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CX2SA > SATDIG 01.06.11 17:02l 880 Lines 27494 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Landwehr 70cm preamp device question? (i8cvs)
2. Re: SatPC32 & Yaesu FT-857 question (George Henry)
3. Re: Landwehr 70cm preamp device question? (Mark L. Hammond)
4. Flames on Endeavor (Kevin Deane)
5. Re: Flames on Endeavor (STeve Andre')
6. STS-134 Lands (Clint Bradford)
7. G5500 change voltage supply (Juan Antonio Fernandez)
8. Thrust bearing maintenance (Stephen E. Belter)
9. Re: [sarex] Re: ISS to be reboosted June 3rd (Alan P. Biddle)
10. Re: Thrust bearing maintenance (Stan, W1LE)
11. Re: Thrust bearing maintenance (Zachary Beougher)
12. AO51 (wa4hfn@xxxxxxx.xxxx
13. Re: Thrust bearing maintenance (Howard Kowall)
14. Re: Flames on Endeavor (Tom Azlin N4ZPT)
15. Re: Thrust bearing maintenance ((kp4tr)Ramon Gonzalez)
16. Re: G5500 change voltage supply (i8cvs)
17. Re: AO51 (Mark L. Hammond)
18. Re: Thrust bearing maintenance (Dee)
19. Re: G5500 change voltage supply (Dee)
----------------------------------------------------------------------
Message: 1
Date: Tue, 31 May 2011 21:49:58 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Landwehr 70cm preamp device question?
To: "Mark L. Hammond" <marklhammond@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <001201cc1fcb$ec256e80$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Sent: Tuesday, May 31, 2011 8:00 PM
Subject: [amsat-bb] Landwehr 70cm preamp device question?
> Hello All,
>
> I have an old Landwehr preamp that apparently uses the MGF1402 device
> (does that sound right?). It's not working so I presume it's the
> GaAsFET.
>
> Can the MGF1302 be substituted for the original MGF1402? Or can
> anybody recommend another device for the 70 cm Landwehr?
>
> I need to do something...
>
> Thanks in advance!
>
> --
> Mark L. Hammond [N8MH]
Hi Mark, N8MH
The MGF 14......types are MIL versions (Hi-Rel) of the MGF 13..... and
MGF 19..... and so "apparently" the MGF 1402 can be repleced by a
MGF 1302 with minor current adjustement for the lowest Noise Figure
By the way the MGF 1402 can be directly replaced by a ATF 26550
or MGF 1412 available at 9,30 Euro's from
http://www.rfmicrowave.it/catalogue.php?lang=eng
Look at the Catalog and then click over GaAsFET and FET
If you contact Franco Rota of the above rfmicrowave company I am
sure that he has few MGF 1402 at stock
You can pay it with credit card and get the GaAsFET in a few days
by regular post.
73" de
i8CVS Domenico
------------------------------
Message: 2
Date: Tue, 31 May 2011 14:19:38 -0700 (PDT)
From: George Henry <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: SatPC32 & Yaesu FT-857 question
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID: <660206.61388.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Exchanges are so rapid on Field Day that, except at TCA, it won't matter that
the uplink frequency doesn't update until you let off the PTT.
George, KA3HSW
----- Original Message ----
> From: Zachary Beougher <zack.kd8ksn@xxxxxxx.xxx>
> To: Ron Settle <settleron@xxxxxxx.xxx>; amsat-bb@xxxxx.xxx
> Sent: Tue, May 31, 2011 1:48:37 PM
> Subject: [amsat-bb] Re: SatPC32 & Yaesu FT-857 question
>
> That is what I am gathering, so it sounds like I am going to need to look
> for an uplink radio as well.
>
> This equipment is not for me - I am heading sat operations for Field Day,
so
> I am trying to get us on the linear birds for the event.
>
> Thanks for the responses!
>
> 73,
>
> Zack
> KD8KSN
>
------------------------------
Message: 3
Date: Tue, 31 May 2011 17:55:46 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Landwehr 70cm preamp device question?
