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CX2SA > SATDIG 14.06.09 21:08l 416 Lines 16785 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Got Yaesu 5400 rotor control box problem (w4upd)
2. Re: equal time (n3tl@xxxxxxxxx.xxxx
3. "Ultimate Charger" website (Jim Jerzycke)
4. Help - no antennas allowed (john heath)
5. Re: Help - no antennas allowed (Mark Spencer)
6. Re: Anyone has demo version of Cubesat structure ?
(Jonathan Wagner)
7. VP2V/K4SAT Will be OTA From Virgin Gorda 6/15 through 6/20
(RFI-EMI-GUY)
----------------------------------------------------------------------
Message: 1
Date: Sun, 14 Jun 2009 10:27:46 -0400
From: w4upd <updwrb@xxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Got Yaesu 5400 rotor control box problem
To: John Price <n4qwf1@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A3508E2.8060808@xxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
This is similar to a problem I had some time ago and it was both bad
pots. You have two pots to calibrate the meters and two pots for
computer control. The computer control ones were very sensitive to EMI.
I replaced both pots and the unit has been fine ever since. I had found
the one end of the pots were open preventing accurate adjustments.
Hopefully this is all that is wrong with yours. The pots were fairly
inexpensive from Yaesu. I took and paralleled a regular 500 pot
externally (alligator clip wires) to confirm this and found that I was
able to adjust the unit.
Regards,
Reid Bristor, W4UPD
John Price wrote:
> I have hauled out my spare 5400 rotor for field day and found I have a
> problem. The control box is not sending accurate readings to the
> computer. It works fine as far as the rotor and the meter readings. I
> know the problem is in the control box as the one I use for everyday
> operation works fine with this rotor. I have checked the voltages at
> the transformer and they are OK so I am now suspect of one or
> both of the pots that adjust output voltage. I when I connect it to
> just one side of the rotor I can not get it to adjust to 1023 in the
> calibration routine in the software. Connecting it to the other side
> shows the same result. What I do see is a value that bounces around at
> random.
>
> I guess my question is does this mean that I have two bad pots or is
> there some common connection between the AZ/EL output that would
> exhibit this result. Any ideas would be greatly appreciated.
>
> Thanks << John
>
>
> ------------------------------------------------------------------------
>
>
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------------------------------
Message: 2
Date: Sun, 14 Jun 2009 14:34:12 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: equal time
To: "Thomas McGrane" <n2oeq@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID:
<061420091434.23302.4A350A630008BD1300005B0622218865869B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Pat and all,
A while back, when AO-51 went into two consecutive weeks of non-Mode J
configuration, I expressed concerns to some folks within the AMSAT community
because I didn't - and still don't - believe that was appropriate. In
response, an AMSAT official suggested that I "take a look at the big picture"
of satellite operations. He explained that, although there are few owners and
users of L and S band gear - especially when compard to those who regularly
use AO-27, AO-51 and SO-50 with V/Ugear - those of us who can work Mode J and
Mode B have many more options than those who want to experiement with L band
and S band. He was, and is, right about that. So I took his advice.
It was, in fact, precisely because of his advice that I focused more attention
on the other satellites - something I hadn't really done. As a result, I have
four European countries and Africa in the log on AO-7, which is something I
never expected to accomplish. My log also includes multiple contacts on all of
the SSB/CW satellites using a fully rechargeable station powered by its
elements' internal battery packs. Being an old QRP addict, the coolest of all
are the milliwatt contacts I've made on AO-7 using the Elk, handheld, from
inside my home.
AMSAT's mission, simply stated, is to "keep amateur radio in space." That
mission doesn't include assuring that you or any operator has a "fair chance"
at using AO-51 or any other satellite. It wasn't AMSAT's fault, for example,
that I struggled for months with some issues here that kept me from
effectively working AO-7, FO-29 and VO-52. Now that I can, I often talk to
myself for an entire pass because nobody else is around. Neither AO-27 nor SO-
50 are used nearly so much. It's hard to argue that AO-51 is the most popular
and most-used amateur satellite in low Earth orbit - except for those times
when the International Space Station ham gear is configured in its FM voice
repeater mode.
I don't believe it's appropriate to connect your support of AMSAT with your
ability to work any satellite.
AMSAT charges membership dues, not user fees.
