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CX2SA > SATDIG 27.03.18 19:41l 755 Lines 28198 Bytes #999 (0) @ WW
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Sent: 180327/1731Z @:CX2SA.SAL.URY.SOAM #:38766 [Salto] FBB7.00e $:AMSATBB13116
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. AO73/FUNcube-1 Operations (Graham Shirville)
2. Re: M2 432 polarity switch (Zach Leffke)
3. AMSAT-UK Colloquium Call for Speakers (David Johnson)
4. Re: M2 432 polarity switch (on4cjq@???????.???
5. 2018 symposium? (w4upd)
6. Re: 2018 symposium? (Paul Stoetzer)
7. Re: M2 432 polarity switch (Jean Marc Momple)
8. Re: M2 432 polarity switch (on4cjq@???????.???
9. Raleigh NC hamfest, March 31 (Philip Jenkins)
10. another rotator question (Rolf Krogstad)
11. Re: another rotator question (Mike Thompson)
12. Re: another rotator question (Rolf Krogstad)
13. Re: another rotator question (Mike Thompson)
----------------------------------------------------------------------
Message: 1
Date: Mon, 26 Mar 2018 09:07:40 +0100
From: Graham Shirville <g.shirville@??????????.???>
To: AMSAT <amsat-bb@?????.???>, "funcube@???????????.??.???
<funcube@???????????.??.??>
Subject: [amsat-bb] AO73/FUNcube-1 Operations
Message-ID: <ad794223-a42d-da36-c36a-beb9a7ec8e59@??????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
Hi All,
AO73 is now seeing short eclipse periods of around 15 minutes every
orbit. The spacecraft is now operating in autonomous mode. ie: full
power tlm when in the sun and with the transponder on when in eclipse.
The transponder will be switched to continuous operation on Thursday
morning.
Have fun
73
Graham
G3VZV
------------------------------
Message: 2
Date: Mon, 26 Mar 2018 10:24:52 -0400
From: Zach Leffke <zleffke@??.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] M2 432 polarity switch
Message-ID: <bdbac8c8-63ab-49d5-aaa6-c20576ab0412@??.???>
Content-Type: text/plain; charset=utf-8; format=flowed
We use the M2 polarity switches in the VTGS for both our 70cm and 2m
antennas.
In my experience they work very well.? I have not conducted any critical
analysis of their performance (Axial ratio measurements and the like),
but I can say they are sturdy and solid and in the few years we've had
them 'on the tower' I have had no problems with defects or failures (no
water ingress or anything like that).? Anecdotally, I will say that
being able to switch polarizations mid-pass has been of huge benefit,
and you can definitely see a difference in signal strength (depending on
the satellite, its antennas, geometry, etc.).
So generally, I highly recommend the M2 products for this, if you can
afford it.? I also use the M2 antennas personally, but can't afford the
polarization switches for myself for my home setup.
If you are looking for DIY / cheaper alternatives, The ARRL Antenna
Handbook has some good 'schemes' for polarization switching.? Depending
on how you tackle the problem you may need access to either 75 or 100
Ohm coax for the phasing (I recommend www.therfc.com for this, he has
all kinds of cable and may even fabricate some phase aligned ones for
you if you ask nicely). Most of those schemes require some type of coax
relay, but you might be able to find something relatively cheap on
ebay.? Also, you can find a good article on using Omron PCB relays for
RF work here, if you would like to attempt to 'build' a coax relay:
https://www.w6pql.com/using_inexpensive_relays.htm.
Hope this helps! Goodluck!
-Zach, KJ4QLP
Research Associate
Aerospace Systems Lab
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
On 3/25/2018 9:58 AM, WB8PFZ via AMSAT-BB wrote:
> M2 sells a driven element assembly that allows polarity switching for
there 435 antennas. Has any one used this product and can comment? Is there
a cheaper way to do this? Thanks Mike
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Mon, 26 Mar 2018 16:20:23 +0000
From: David Johnson <dave@?????.??.??>
To: amsat-bb <amsat-bb@?????.???>
Subject: [amsat-bb] AMSAT-UK Colloquium Call for Speakers
Message-ID: <205744A5-AEEB-488C-A606-FAECF5E86D14@?????.??.??>
Content-Type: text/plain; charset=us-ascii
This is a call for speakers for the AMSAT-UK International Space Colloquium
2018 which, will be held this year on 13-14 October, in conjunction with the
RSGB Convention at Kents Hill Park Conference Centre, Milton Keynes, MK7
6BZ, United Kingdom .