To: "i8cvs" <domenico.i8cvs@xxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <qMvm1g00G56cfur05MvmZq@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Domenico,
Thank you very much for your advice and the data sheets. I had compared the
two data sheets and could not see why a substitution was a bad idea.
I appreciate the other part numbers and source recommendation, too!
73,
Mark N8MH
At 09:49 PM 5/31/2011 +0200, i8cvs wrote:
>----- Original Message -----
>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
>Sent: Tuesday, May 31, 2011 8:00 PM
>Subject: [amsat-bb] Landwehr 70cm preamp device question?
>
>> Hello All,
>>
>> I have an old Landwehr preamp that apparently uses the MGF1402 device
>> (does that sound right?). It's not working so I presume it's the
>> GaAsFET.
>>
>> Can the MGF1302 be substituted for the original MGF1402? Or can
>> anybody recommend another device for the 70 cm Landwehr?
>>
>> I need to do something...
>>
>> Thanks in advance!
>>
>> --
>> Mark L. Hammond [N8MH]
>
>Hi Mark, N8MH
>
>The MGF 14......types are MIL versions (Hi-Rel) of the MGF 13..... and
>MGF 19..... and so "apparently" the MGF 1402 can be repleced by a
>MGF 1302 with minor current adjustement for the lowest Noise Figure
>
>By the way the MGF 1402 can be directly replaced by a ATF 26550
>or MGF 1412 available at 9,30 Euro's from
>
>http://www.rfmicrowave.it/catalogue.php?lang=eng
>
>Look at the Catalog and then click over GaAsFET and FET
>
>If you contact Franco Rota of the above rfmicrowave company I am
>sure that he has few MGF 1402 at stock
>
>You can pay it with credit card and get the GaAsFET in a few days
>by regular post.
>
>73" de
>
>i8CVS Domenico
------------------------------
Message: 4
Date: Tue, 31 May 2011 23:48:17 -0700
From: Kevin Deane <summit496@xxxx.xxx>
Subject: [amsat-bb] Flames on Endeavor
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL107-W3582DAEA8C25323DDFAEE0837D0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Is that normal?? If anyone was watching that is...
Kevin
------------------------------
Message: 5
Date: Wed, 01 Jun 2011 03:06:32 -0400
From: "STeve Andre'" <andres@xxx.xxx>
Subject: [amsat-bb] Re: Flames on Endeavor
To: amsat-bb@xxxxx.xxx
Message-ID: <4DE5E4F8.4030603@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 06/01/11 02:48, Kevin Deane wrote:
>
>
> Is that normal?? If anyone was watching that is...
>
> Kevin
>
> _______________________________________________
> 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
>
Yes, it's the APU, I think.
--STeve Andre'
wb8wsf en72
------------------------------
Message: 6
Date: Wed, 01 Jun 2011 01:38:05 -0700
From: Clint Bradford <clintbradford@xx.xxx>
Subject: [amsat-bb] STS-134 Lands
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <67A73020-DCB7-42D9-B2E7-32665724F146@xx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
In case you missed it this morning, here's a few screenshots from NASA-TV of
the Endeavour after it landed.
http://tinyurl.com/STS-134-lands
Clint, K6LCS
------------------------------
Message: 7
Date: Wed, 1 Jun 2011 11:04:11 +0200
From: Juan Antonio Fernandez <ea4cyq@xxxxx.xxx>
Subject: [amsat-bb] G5500 change voltage supply
To: amsat-bb@xxxxx.xxx
Message-ID: <BANLkTi=QZ9TX3TnTMDjRPS=C1UBWxk6hvg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I have purchased a G5500. The control box have a 117Vac label in the real
panel. I opened it and a wire is connected through the fuse to the terminal
number 3 of the KT-30 transformer and the other wire through the main switch
to the terminal number 1 of the KT-30 transformer.