To be consistent with that line of reasoning, I should have been one of the
first stations the K5D DXpedition worked on the satellites because I supported
AMSAT's efforts by donating my Arrow antenna to the gear being assembled for
loan to DXpeditions. I was not one of the first; I'm grateful I made the log
at all, to be honest. Had I not, I would not have regretted supporting efforts
to expand opportunities to expose AMSAT and its mission of keeping amateur
radio in space to a much broader community.
I miss contacts - often - because stations you refer to as "regular repetitive
users" begin making calls. It happened last night during the 23:30 UTC pass of
AO-51 when I had a very short window to try to work HK6IOP in Colombia. I
heard him clearly and called him a few times - with 5 watts from an FT-817ND
into the Elk antenna I was hand-holding and manually pointing. Was I
disappointed not to work him? Of course. But those other stations have just as
much right as I to work the satellite with any gear configuration that is
legal for use under FCC Part 97 - even if it's a Jingtong HT! You alluded to
this in your post - but I could have chosen to physically move a part of my
shack so I could have used a radio with up to 50 watts out on the uplink. I
chose not to. That choice is important to note.
You have stated your choice of not increasing power, moving forward, to get
into the satellite. That IS your choice.
This time last year, however, I didn't have a choice like that to make. A
Yaesu VX-7R HT was the only amateur radio I owned, having donated all of my
original ham gear to an ARES group in 2003 because I'd been off the air since
early 1992, and they certainly were going to make more use of it than I had in
the preceding decade. After looking into the ARISS program, I ordered an Arrow
antenna because I wanted to work the ISS. All the satellites and, more
importantly, all the friendships I've made on them, have been wonderful
blessings that I'm very grateful for.
That information relates directly to my final point. I made my first-ever
satellite contact last June 28th. Less than a month later - 28 days later - I
worked my 100th grid. It took me more than twice as long to get the QSL cards
I needed to apply for VUCC than it did to work the grids - ALL with a half-
duplex, handheld satellite station running no more than 5 watts out.
Two nights ago, on the usually busy evening pass of AO-51 to my west (and it
was busy that night), I made four contacts using a Yaesu VX-3R HT and my Elk
antenna, which replaced the Arrow last fall. On its internal battery pack, the
VX-3R's high-power setting is 1.5 watts out. I had already worked three
stations when a neighbor walked across the street after his curiosity got the
best of him. As he listened to the call signs of stations working AO-51, I
"located" for him those stations I was familiar with. "That guy is in Florida.
He's in Louisiana. That guy is up by Chicago."
About that time, KG6NUB threw out his call from CM87 in San Francisco. "You
mean, that guy is in San Francisco ... for real?" my neighbor asked. "He is,
and I'm going to try to call him." It took three tries, actually, but we
worked. My neighbor was flabbergasted that a radio not much larger than a
Zippo lighter and an antenna I could hold in my hand enabled me to talk to a
guy in San Francisco because we each bounced our signals off a 13-inch-cube
satellite orbiting roughly 500 miles above the Earth.
I just saw the post from Ben, N1WBV, who I worked on the early pass of AO-51
two nights ago when he was mobile. He's right, and everyone would do well to
read the guide - shameless plug or not! hihi - as I and others have. Of
course, that hasn't kept me from make more contacts on a given pass than I
should have. It happens to all of us, even if we're only running a few watts
from a fully handheld station.
I include what I did about earning Satellite VUCC all handheld, and about the
AO-51 passes two nights ago, because if I can do it, anyone can - including
you. Maybe you should focus more on what you CAN do than what you can't,
without blaming others for your inability to regularly get into AO-51. I do
here, all the time, on a little HT and a crappy ol' Elk antenna. Go figure.
I am sorry if you are offended, Pat - but I felt like you needed told.
73 to all,
Tim - N3TL
-------------- Original message from "Thomas McGrane" <n2oeq@xxxxxx.xxx>: ----
----------
> To the regular repetitive users of Echo
>
> Please refrain from hogging the satellite every pass for multiple contacts.
> I cant get into the satellite anymore and I am not going to use the
amplifier to
> fight everyone.
>
> Sorry if you are offended but you need to be told.
>
> My support of amsat is directly proportional to my ability to use the
satellite.
>
> pat
> _______________________________________________
> 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, 14 Jun 2009 09:52:12 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] "Ultimate Charger" website
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <933855.70684.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Thanks to all who replied. I'm still getting 404'ed when I try to go to
ultimatecharger.com, but thanks to LeRoy, KD8BXP, I was able to get the info I
needed on the controller from cached pages at
http://web.archive.org/web/20070524034301/www.ultimatecharger.com/.