AMSAT-UK invites speakers, to cover topics about Amateur satellites,
CubeSats, Nanosats, space and associated activities, for this event.
They are also invited to submit papers for subsequent publishing on the
AMSAT-UK web site or in Oscar News.
We appreciate that it is not always possible to give a firm indication of
attendance at this stage but expressions of interest would be appreciated.
Submissions should be sent via e-mail to: dave@?????.??.??
AMSAT-UK also invite anyone with requests for Program Topics to submit them
as soon as possible to G4DPZ. Invitations for any papers on specific
subjects will be included in the future call. Likewise if anyone knows of a
good speaker, please send contact and other information to G4DPZ.
73
Dave, G4DPZ
On behalf of the AMSAT-UK Committee
------------------------------
Message: 4
Date: Mon, 26 Mar 2018 18:39:48 +0200 (CEST)
From: on4cjq@???????.??
To: mikflathead@???.???
Cc: amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] M2 432 polarity switch
Message-ID:
<1310340084.219287259.1522082388296.JavaMail.zimbra@???????.??>
Content-Type: text/plain; charset=utf-8
Hello Mike
there is a much cheaper way!! M? is good but VERY pricy.
just put a tohtsu cx-120A or CX-140 coaxrelay in a box, a folded dipole and
a 1/2 coax balun. The relay has 2 connections at 1 side and 1 connection at
the other side.
the one side with the 2 connections: connect each side of the folded dipole
to either relay contact, the side with the 1 relay-conection is for the
feeder to trx.
i made this for 2m and 70cm crossyagis, and works FB for switching from RHCP
to LHCP.
the price for the relay cx-120: 37.50? , a small plastic box: a few
?'s....the price for the M?'s: multiply by 7 or 8
best 73's
Jerry,ON4CJQ
----- Oorspronkelijk bericht -----
Van: "amsat-bb" <amsat-bb@?????.???>
Aan: "amsat-bb" <amsat-bb@?????.???>
Verzonden: Zondag 25 maart 2018 15:58:45
Onderwerp: [amsat-bb] M2 432 polarity switch
M2 sells a driven element assembly that allows polarity switching for there
435 antennas. Has any one used this product and can comment? Is there a
cheaper way to do this? Thanks Mike
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Mon, 26 Mar 2018 12:45:52 -0400
From: w4upd <w4upd@???.??.???>
To: amsat-bb <AMSAT-BB@?????.???>
Subject: [amsat-bb] 2018 symposium?
Message-ID: <5AB923C0.4060102@???.??.???>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Any idea of when and where the 2018 Symposium is going to be? The Amsat
website still shows 2017.
Reid, W4UPD
------------------------------
Message: 6
Date: Mon, 26 Mar 2018 12:59:59 -0400
From: Paul Stoetzer <n8hm@????.???>
To: w4upd <w4upd@???.??.???>
Cc: amsat-bb <AMSAT-BB@?????.???>
Subject: Re: [amsat-bb] 2018 symposium?
Message-ID:
<CABzOSOqd+Dx0yghc4PRd_KR6nU-yMvBxMEzfLQiwpAAvhLZ3fQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
We hope to have an announcement very soon!
73,
Paul, N8HM
On Mon, Mar 26, 2018 at 12:45 PM, w4upd <w4upd@???.??.???> wrote:
> Any idea of when and where the 2018 Symposium is going to be? The Amsat
> website still shows 2017.
>
> Reid, W4UPD
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Mon, 26 Mar 2018 22:14:38 +0400
From: Jean Marc Momple <jean.marc.momple@?????.???>
To: on4cjq@???????.??