I am wondering how I should connect it to work with 220Vac in Europe.
Thanks in advance. ea4cyq@xxxxx.xxx
------------------------------
Message: 8
Date: Wed, 1 Jun 2011 08:19:51 -0400
From: "Stephen E. Belter" <seb@xxxxxx.xxx>
Subject: [amsat-bb] Thrust bearing maintenance
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<51668A33220E754EABE6583357ECEE2D6FF308FC@xxxxxxxx.xxxxxx.xxxxx>
Content-Type: text/plain; charset="us-ascii"
I have an Yaesu GS-050 thrust bearing that has been installed for about 15
years. The thrust bearing turns, but requires a lot of force.
I disassembled the thrust bearing to find that the grease is very sticky
(think candy apple sticky), and not lubricative (if that is a word).
Should I take it to an auto repair shop and ask them to degrease and then
lubricate similar to repacking a wheel bearing?
What kind of grease should be used?
Thanks and 73, Steve N9IP
--
Steve Belter
------------------------------
Message: 9
Date: Wed, 1 Jun 2011 07:07:50 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: [sarex] Re: ISS to be reboosted June 3rd
To: "'Justin Pinnix'" <justin@xxxxxxxxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <A4B9847AAE1149B6932AAAFCF62C4F87@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Justin,
Actually, the orbit is holding up pretty well for AO-51. The ISS is big
enough, and low enough, that drag is a significant factor. Drag is
_roughly_ 200 times higher for the ISS than AO-51. Even ARISSat-1, which
will start at the ISS orbit, will have a lifetime of much less than a year.
There is a good article on this in the latest AMSAT Journal.
What we really need is for the Energizer Bunny to stop by and swap out the
batteries. And while he is at it, he can stop by a couple of other
satellites and tap on them with a hammer to free up some stuck relays.
73s,
Alan
WA4SCA
-----Original Message-----
From: sarex-bounces@xxxxx.xxx [mailto:sarex-bounces@xxxxx.xxxx On Behalf Of
Justin Pinnix
Sent: Tuesday, May 31, 2011 8:41 AM
To: APBIDDLE@xxxxxxx.xxx
Cc: AMSAT-BB; SAREX-BB
Subject: [sarex] Re: [amsat-bb] ISS to be reboosted June 3rd
Do you think that if we asked real, real, nicely they'd go boost AO-51 for
us while they're up there? :-)
Just kidding - I know the reasons why this could never realistically be
done. But it does give me a great deal of appreciation for how reliable a
satellite can be when someone else is doing the stationkeeping work for us
who has resources beyond what we could ever imagine.
73 de AJ4MJ
On Tue, May 31, 2011 at 8:28 AM, Alan P. Biddle <APBIDDLE@xxxxxx.xxx> wrote:
> According to Roscosmos, the ISS will have its orbit raised 3.74 km Friday.
> This will result in a "slippage" of predicted times of approximately 70
> seconds per day until the Keps catch up. The AMSAT NASA.ALL Keps will
> probably not reflect this until next week, so be certain to update from
> Celstrak or Space Track.
>
> http://www.federalspace.ru/main.php?id=2&nid=11848&lang=en
>
> 73s,
>
> Alan
> WA4SCA
>
>
> _______________________________________________
> 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 sarex@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/sarex
------------------------------
Message: 10
Date: Wed, 01 Jun 2011 09:01:17 -0400
From: "Stan, W1LE" <stanw1le@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Thrust bearing maintenance
To: amsat-bb@xxxxx.xxx
Message-ID: <4DE6381D.2000702@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello Steve,
15 years outside in the weather is a long time. Options:
1. replace in kind with a new unit. Probably the most time effective and
cost effective approach.
The new one should last another 15+ years.
2. Soak the old unit in a solvent to loosen up all of the old grease and
flush dirt out.
Disassemble and inspect the bearings and bearing surfaces.
This unit is foreign made so all hardware is probably metric, as are
the ball bearings.
