| |
CX2SA > SATDIG 26.11.12 21:03l 493 Lines 16797 Bytes #999 (0) @ WW
BID : AMSATBB7391
Read: GUEST
Subj: AMSAT-BB-digest V7 391
Path: IZ3LSV<IK2XDE<PY1AYH<PY1AYH<CX2SA
Sent: 121126/2002Z @:CX2SA.SAL.URY.SA #:892 [Salto] FBB7.00e $:AMSATBB7391
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: G5400B Rotor Problem (Alan)
2. Re: G5400B Rotor Problem (tokens@xxxxxxx.xxxx
3. Re: G5400B Rotor Problem (Alan)
4. Video of Elon Musk lecture + 29 MHz Rx Project (Trevor .)
5. G5400B Rotor Problem (Joe Leikhim)
6. OSSI CubeSat on Swedish Radio Show 12:10 CET (Trevor .)
7. SpinSat and Phonesat v2 both plan Summer 2013 launches (Trevor .)
8. CaNoSat - Canadian-Norwegian Sub-Orbital CubeSats (Trevor .)
9. Video ? ARISSAT-1 Operational Survey Results (Trevor .)
----------------------------------------------------------------------
Message: 1
Date: Sun, 25 Nov 2012 14:20:44 -0600
From: Alan <wa4sca@xxxxx.xxx>
To: <tokens@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: G5400B Rotor Problem
Message-ID: <84C24A70EA104602B02F88066C19FE3E@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Al,
To answer the last question, the "out voltage adjust" is for the reference
voltage from the 9-pin DIN connector used with computer control. It has no
effect on the meters.
I had that rotator for years, before replacing it about 15 years ago.
Unlike some of the other similar Yaesu rotators, the azimuth rotator in the
5400B does not have limit switches, though the elevation rotator does. (See
schematic) As I recall, the full mechanical swing is a bit more than 360
degrees, but not the 450 degrees of later units. The stop to stop method
doesn't work well. I would set the left limit as you stated, and then
visually look at the antenna as you step it to the right. In particular,
see what the meter says going through north, then when the antenna swings
around to south again. With it fully CCW, find a place in the yard where
you are looking down the boom. Raising the elevation to 15-20 degrees will
help. Swing it CW 360 degrees and it should look the same. This should be
a more accurate way to calibrate the 360. Let us know what happens.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of tokens@xxxxxxx.xxx
Sent: Sunday, November 25, 2012 12:31 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G5400B Rotor Problem
Hi all,
Trying to get a G5400B rotor going but having some calibration problems with
the azimuth settings. With power off and the rotor set at the left hand
position, I adjust the needle to read 180. When the power is turned on the
reading goes to about 182. I then let the rotor go all the way to the right
180 mark and adjust the full scale pot to read 180. The problem is when the
rotor is half way around and should be reading 360 it actually reads 345.
Any ideas on what I should be looking at? Also there is nothing in the
manual to suggest what the "out voltage adjust" pot is supposed to do. What
is its function?
Thank you for any advice.
73 Al W8KHP
_______________________________________________
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: Sun, 25 Nov 2012 16:00:24 -0500
From: <tokens@xxxxxxx.xxx>
To: <APBIDDLE@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: G5400B Rotor Problem
Message-ID: <F10E40B7C1964BF2B036BB48958FD6A0@xxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Alan,
Thanks for the answers. The rotor goes through its 360 just fine. The
problem is that half way through, when it should read 360 it reads 345.
There is a nonlinearity in the readout.
73,
Al W8KHP
-----Original Message-----
From: Alan
Sent: Sunday, November 25, 2012 3:20 PM
To: tokens@xxxxxxx.xxx ; amsat-bb@xxxxx.xxx
Subject: RE: [amsat-bb] G5400B Rotor Problem
Al,
To answer the last question, the "out voltage adjust" is for the reference
voltage from the 9-pin DIN connector used with computer control. It has no
effect on the meters.
I had that rotator for years, before replacing it about 15 years ago.
Unlike some of the other similar Yaesu rotators, the azimuth rotator in the
5400B does not have limit switches, though the elevation rotator does. (See
schematic) As I recall, the full mechanical swing is a bit more than 360
degrees, but not the 450 degrees of later units. The stop to stop method
doesn't work well. I would set the left limit as you stated, and then
visually look at the antenna as you step it to the right. In particular,
see what the meter says going through north, then when the antenna swings
around to south again. With it fully CCW, find a place in the yard where
you are looking down the boom. Raising the elevation to 15-20 degrees will
help. Swing it CW 360 degrees and it should look the same. This should be
a more accurate way to calibrate the 360. Let us know what happens.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of tokens@xxxxxxx.xxx
Sent: Sunday, November 25, 2012 12:31 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G5400B Rotor Problem
Hi all,
Trying to get a G5400B rotor going but having some calibration problems with
the azimuth settings. With power off and the rotor set at the left hand
position, I adjust the needle to read 180. When the power is turned on the
reading goes to about 182. I then let the rotor go all the way to the right
180 mark and adjust the full scale pot to read 180. The problem is when the
rotor is half way around and should be reading 360 it actually reads 345.