Cc: mikflathead@???.???? amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] M2 432 polarity switch
Message-ID: <4118FA3F-84D8-437D-A750-6CD64B77B868@?????.???>
Content-Type: text/plain; charset=utf-8
Good Evening,
I again believe that I need to provide some feedback on the polarization
issue.
In one using polarized antenna RHCP or LHCP it is quite obvious that one
should be able to change the polarization when working the birds. The most
evident example is AO-92, whereby you have to change same every minute or so
to keep a constant Rx signal strength, this both on the uplink and downlink.
It may be due to the spinning of the satellite which may have a higher rate
than usual, AO-91 is much more stable on this aspect.
Whatever system you may be using to change the polarization is your own
choice, what I wanted to stress is that for 100% reliability you need to be
able to do so on both the uplink and downlink.
73
Jean Marc (3B8DU)
> On Mar 26, 2018, at 8:39 PM, on4cjq@???????.?? wrote:
>
> Hello Mike
>
> there is a much cheaper way!! M? is good but VERY pricy.
> just put a tohtsu cx-120A or CX-140 coaxrelay in a box, a folded dipole
and a 1/2 coax balun. The relay has 2 connections at 1 side and 1 connection
at the other side.
> the one side with the 2 connections: connect each side of the folded
dipole to either relay contact, the side with the 1 relay-conection is for
the feeder to trx.
> i made this for 2m and 70cm crossyagis, and works FB for switching from
RHCP to LHCP.
> the price for the relay cx-120: 37.50? , a small plastic box: a few
?'s....the price for the M?'s: multiply by 7 or 8
>
> best 73's
>
> Jerry,ON4CJQ
>
> ----- Oorspronkelijk bericht -----
> Van: "amsat-bb" <amsat-bb@?????.???>
> Aan: "amsat-bb" <amsat-bb@?????.???>
> Verzonden: Zondag 25 maart 2018 15:58:45
> Onderwerp: [amsat-bb] M2 432 polarity switch
>
> M2 sells a driven element assembly that allows polarity switching for
there 435 antennas. Has any one used this product and can comment? Is there
a cheaper way to do this? Thanks Mike
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Mon, 26 Mar 2018 20:34:53 +0200 (CEST)
From: on4cjq@???????.??
To: Jean Marc Momple <jean.marc.momple@?????.???>
Cc: mikflathead <mikflathead@???.???>, amsat-bb <amsat-bb@?????.???>
Subject: Re: [amsat-bb] M2 432 polarity switch
Message-ID:
<1235990212.219655245.1522089293321.JavaMail.zimbra@???????.??>
Content-Type: text/plain; charset=utf-8
Hoi Jean Marc
I'm active on sats for 20y i think, and did it the first years with simple
yagis, which worked ok. Then made myself some crossed yagis with fixed RHCP,
but with a ot of reading and understanding some things i made it all
switchable. All crossed yagis have now exactly 1/4 spacings at the boom
between the 2 planes, and all delay lines and phasing lines are well cut to
the needed lengths with max difference of about 0.5?.
The fun of switching now between R an L or R/L/V/H polarisations makes a big
difference in both uplink and downlink, would never miss it again.
I also have the MASPRO sat system with only R to L switch, but that relay is
a simple print relay.
The switch i made on some folded dipole is a coax relay to get more power on
the yagi.
I agree that switching is best on up- and dwnlink; i do this on all passes
though.
Best 73's
Jerry,ON4CJQ
----- Oorspronkelijk bericht -----
Van: "Jean Marc Momple" <jean.marc.momple@?????.???>
Aan: "on4cjq" <on4cjq@???????.??>
Cc: "mikflathead" <mikflathead@???.???>, "amsat-bb" <amsat-bb@?????.???>
Verzonden: Maandag 26 maart 2018 20:14:38
Onderwerp: Re: [amsat-bb] M2 432 polarity switch
Good Evening,
I again believe that I need to provide some feedback on the polarization
issue.