Clean each ball bearing and inspect for out of roundness and
pitting/corrosion.
How does each bearing roll on a hard surface ? Replace all pitted
bearings and all out of round.
Good luck finding metric bearings, Yes, they are out there. Maybe Yaesu
has a rebuild kit.
Inspect the bearing surfaces for gouging and other wear. Assemble with
all new parts.
Be sure to grease all of the hardware threads.
Do not expect the rebuilt old unit to be as mechanically tight as a new
unit.
Probably lots more sloppiness in the fit.
After rebuild, is there is any binding no matter how light, condemn the
unit.
As you can see, buying a new unit is the most cost effective and time
effective alternative.
I just replaced a ROHN TB3 thrust bearing on my main tower, with a new unit.
Good Luck with the project.
Stan, W1LE Cape Cod FN41sr
On 6/1/2011 8:19 AM, Stephen E. Belter wrote:
> I have an Yaesu GS-050 thrust bearing that has been installed for about 15
years. The thrust bearing turns, but requires a lot of force.
>
> I disassembled the thrust bearing to find that the grease is very sticky
(think candy apple sticky), and not lubricative (if that is a word).
>
> Should I take it to an auto repair shop and ask them to degrease and then
lubricate similar to repacking a wheel bearing?
>
> What kind of grease should be used?
>
> Thanks and 73, Steve N9IP
> --
> Steve Belter
>
>
>
> _______________________________________________
> 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, 1 Jun 2011 09:07:06 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Thrust bearing maintenance
To: "Stephen E. Belter" <seb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS19C0B8589CFE13914D75C3B37D0@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Steve,
I don't have any experience with rotors, but a car repair shop is going to
charge you an arm and a leg for something you can probably do yourself.
Go to AutoZone and pickup a can of heavy engine degreaser (the red can w/
orange lid is the good stuff). You can also pickup a can of wheel bearing
grease (should say that on the can), and use that to repack the bearing. If
you don't see the grease just ask one of the employees and show them what
you are using it on. You can also get this stuff at any store that carries
auto supplies.
Hope that helps...
73!
Zack
KD8KSN
-----Original Message-----
From: Stephen E. Belter
Sent: Wednesday, June 01, 2011 8:19 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Thrust bearing maintenance
I have an Yaesu GS-050 thrust bearing that has been installed for about 15
years. The thrust bearing turns, but requires a lot of force.
I disassembled the thrust bearing to find that the grease is very sticky
(think candy apple sticky), and not lubricative (if that is a word).
Should I take it to an auto repair shop and ask them to degrease and then
lubricate similar to repacking a wheel bearing?
What kind of grease should be used?
Thanks and 73, Steve N9IP
--
Steve Belter
_______________________________________________
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, 1 Jun 2011 13:14:30 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
Subject: [amsat-bb] AO51
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID:
<643503080.768501.1306934070663.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Did not hear AO51 this morning 12.13 utc 150/880?
WA4HFN em55
------------------------------
Message: 13
Date: Wed, 1 Jun 2011 08:16:58 -0500
From: "Howard Kowall" <hkowall@xxxx.xx>
Subject: [amsat-bb] Re: Thrust bearing maintenance
To: "Stephen E. Belter" <seb@xxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <01CB4ED13D534F57823652388A232037@xxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hello Steve
What I have done in the past
Is to degrease it all and before assembly,drill and tap grease nipples in
the housing,just make sure you clean all the filings before assembly.Then
for regular maintenance you just have to give them a small shot of grease
with a regular grease gun.
Just a suggestion
Good luck
Howard
VE4ISP
----- Original Message -----
From: "Stephen E. Belter" <seb@xxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, June 01, 2011 7:19 AM
Subject: [amsat-bb] Thrust bearing maintenance
>I have an Yaesu GS-050 thrust bearing that has been installed for about 15
>years. The thrust bearing turns, but requires a lot of force.