Any ideas on what I should be looking at? Also there is nothing in the
manual to suggest what the "out voltage adjust" pot is supposed to do. What
is its function?
Thank you for any advice.
73 Al W8KHP
_______________________________________________
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: Sun, 25 Nov 2012 15:26:14 -0600
From: Alan <wa4sca@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: G5400B Rotor Problem
Message-ID: <E87951E970FC481F8C754D8BCF8AC7C9@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Al,
The fact that it works OK from S to N but not N to S argues that it is not
in the meter electronics. A final test would be to look a the DC output
voltage from the DIN plug and compare the two. You will be seeing volts,
not degrees, but they should smoothly track, and with a few measurements,
you should be able to calibrate one against the other. They get their
information from the same 500 ohm pot in the rotator, but different
amplifiers. If they track, it is the reference pot. If they don't, it is
the meter.
Replacing the pot is not hard, but a messy, tedious job. You used to be
able to get the pot from Yaesu for about $10, and there are some places you
can Bing which show you how to open up the unit.
73s and good luck.
Alan
WA4SCA
-----Original Message-----
From: tokens@xxxxxxx.xxx [mailto:tokens@xxxxxxx.xxxx
Sent: Sunday, November 25, 2012 3:00 PM
To: APBIDDLE@xxxxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] G5400B Rotor Problem
Alan,
Thanks for the answers. The rotor goes through its 360 just fine. The
problem is that half way through, when it should read 360 it reads 345.
There is a nonlinearity in the readout.
73,
Al W8KHP
-----Original Message-----
From: Alan
Sent: Sunday, November 25, 2012 3:20 PM
To: tokens@xxxxxxx.xxx ; amsat-bb@xxxxx.xxx
Subject: RE: [amsat-bb] G5400B Rotor Problem
Al,
To answer the last question, the "out voltage adjust" is for the reference
voltage from the 9-pin DIN connector used with computer control. It has no
effect on the meters.
I had that rotator for years, before replacing it about 15 years ago.
Unlike some of the other similar Yaesu rotators, the azimuth rotator in the
5400B does not have limit switches, though the elevation rotator does. (See
schematic) As I recall, the full mechanical swing is a bit more than 360
degrees, but not the 450 degrees of later units. The stop to stop method
doesn't work well. I would set the left limit as you stated, and then
visually look at the antenna as you step it to the right. In particular,
see what the meter says going through north, then when the antenna swings
around to south again. With it fully CCW, find a place in the yard where
you are looking down the boom. Raising the elevation to 15-20 degrees will
help. Swing it CW 360 degrees and it should look the same. This should be
a more accurate way to calibrate the 360. Let us know what happens.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of tokens@xxxxxxx.xxx
Sent: Sunday, November 25, 2012 12:31 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G5400B Rotor Problem
Hi all,
Trying to get a G5400B rotor going but having some calibration problems with
the azimuth settings. With power off and the rotor set at the left hand
position, I adjust the needle to read 180. When the power is turned on the
reading goes to about 182. I then let the rotor go all the way to the right
180 mark and adjust the full scale pot to read 180. The problem is when the
rotor is half way around and should be reading 360 it actually reads 345.
Any ideas on what I should be looking at? Also there is nothing in the
manual to suggest what the "out voltage adjust" pot is supposed to do. What
is its function?
Thank you for any advice.
73 Al W8KHP
_______________________________________________
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: Sun, 25 Nov 2012 22:20:03 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Video of Elon Musk lecture + 29 MHz Rx Project
Message-ID:
<1353882003.15187.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The presentation that Elon Musk gave in London on November 16
http://www.uk.amsat.org/?p=11645
G0MRF 29.45 MHz Receiver Project
http://www.uk.amsat.org/?page_id=11615
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
----
------------------------------
Message: 5
Date: Sun, 25 Nov 2012 17:23:22 -0500
From: Joe Leikhim <rhyolite@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] G5400B Rotor Problem
Message-ID: <50B29A5A.8080505@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Al;
The rotor turns a bit beyond the 180 degree clockwise mark, so when setting
it, you have to observe the position of the AZ rotor bell. This is hard to
do if the rotor is on the tower. You may need a helper and some walkie
talkies.
