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CX2SA > SATDIG 27.09.08 21:10l 284 Lines 11734 Bytes #999 (0) @ WW
BID : 36694_CX2SA
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Subj: AMSAT-BB-digest V3 489
Path: IZ3LSV<IK2XDE<F5GOV<F4BWT<F1BBI<CX2SA
Sent: 080927/1905Z @:CX2SA.LAV.URY.SA #:36694 [Minas] FBB7.00e $:36694_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Kenpro elevation rotor repair (David Smith)
2. Yaesu G-600X Rotator (Eric Christensen)
3. Re: Kenpro elevation rotor repair (Sangat Singh)
4. Re: Kenpro elevation rotor repair, Sebastian - W4AS (John Kopala)
----------------------------------------------------------------------
Message: 1
Date: Sat, 27 Sep 2008 09:10:30 -0700
From: "David Smith" <w6te(AT)msn.com>
Subject: [amsat-bb] Re: Kenpro elevation rotor repair
To: "AMSAT BB" <AMSAT-BB(AT)amsat.org>, "Sebastian" <w4as(AT)bellsouth.net>
Message-ID: <BAY110-DS500C3C065DE40425B5F8895460(AT)phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
Hello Sebastian,
I would send it to Larry, K6VLF. Larry has parts for these rotors and gets
them out very fast and does a great job in overhauling them..
73,
Dave / W6TE
----- Original Message -----
From: Sebastian<mailto:w4as(AT)bellsouth.net>
To: AMSAT BB<mailto:AMSAT-BB(AT)amsat.org>
Sent: Saturday, September 27, 2008 8:01 AM
Subject: [amsat-bb] Kenpro elevation rotor repair
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?
------------------------------
Message: 2
Date: Sat, 27 Sep 2008 12:17:45 -0400
From: Eric Christensen <eric(AT)christensenplace.us>
Subject: [amsat-bb] Yaesu G-600X Rotator
To: AMSAT-BB(AT)amsat.org
Message-ID: <48DE5CA9.1010907(AT)christensenplace.us>
Content-Type: text/plain; charset=ISO-8859-1
And on the topic of rotators...
I bought a Yaesu G-600X a few months back and never messed with it. Now
I'm ready to put it up but I need a pole mount for it. Of course none
of my usual dealers still have this rotator so it is going to be a
little difficult. Does anyone know if I can just use the pole mount
from a G-800 rotator? Does anyone happen to have a pole mount for a
G-600X laying around that they'd like to sell?
73,
Eric Christensen, W4OTN
AMSAT Area Coordinator - Southeastern Virginia USA
AMSAT Member 35360
http://www.ericsatcom.net
GPG Key Fingerprint: 4395 EF8D DDFF E681 26CB 7165 2F95 7CC9 D749 08ED
------------------------------
Message: 3
Date: Sun, 28 Sep 2008 00:38:00 +0800
From: "Sangat Singh" <sangatsingh(AT)gmail.com>
Subject: [amsat-bb] Re: Kenpro elevation rotor repair
To: Sebastian <w4as(AT)bellsouth.net>
Cc: AMSAT BB <AMSAT-BB(AT)amsat.org>, Roy Welch <rdwelch(AT)swbell.net>
Message-ID:
<75d434300809270938p168be53bna3c4dd34938316dc(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
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 <w4as(AT)bellsouth.net>
> 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(AT)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
------------------------------
Message: 4
Date: Sat, 27 Sep 2008 11:11:08 -0700
From: "John Kopala" <jkopala(AT)gmail.com>
Subject: [amsat-bb] Re: Kenpro elevation rotor repair, Sebastian -
W4AS
To: <amsat-bb(AT)amsat.org>, "Sebastian" <w4as(AT)bellsouth.net>
Message-ID: <B0EED74E806F49A5A402446A852C8613(AT)sierrap4dual>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Sebastian,
The motors in these rotors use a RUN Capacitor which provides a phase shift
to one set of the motor windings and produce a rotating magnetic field.
When the run capacitor goes bad, you get the symptoms that your are
describing. Then the motor hums but doesn't run in either direction. With
the G-5400B, the azimuth cap is in the controller and the elevation cap is
in the rotor. In any case, check the circuit for the nominal 24V AC between
terminals 6 and 4 and then between 6 and 5 with either Down or Up selected.
If there is voltage present on both terminals 4 and 5 referenced to terminal
6, then at least the cap is NOT open. But it may still be shorted. Check
the resistance of the rotor between terminals 4 and 5. It should read about
5 ohms if the cap is not shorted. You will have to open the rotor to get at
the cap to do further testing or to replace it.
An extra side note. Yaesu has moved caps from the controllers to the
rotors. So the G-400, G-500, G-5400B, G-5600B, and G-5500 rotors and
control boxes are not interchangeable. With the G-5500 and G-5600B, both
caps are in rotors. With the G5400B only the elevation rotor has the run
cap in it. With other models, the caps are in the controllers.
Good luck,
John
N7JK
> From: Sebastian <w4as(AT)bellsouth.net>
> Subject: [amsat-bb] Kenpro elevation rotor repair
>
> 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(AT)amsat.org. 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 3, Issue 489
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