>
> I disassembled the thrust bearing to find that the grease is very sticky
> (think candy apple sticky), and not lubricative (if that is a word).
>
> Should I take it to an auto repair shop and ask them to degrease and then
> lubricate similar to repacking a wheel bearing?
>
> What kind of grease should be used?
>
> Thanks and 73, Steve N9IP
> --
> Steve Belter
>
>
>
> _______________________________________________
> 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: 14
Date: Wed, 01 Jun 2011 09:39:47 -0400
From: Tom Azlin N4ZPT <tom@xxxxx.xxx>
Subject: [amsat-bb] Re: Flames on Endeavor
To: amsat-bb@xxxxx.xxx
Message-ID: <4DE64123.60008@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Yes normal. Yes the APU. And seen on every single landing just daytime
landings looks like steam not flames. But the noise is the same either
way. 73,tom n4zpt
On 6/1/2011 2:48 AM, Kevin Deane wrote:
>
>
>
> Is that normal?? If anyone was watching that is...
>
> Kevin
------------------------------
Message: 15
Date: Wed, 1 Jun 2011 09:57:37 -0400
From: "(kp4tr)Ramon Gonzalez" <kp4tr.ramon@xxxxx.xxx>
Subject: [amsat-bb] Re: Thrust bearing maintenance
To: Zachary Beougher <zack.kd8ksn@xxxxxxx.xxx>
Cc: "<amsat-bb@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>, "Stephen E. Belter"
<seb@xxxxxx.xxx>
Message-ID: <F843B8B1-7AA1-48E5-9D8A-662EA18B8C0C@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I own this thrust bearing but imho it is not worth investing time and
material in such a low cost item. Get a new one and save yourself time.
Clean the old one and sell it on ebay as used.
Sent from my Adobe Flash and Java challenged iPhone
On Jun 1, 2011, at 9:07 AM, "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
wrote:
> Hi Steve,
>
> I don't have any experience with rotors, but a car repair shop is going to
> charge you an arm and a leg for something you can probably do yourself.
>
> Go to AutoZone and pickup a can of heavy engine degreaser (the red can w/
> orange lid is the good stuff). You can also pickup a can of wheel bearing
> grease (should say that on the can), and use that to repack the bearing. If
> you don't see the grease just ask one of the employees and show them what
> you are using it on. You can also get this stuff at any store that carries
> auto supplies.
>
> Hope that helps...
>
> 73!
>
> Zack
> KD8KSN
>
> -----Original Message-----
> From: Stephen E. Belter
> Sent: Wednesday, June 01, 2011 8:19 AM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Thrust bearing maintenance
>
> I have an Yaesu GS-050 thrust bearing that has been installed for about 15
> years. The thrust bearing turns, but requires a lot of force.
>
> I disassembled the thrust bearing to find that the grease is very sticky
> (think candy apple sticky), and not lubricative (if that is a word).
>
> Should I take it to an auto repair shop and ask them to degrease and then
> lubricate similar to repacking a wheel bearing?
>
> What kind of grease should be used?
>
> Thanks and 73, Steve N9IP
> --
> Steve Belter
>
>
>
> _______________________________________________
> 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: 16
Date: Wed, 1 Jun 2011 16:04:32 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: G5500 change voltage supply
To: "Juan Antonio Fernandez" <ea4cyq@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <000901cc2064$d5790b80$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Juan Antonio Fernandez" <ea4cyq@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, June 01, 2011 11:04 AM
Subject: [amsat-bb] G5500 change voltage supply
> I have purchased a G5500. The control box have a 117Vac label in the
> real panel. I opened it and a wire is connected through the fuse to the
> terminal number 3 of the KT-30 transformer and the other wire through the
> main switch to the terminal number 1 of the KT-30 transformer.
>
> I am wondering how I should connect it to work with 220Vac in Europe.
>
> Thanks in advance. ea4cyq@xxxxx.xxx
Hi Juan Antonio, EA4CYQ
Happy to hear from you again ! How many wires comes out from the primary
winding of the KT-30 transformer ?