In one using polarized antenna RHCP or LHCP it is quite obvious that one
should be able to change the polarization when working the birds. The most
evident example is AO-92, whereby you have to change same every minute or so
to keep a constant Rx signal strength, this both on the uplink and downlink.
It may be due to the spinning of the satellite which may have a higher rate
than usual, AO-91 is much more stable on this aspect.
Whatever system you may be using to change the polarization is your own
choice, what I wanted to stress is that for 100% reliability you need to be
able to do so on both the uplink and downlink.
73
Jean Marc (3B8DU)
> On Mar 26, 2018, at 8:39 PM, on4cjq@???????.?? wrote:
>
> Hello Mike
>
> there is a much cheaper way!! M? is good but VERY pricy.
> just put a tohtsu cx-120A or CX-140 coaxrelay in a box, a folded dipole
and a 1/2 coax balun. The relay has 2 connections at 1 side and 1 connection
at the other side.
> the one side with the 2 connections: connect each side of the folded
dipole to either relay contact, the side with the 1 relay-conection is for
the feeder to trx.
> i made this for 2m and 70cm crossyagis, and works FB for switching from
RHCP to LHCP.
> the price for the relay cx-120: 37.50? , a small plastic box: a few
?'s....the price for the M?'s: multiply by 7 or 8
>
> best 73's
>
> Jerry,ON4CJQ
>
> ----- Oorspronkelijk bericht -----
> Van: "amsat-bb" <amsat-bb@?????.???>
> Aan: "amsat-bb" <amsat-bb@?????.???>
> Verzonden: Zondag 25 maart 2018 15:58:45
> Onderwerp: [amsat-bb] M2 432 polarity switch
>
> M2 sells a driven element assembly that allows polarity switching for
there 435 antennas. Has any one used this product and can comment? Is there
a cheaper way to do this? Thanks Mike
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Mon, 26 Mar 2018 15:40:25 -0400
From: Philip Jenkins <n4hf.philip@?????.???>
To: AMSAT BB <amsat-bb@?????.???>
Subject: [amsat-bb] Raleigh NC hamfest, March 31
Message-ID:
<CAGdEbNb0ccykxxmLDxE5S3Xoc_P1+v0ygCmggtaqYMwHucRBQA@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
At the Raleigh NC hamfest this Saturday, March 31, John KG4AKV and I -
N4HF - will be manning an AMSAT info table; John will be doing demos as
well. As of right now, John is planning for the AO-92 pass which starts at
1519Z, and AO-91 at 1648Z. (And possibly another pass - TBD)
Philip N4HF
------------------------------
Message: 10
Date: Tue, 27 Mar 2018 11:53:00 -0500
From: Rolf Krogstad <rolf.krogstad@?????.???>
To: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: [amsat-bb] another rotator question
Message-ID:
<CAJJyj=axVBsYZ77t0qJ-xVLRotq92ixFHoQfiEgTVbNsycex0A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Question: My elevation rotator (Yaesu G-5400) works fine, but to raise the
elevation I have to press the down button and to lower it, I press the Up
button. How do I reverse this so it works as intended?
Background:
I had been the traditional HF ham for years. I had a tower with a TH7 and
a Yaesu G-1000-DXA rotator. I then got into working satellites. I
purchased a used Yaesu G-5400 rotator and controller. For the five years
since installing the elevation rotator I have been manually controlling my
rotators. I relabeled the up and down buttons on the controller and all
was good. A few years ago I purchased a new LVB Tracker from AMSAT-NA but
it sat on the shelf.
I am now automating my rotators. I have the azimuth rotator working fine
and have connected the LVB Tracker to control the elevation rotator and
done the configuration routine. I can control the elevation using the LVB
buttons, but must press up for down and down for up.
I looked at the controller schematic and it appears that pins 1, 2, 3 of
the rotator cable connector are connected to the potentiometer: pins 1 and
3 are on either end of the pot windings and pin 2 is the wiper.
I set the antenna to 0 degrees elevation (0 on far left). I tried
reversing the wires for 1 and 3, 1 and 2, 2 and 3. I don't think any of
these will help me here, but am not sure.