Start with checking the voltages from the controller box.
The regulator Q2 (UA7806C) provides about 6 volts through 15 ohm resistors
to screw terminals A1 and E1 on the rear panel. (A2 and E2 return a variable
voltage from the rotor pots, while A3 and E3) are ground returns). I
measured about +5.9 volts at A1 and E1 on mine.
Last month I was discussing a stability problem with Tom K4TB who advised me
that he found the regulator Q2 would oscillate and the output capacitor C9
(0.01) ineffective, so he added a capacitor directly to the output and fixed
his. The original Thompson datasheet for that device claims no output
capacitor is required, though a National Semiconductor version of that
regulator recommends a .22 uf cap at the input and a 0.1 uf cap at the
output to "help transient response". Common wisdom has been that these
devices may oscillate. I have seen some fluctuation in meter reading on mine
at low end of scale.
I am in process of system testing my rotor and a TAPR TrakBox on the bench,
so I recently set the voltages up to correctly display the azimuth and
elevation. There are two pots on the corners of the rear panel which set the
meter full scale accuracy these are VR1 and VR2. After adjusting these per
the manual, page 4; Pre-Installation Adjustments.
After confirming the meters track the rotor position faithfully, there are a
second inner pair of pots VR3 and VR4 which set the full scale (AZ and EL
needle to full right mark 180 degrees)voltage at the DIN connector which is
normally used to feed an ADC inside an external tracking interface like the
TracBox or Kansas City Tracker, etc. I set mine to accomodate the ADC
voltage range of the TAPR TrakBox, normally 5.0 volts at full scale. Set to
this voltage even if you don't have automation, so if you automate later,
you save from the headache if the voltage is way too high or low. These
outputs should track 0-5V as you go from left to right on the meters.
If you are going to adjust these 4 pots, you might want to splash some
volume control cleaner at them so they track smoothly.
Date: Sun, 25 Nov 2012 13:31:29 -0500
From:<tokens@xxxxxxx.xxx>
To:<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] G5400B Rotor Problem
Message-ID: <4C58B102B2AC45A7AD70C87ED4F77C10@xxxx>
Content-Type: text/plain; charset="UTF-8"
Hi all,
Trying to get a G5400B rotor going but having some calibration problems with
the azimuth settings. With power off and the rotor set at the left hand
position, I adjust the needle to read 180. When the power is turned on the
reading goes to about 182. I then let the rotor go all the way to the right
180 mark and adjust the full scale pot to read 180. The problem is when the
rotor is half way around and should be reading 360 it actually reads 345.
Any ideas on what I should be looking at? Also there is nothing in the
manual to suggest what the ?out voltage adjust? pot is supposed to do. What
is its function?
Thank you for any advice.
73 Al W8KHP
--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
JLeikhim@xxxxxxx.xxx
407-982-0446
WWW.LEIKHIM.COM
------------------------------
Message: 6
Date: Mon, 26 Nov 2012 10:08:25 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] OSSI CubeSat on Swedish Radio Show 12:10 CET
Message-ID:
<1353924505.21236.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Today Monday, November 26 at 12:10 CET Swedish Radio will broadcast a show
about the Maker Movement that will include an item on Hojun Song DS1SBO and
the OSSI CubeSat that is planned to launch in April 2013.
See http://sverigesradio.se/sida/avsnitt/120914?programid=412
Text in English at http://bit.ly/TlA6Bq
Previous shows have been available after broadcast from the website as MP3's
73 Trevor M5AKA
------------------------------
Message: 7
Date: Mon, 26 Nov 2012 16:00:02 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] SpinSat and Phonesat v2 both plan Summer 2013
launches
Message-ID:
<1353945602.98934.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
SpinSat Packet Radio Satellite To Launch Next Summer
http://www.uk.amsat.org/?p=11674
Nexus S PhoneSat v2 Plans Summer 2013 Launch
http://www.uk.amsat.org/?p=11670
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
----
------------------------------
Message: 8
Date: Mon, 26 Nov 2012 18:56:03 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CaNoSat - Canadian-Norwegian Sub-Orbital CubeSats
Message-ID:
<1353956163.59616.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
See the video at http://www.uk.amsat.org/?p=11684
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
----
------------------------------
Message: 9
Date: Mon, 26 Nov 2012 19:26:45 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Video ? ARISSAT-1 Operational Survey Results
Message-ID:
<1353958005.70654.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The presentation given by Steve Bible N7HPR at the ARRL/TAPR DCC in Atlanta.
See http://www.uk.amsat.org/?p=11690
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
----
------------------------------
_______________________________________________
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 7, Issue 391
****************************************
Read previous mail | Read next mail
| |
