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CX2SA > SATDIG 19.11.10 19:45l 999 Lines 33642 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Verticals on FM sats (Roger Kolakowski)
2. Re: Kenpro 500 parts? (Tony)
3. Re: [sarex] Re: Re: ARISSat-1 and FOX social media
fundraising (Lou McFadin)
4. sat radios for sale (Jeff KB2M)
5. Re: [sarex] Re: Re: ARISSat-1 and FOX social media
fundraising (Anthony Monteiro)
6. Re: Verticals on FM sats (Bruce Robertson)
7. Sats after dark (Dominic Hawken)
8. Re: Sats after dark (Mark L. Hammond)
9. Re: Sats after dark (Alan P. Biddle)
10. Re: Sats after dark (Chris Bloy)
11. Re: Sats after dark (Mark L. Hammond)
12. North America - ISS School Contact This Morning on 145.800
(JoAnne Maenpaa)
13. Re: Sats after dark (Chris Bloy)
14. Re: ARISSat-1 and FOX fundraising (Andrew Glasbrenner)
----------------------------------------------------------------------
Message: 1
Date: Fri, 19 Nov 2010 01:15:14 -0500
From: Roger Kolakowski <Rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: Verticals on FM sats
To: John Geiger <aa5jg@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx. Org" <amsat-bb@xxxxx.xxx>
Message-ID: <4CE615F2.20900@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Check Bob Bruninga's (wb4apr) treatise on 19" verticals for use on 440
and 2 meter satellite frequencies (rather positive but you need a good
ground plane)
Google his call and 19" ground plane or look in the archives here...
Roger
WA1KAT
On 11/18/2010 8:28 PM, John Geiger wrote:
> I apologize if this topic has been covered recently, but I am asking
again. I am in the middle of redoing antennas, and am looking to keep
something up for the FM satellites. How well will a 1/4 wave dualband
groundplane work on the satellites? I remember reading a review in QST in
the past year or so about a dualband J pole,and the reviewer said he got
into AO27 and AO51 just fine. What can I expect out of a 1/4 wave antenna?
>
> 73s John AA5JG
> _______________________________________________
> 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: Fri, 19 Nov 2010 01:50:03 -0500
From: Tony <dxdx@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Kenpro 500 parts?
To: "G. Beat" <gregory.beat@xxxxxxx.xxx>, AMSAT-BB
<amsat-bb@xxxxx.xxx>
Message-ID: <4CE61E1B.2050309@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 11/18/2010 11:20 PM, G. Beat wrote:
>
>
> Tony - REMEMBER -- ALL this hardware is METRIC.
> So use the proper parts and tools !>
> w9gb
Yes, I was reminded of this the other day when I removed the rusty
hardware. I have the proper tools and all I need now is the replacement
parts ; )
Thanks again
Tony -K2MO
>
> ----- Original Message -----
> From: "Tony"<dxdx@xxxxxxxxx.xxx>
> To: "G. Beat"<gregory.beat@xxxxxxx.xxx>, "AMSAT-BB"<amsat-bb@xxxxx.xxx>
> Sent: Thursday, November 18, 2010 7:21:45 PM
> Subject: Re: [amsat-bb] Re: Kenpro 500 parts?
>
> Greg,
>
> Wow! Thanks very much for that wealth of information on the old Kenpro.
> My old unit still works fine, but some of the hardware is rusted pretty
> bad. The G550 hardware looks identical so I may be in luck.
>
> I also need the terminal cover, but I doubt Yaesu has it since they
> don't use that type of wiring configuration anymore. Need to find some
> generic cover that fits.
>
> Thanks again Greg
>
> Tony -K2MO
>
>
> On 11/18/2010 4:58 PM, G. Beat wrote:
>>
>>
>> Tony -
>>
>>
>>
>> Unless you have access to a local machine shop and machinist,
>>
>> your only source for these Japanese manufactured parts is Yaesu USA.
>>
>>
>>
>> SOME of the KR-500 parts may be identical (common) to the current
>> production Yaesu G-550 elevation rotator.
>>
>>
>>
>> Yaesu purchased the Kenpro Company which originated these designs.
>>
>> The individual azimuth and elevation rotators were KR-400 and
>> KR-500.
>>
>> Later came the KR-5400, the KR-5400-A/B and the KR-5600-A/B.
>>
>> [i]After the purchase, Yaesu eventually changed these prefix
>> designations to "G" from the earlier "KR".