Any suggestions on how to reverse the buttons so that up is up and down is
down?
Thanks
Rolf NR0T
Grid EN34
------------------------------
Message: 11
Date: Tue, 27 Mar 2018 12:11:28 -0500
From: Mike Thompson <zryder94@?????.???>
To: Rolf Krogstad <rolf.krogstad@?????.???>
Cc: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] another rotator question
Message-ID:
<CAGD5MUFNU+Pb1oFMcR+szD=pFgY3C0e0P1cP=97+uWqX4JYj+A@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Is the antennas physically moving up when you press the up button? IE when
you press a button, is the rotor moving opposite, or is the needle
indicating opposite?
On Tue, Mar 27, 2018 at 11:53 AM, Rolf Krogstad <rolf.krogstad@?????.???>
wrote:
> Question: My elevation rotator (Yaesu G-5400) works fine, but to raise the
> elevation I have to press the down button and to lower it, I press the Up
> button. How do I reverse this so it works as intended?
>
> Background:
> I had been the traditional HF ham for years. I had a tower with a TH7 and
> a Yaesu G-1000-DXA rotator. I then got into working satellites. I
> purchased a used Yaesu G-5400 rotator and controller. For the five years
> since installing the elevation rotator I have been manually controlling my
> rotators. I relabeled the up and down buttons on the controller and all
> was good. A few years ago I purchased a new LVB Tracker from AMSAT-NA but
> it sat on the shelf.
>
> I am now automating my rotators. I have the azimuth rotator working fine
> and have connected the LVB Tracker to control the elevation rotator and
> done the configuration routine. I can control the elevation using the LVB
> buttons, but must press up for down and down for up.
>
> I looked at the controller schematic and it appears that pins 1, 2, 3 of
> the rotator cable connector are connected to the potentiometer: pins 1 and
> 3 are on either end of the pot windings and pin 2 is the wiper.
>
> I set the antenna to 0 degrees elevation (0 on far left). I tried
> reversing the wires for 1 and 3, 1 and 2, 2 and 3. I don't think any of
> these will help me here, but am not sure.
>
> Any suggestions on how to reverse the buttons so that up is up and down is
> down?
>
> Thanks
>
> Rolf NR0T
> Grid EN34
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 12
Date: Tue, 27 Mar 2018 12:14:54 -0500
From: Rolf Krogstad <rolf.krogstad@?????.???>
To: Mike Thompson <zryder94@?????.???>
Cc: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] another rotator question
Message-ID:
<CAJJyj=YizVbTr1f8HAXaKoYs5Ew8DpPjhTNXrQa48_RHRpb9Kg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
The antenna is rotating. I do a visual check and the antenna is
horizontal.
I have the controller indicating zero, I press the DOWN button and hold it
for a bit.
When I go out and do a visual check the antenna is now elevated above zero.
Rolf NR0T
On Tue, Mar 27, 2018 at 12:11 PM, Mike Thompson <zryder94@?????.???> wrote:
> Is the antennas physically moving up when you press the up button? IE when
> you press a button, is the rotor moving opposite, or is the needle
> indicating opposite?
>
> On Tue, Mar 27, 2018 at 11:53 AM, Rolf Krogstad <rolf.krogstad@?????.???>
> wrote:
>
>> Question: My elevation rotator (Yaesu G-5400) works fine, but to raise
>> the
>> elevation I have to press the down button and to lower it, I press the Up
>> button. How do I reverse this so it works as intended?
>>
>> Background:
>> I had been the traditional HF ham for years. I had a tower with a TH7 and
>> a Yaesu G-1000-DXA rotator. I then got into working satellites. I
>> purchased a used Yaesu G-5400 rotator and controller. For the five years
>> since installing the elevation rotator I have been manually controlling my
>> rotators. I relabeled the up and down buttons on the controller and all
>> was good. A few years ago I purchased a new LVB Tracker from AMSAT-NA but
>> it sat on the shelf.
>>
>> I am now automating my rotators. I have the azimuth rotator working fine
>> and have connected the LVB Tracker to control the elevation rotator and
>> done the configuration routine. I can control the elevation using the LVB
>> buttons, but must press up for down and down for up.
