posn about 100 miles ahead of SatPC32's displayed
> posn. ?My computer clock is off by no more than 1 second. ?For the clock to
> throw posn off by 100 miles, clock would need to be in error by about 15
> seconds.
Just create an account at http://www.space-track.org/ and download the keps
from there. I just logged into Space Track, and they have an ISS element
set that was updated at approximately 2053 UTC today (not long before I sent
this message).
Regardless of the freshness of the elements, it sometimes takes a little
bit after the ISS has a boost raising its orbit to where the keps are back
to being on the mark.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
_______________________________________________
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: 17
Date: Thu, 23 Sep 2010 16:43:20 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Fw: KR500 bearings
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <001201cb5b2d$ab225140$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="utf-8"
Hi Bob W7LRD
My previous message to you via w7lrd@xxxxxxx.xxx was rejected to me !
73" de
i8CVS Domenico
----- Original Message -----
From: i8cvs
To: Bob- W7LRD
Sent: Thursday, September 23, 2010 4:36 PM
Subject: Re: [amsat-bb] KR500 bearings
----- Original Message -----
From: Bob- W7LRD
To: i8cvs
Sent: Thursday, September 23, 2010 1:13 AM
the gear back to the pot shaft when I can get the
pot in the right location. I don't want to accidently run to rotor and keep
going at the end of the pot.
The original 500 ohm pot can rotate all around for more than 360 degrees
and the center pot wiper of the new model of rotators has a flexible wire
outside the case of the pot to provide a safe contact inside of it !
73 Bob W7LRD
Best 73" de
i8CVS Domenico
----- Original Message -----
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Bob- W7LRD" <w7lrd@xxxxxxx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Sent: Tuesday, September 21, 2010 8:26:11 AM
Subject: Re: [amsat-bb] KR500 bearings
----- Original Message -----
From: "Bob- W7LRD" <w7lrd@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Tuesday, September 21, 2010 1:54 AM
Subject: [amsat-bb] KR500 bearings
>
>
> Hi-I am looking for a supplier of bearings and the support for them for
the KR500 el rotor. I called Vertex and they're not sure if the bearings are
the same as the current 5400/5500 series. The Kenpro product line is no
longer in production.
>
> 73 Bob W7LRD
>
> Seattle
Hi Bob, W7LRD
The diameter of each ball for the bearing of a KR500 is 0.312" or 5 / 16
inch
or 7.9375 mm. I suggest you to remove both stainless steel bearing holders
throw it away and add 2 or 3 more balls in each bearing in order to replace
the room of the holders teeth. I did it but I do not remember exactly if I
added 2 or 3 more balls. Fill the bearing wrinkles of the rotor housing with
black dense molibdene grease and pull the balls in it.It works very well for
me from many years now.
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 391
****************************************
Read previous mail | Read next mail
| |