If the primay winding of KT-30 transformer has only two wires the number
3 and the number 1 then it has been winded to work only with 117 Vac
and in this case you need an external autotransformer 220/117 to supply
the control box.
On the reversed side if the primary winding of the KT-30 transformer has
four wires it means that the primary has been made with two separate
windings of 117 Vac each so that is you connect two windings in parallel
you can supply it with 117 Vac and if you connect two windings in series
with the correct phase relationship you can supply it with 220 Vac
Best 73" de
i8CVS Domenico
------------------------------
Message: 17
Date: Wed, 1 Jun 2011 10:17:07 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: AO51
To: wa4hfn@xxxxxxx.xxx
Cc: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID: <BANLkTik6+e4SXmRqZKpf1KJW6jCCQnED8g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
It wasn't on.
Mark N8MH
On Wed, Jun 1, 2011 at 9:14 AM, <wa4hfn@xxxxxxx.xxx> wrote:
> Did not hear AO51 this morning 12.13 utc ? 150/880?
> WA4HFN em55
> _______________________________________________
> 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!
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--
Mark L. Hammond [N8MH]
------------------------------
Message: 18
Date: Wed, 01 Jun 2011 10:25:46 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Thrust bearing maintenance
To: "'Stephen E. Belter'" <seb@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <E22EEB6C11A24DC8A5768A69B19CEBA1@xxxxxxxx>
Content-Type: text/plain; charset=us-ascii
Steve,
I worked with bearings for many years as a Gyro overhauler and radar tech
for Sperry. The bearings I worked with were all high quality and close
tolerance. If you want to, you can remove the grease with a degreaser and
repack. Unless it was used constantly spinning, I don't think it could be
worn-Just weathered grease. If you go to an auto supply place, you will
find the wheelpacking high temp type and it will work fine. Replacing the
thrust bearing probably would be the best way to go. It shouldn't be bound
up at all and free to rotate. It IS supposed to support the mast to
alleviate pressure on the rotor.
Your call since you are doing this.
73,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Stephen E. Belter
Sent: Wednesday, June 01, 2011 8:20 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Thrust bearing maintenance
I have an Yaesu GS-050 thrust bearing that has been installed for about 15
years. The thrust bearing turns, but requires a lot of force.
I disassembled the thrust bearing to find that the grease is very sticky
(think candy apple sticky), and not lubricative (if that is a word).
Should I take it to an auto repair shop and ask them to degrease and then
lubricate similar to repacking a wheel bearing?
What kind of grease should be used?
Thanks and 73, Steve N9IP
--
Steve Belter
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Message: 19
Date: Wed, 01 Jun 2011 10:52:47 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: G5500 change voltage supply
To: "'Juan Antonio Fernandez'" <ea4cyq@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <7596C893812F406887BF17698889069F@xxxxxxxx>
Content-Type: text/plain; charset=us-ascii
I have both rotor manuals for G5500 -& G5400/5600 Yaesu units. The
schematics for both DO NOT show any wiring changes for the transformers to
work on 117VAC or 220VAC. The manuals do say that there are "Different"
transformers for 117 and 220 VAC use. It even states that they should be
returned to have the proper transformer installed if incorrect- This means
that there may not be a universal transformer installed and only wiring
changes to correct the AC input. Check with Yaesu for the correct
transformer part number required.
Good Luck,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Juan Antonio Fernandez
Sent: Wednesday, June 01, 2011 5:04 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G5500 change voltage supply
I have purchased a G5500. The control box have a 117Vac label in the real
panel. I opened it and a wire is connected through the fuse to the terminal
number 3 of the KT-30 transformer and the other wire through the main switch
to the terminal number 1 of the KT-30 transformer.
I am wondering how I should connect it to work with 220Vac in Europe.
Thanks in advance. ea4cyq@xxxxx.xxx
_______________________________________________
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Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
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http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 298
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