It looks like they have most of his info from the "Dishes for Amateurs" pages,
including the links that were embedded within the pages.
I have an LVB tracker, but it's not assembled yet, so I thought I'd dig out my
"Satellite Tracker Senior" and use that one for Field Day, as I know it works.
73, Jim? KQ6EA
------------------------------
Message: 4
Date: Sun, 14 Jun 2009 17:58:34 +0100
From: "john heath" <g7hia@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Help - no antennas allowed
To: "amsat" <amsat-bb@xxxxx.xxx>
Message-ID: <E1EE341F6B9C4D40A8E7BE1F449BED54@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Satelliters,
Moving QTH soon and expect to be in an area where there are no external
antennas permitted.
Does anyone on the list have actual experience of working satellites with
antennas mounted inside the roofspace?
I would be very interested to hear of your experiences and what type of
antennas work best.
73 John G7HIA
------------------------------
Message: 5
Date: Sun, 14 Jun 2009 10:43:59 -0700 (PDT)
From: Mark Spencer <mspencer12345@xxxxx.xx>
Subject: [amsat-bb] Re: Help - no antennas allowed
To: "g7hia@xxxxxxxxxx.xxxx <g7hia@xxxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <466117.47938.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I've worked AO 51 with a hand held from inside a wood frame house if that
info helps (:
My $.02 worth if you can get omni antennas in the attic space of a typical
wood frame building with a non conductive roof you will likely be able to make
some contacts. Hope this helps.
john heath wrote:
> Hi Satelliters,
> Moving QTH soon and expect to be in an area where there are no external
antennas permitted.
> Does anyone on the list have actual experience of working satellites with
antennas mounted inside the roofspace?
> I would be very interested to hear of your experiences and what type of
antennas work best.
> 73 John G7HIA
> _______________________________________________
> 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
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------------------------------
Message: 6
Date: Sun, 14 Jun 2009 13:18:52 -0500
From: Jonathan Wagner <jonathan@xxxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Anyone has demo version of Cubesat structure ?
To: William Leijenaar <pe1rah@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<3d85a5ad0906141118h30642000x32ed658ec5118adf@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I think you may have a problem in that while there is a set of
specifications which must be met (CubeSat Developer
Documents<http://cubesat.atl.calpoly.edu/pages/documents/developers.php>),
developers are free to design their structures in any way which meets
these. This leads to a large variety of designs (stackable boards,
motherboard/daughterboard, or any combination of internal assembly), and
therefore fitting your transponder into one of these designs would in no
case guarantee it would fit in any other.
Perhaps you should consider contacting Andrew Kalman with Pumpkin,
inc.<http://www.cubesatkit.com/>about getting your design incorporated
into the CubeSat Kit. To date, there
are only three cubesats in space which use the structure, but it's probably
the closest to a "standardized" design.
Jonathan Wagner
On Sun, Jun 14, 2009 at 9:18 AM, William Leijenaar <pe1rah@xxxxx.xxx> wrote:
>
> Hi AMSATs,
>
> I am looking for some Cubesat structure that I can use for demonstration of
> my Ultra Small Lineat Transponder design. It should not be an expensive
> flight-model version. Its only for showing the idea how my transponder can
> be mount into a cubesat body.
>
> I can try to make some structure myself, but that takes lots of work and I
> need to get the precize sizes somehow. Maybe someone has ever made a Cubesat
> demo version ?
>
> My kind regards,
>
> William Leijenaar PE1RAH
> ---
>
>
>
> _______________________________________________
> 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: 7
Date: Sun, 14 Jun 2009 14:54:44 -0400
From: RFI-EMI-GUY <Rhyolite@xxxxxxxx.xxx>
Subject: [amsat-bb] VP2V/K4SAT Will be OTA From Virgin Gorda 6/15
through 6/20
To: amsat-bb@xxxxx.xxx
Message-ID: <4A354774.6070303@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Please listen for me on the LEO's this week in FM mode only. I will be
the QRP station:. VP2V/K4SAT. I will be operating from St John USVI
for a few days afterword using K4SAT. I will be operating the station
secondary to other activities so likely won't be on every pass.
--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"?
"Use only Genuine Interocitor Parts" Tom Servo ;-P
------------------------------
_______________________________________________
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 4, Issue 279
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