>>
>> I looked at the controller schematic and it appears that pins 1, 2, 3 of
>> the rotator cable connector are connected to the potentiometer: pins 1
>> and
>> 3 are on either end of the pot windings and pin 2 is the wiper.
>>
>> I set the antenna to 0 degrees elevation (0 on far left). I tried
>> reversing the wires for 1 and 3, 1 and 2, 2 and 3. I don't think any of
>> these will help me here, but am not sure.
>>
>> Any suggestions on how to reverse the buttons so that up is up and down is
>> down?
>>
>> Thanks
>>
>> Rolf NR0T
>> Grid EN34
>> _______________________________________________
>> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views of
>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
>
------------------------------
Message: 13
Date: Tue, 27 Mar 2018 12:25:24 -0500
From: Mike Thompson <zryder94@?????.???>
To: Rolf Krogstad <rolf.krogstad@?????.???>
Cc: "<AMSAT-BB@?????.???>" <amsat-bb@?????.???>
Subject: Re: [amsat-bb] another rotator question
Message-ID:
<CAGD5MUHkVzDOpHuW-YJER03ZTCtYoOdM6KqbccLML99yXTUhpw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
either the antenna's are installed opposite (flip them 180, and rotate the
elevation rotor 180 degrees from it's current position relative to the
azimuth rotor), or swap the motor wires to the elevation rotator.
On Tue, Mar 27, 2018 at 12:14 PM, Rolf Krogstad <rolf.krogstad@?????.???>
wrote:
> The antenna is rotating. I do a visual check and the antenna is
> horizontal.
> I have the controller indicating zero, I press the DOWN button and hold it
> for a bit.
> When I go out and do a visual check the antenna is now elevated above zero.
>
> Rolf NR0T
>
> On Tue, Mar 27, 2018 at 12:11 PM, Mike Thompson <zryder94@?????.???>
> wrote:
>
>> Is the antennas physically moving up when you press the up button? IE
>> when you press a button, is the rotor moving opposite, or is the needle
>> indicating opposite?
>>
>> On Tue, Mar 27, 2018 at 11:53 AM, Rolf Krogstad <rolf.krogstad@?????.???>
>> wrote:
>>
>>> Question: My elevation rotator (Yaesu G-5400) works fine, but to raise
>>> the
>>> elevation I have to press the down button and to lower it, I press the Up
>>> button. How do I reverse this so it works as intended?
>>>
>>> Background:
>>> I had been the traditional HF ham for years. I had a tower with a TH7
>>> and
>>> a Yaesu G-1000-DXA rotator. I then got into working satellites. I
>>> purchased a used Yaesu G-5400 rotator and controller. For the five years
>>> since installing the elevation rotator I have been manually controlling
>>> my
>>> rotators. I relabeled the up and down buttons on the controller and all
>>> was good. A few years ago I purchased a new LVB Tracker from AMSAT-NA
>>> but
>>> it sat on the shelf.
>>>
>>> I am now automating my rotators. I have the azimuth rotator working fine
>>> and have connected the LVB Tracker to control the elevation rotator and
>>> done the configuration routine. I can control the elevation using the
>>> LVB
>>> buttons, but must press up for down and down for up.
>>>
>>> I looked at the controller schematic and it appears that pins 1, 2, 3 of
>>> the rotator cable connector are connected to the potentiometer: pins 1
>>> and
>>> 3 are on either end of the pot windings and pin 2 is the wiper.
>>>
>>> I set the antenna to 0 degrees elevation (0 on far left). I tried
>>> reversing the wires for 1 and 3, 1 and 2, 2 and 3. I don't think any of
>>> these will help me here, but am not sure.
>>>
>>> Any suggestions on how to reverse the buttons so that up is up and down
>>> is
>>> down?
>>>
>>> Thanks
>>>
>>> Rolf NR0T
>>> Grid EN34
>>> _______________________________________________
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>>
>>
>
------------------------------
Subject: Digest Footer
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Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 13, Issue 116
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