>>
>> DIY REPAIR SITES for the KenPro / Yaesu Rotators, Courtesy of the
>> previous KenPro/Yaesu queries from QRZ and AMSAT-BB reflector
>> (archives)
>>
>>
>>
>> Henk, PA3GUO (Netherlands) described the repair and cleaning of the
>> KR400 and KR500 rotators (Photos). http://www.pa3guo.com/
>>
>>
>>
>> KENPRO-YAESU ELEVATION ROTATOR MAINTENANCE This is a useful
>> collection of articles compiled by longtime AMSAT member Ron Long
>> W8GUS. Common faults of the KR-500 series elevation rotator and its
>> derivatives are described. Instructions, hints and tips for
>> disassembly, cleaning, and rebuild are included. ZIP File size
>> 11.5K. http://www.users.zetnet.co.uk/clivew/kr_rot.zip
>>
>>
>>
>> W7KKE had a web page that demonstrated the rebuilding of his Yaesu
>> G-5500 Az/Elev rotator,
>>
>> however that web page is now gone. : -(
>>
>> http://webpages.charter.net/k.swaggart/W7KKE/w7kke.html
>>
>>
>>
>> IF you need parts or desire to have the rotator repaired by Yaesu,
>> you can contact the Yaesu service department in California that
>> handles rotator repairs.
>>
>> Vertex Standard USA Attn: Amateur Repair 10900 Walker Street Cypress,
>> CA 90630 For customer service, technical support or parts, please
>> call: 714-827-7600 ==== K6VLF in Fresno, CA started a repair business
>> for older KenPro / Yaesu rotors --- Contact him for details! * Phone:
>> (559) 264-0772 * Email: k6vlf@xxxxxxx.xxx * Web:
>> http://yaesurotorrepair.com
>>
>>
>> Talino, IZ7ATH has photos (belt) of his repair
>> http://www.qsl.net/iz7ath/web/02_brew/13_rotor/english/pag07_eng.htm
>>
>>
>> Full article
>> http://www.qsl.net/iz7ath/web/02_brew/13_rotor/english/pag02_eng.htm
>>
>>
>> His web site http://www.qsl.net/iz7ath/web/home_eng.htm
>>
>>
>>
>> KenPro KR-500 manual http://www.w4rp.com/KR500/index.html
>>
>>
>> http://www.g4dmf.co.uk/rotatorinfo/rotators.html
>>
>>
>> Yaesu G-550 manual
>>
http://www.yaesu.com/downloadFile.cfm?FileID=968&FileCatID=155&FileName=G%2D55
0.pdf&FileContentType=application%2Fpdf
>>
>>
>>
>> Greg
>>
>> w9gb ===
>>
>> Date: Thu, 18 Nov 2010 00:37:12 -0500 From: Tony, K2MO Subject: To:
>> AMSAT-BB
>>
>> All,
>>
>> Can anyone tell me if the mounting hardware on the Yaesu G-550 is the
>> same as the old Kenpro KR-500? Anyone other than Yaesu selling parts
>> for these units?
>>
>> Thanks,
>>
>> Tony - K2MO _______________________________________________ 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
>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus
signature database 5631 (20101118) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
------------------------------
Message: 3
Date: Thu, 18 Nov 2010 14:35:42 -0500
From: Lou McFadin <w5did@xx.xxx>
Subject: [amsat-bb] Re: [sarex] Re: Re: ARISSat-1 and FOX social media
fundraising
To: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Cc: "sarex@xxxxx.xxxx <sarex@xxxxx.xxx>, Amsat-BB
<amsat-bb@xxxxx.xxx>, Thomas Frey <th.frey@xxxxxxx.xx>
Message-ID: <4271EF31-CFE1-4064-91AD-A00047870988@xx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
I fully support what Drew says here. AMSAT NA has been very supportive to
all of AMSAT DLs projects. We have poured many thousands of dollars into p3e
not to mention the efforts of our volunteers in the past.
You are of course still free to support whatever projects you want to. You
are also welcome to use the AMSAT BB and other services provided free by
AMSAT-NA.
You might consider cross joining AMSAT-NA as many of us U.S. Hams have
joined other AMSAT organizations as a way of showing support.
Sent from my iPad
On Nov 18, 2010, at 12:30, Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
wrote:
> On 11/18/2010 12:07 PM, Thomas Frey wrote:
>> I fully agree with Domenico. BTW there is no website or a video
>> presentation
>> known about the project FOX. Is this a "paper tiger" ?
>>
>
http://www.amsat.org/amsat-new/images/fck_images/2010_President_Annual_Report%
281%29.pdf
> Slides 14 through 17
>
> There were multiple presentations regarding FOX at the recent Symposium.
> Feel free to pick up a copy of the proceedings until they get posted on
> the website.
>
>>
>> This are projects from HAMs for HAMs with Linear Transponders.
>
> So is ARISSat-1, along with a new robust telemetry system, and several
> SSTV cameras.
>
>> Sorry
>> folks, we have fairly enough FM repeaters in the orbit.
>>
>
> I'm sorry. I didn't realize that soliciting donations for an AMSAT-NA
> project on an AMSAT-NA list required your approval. You are free to
> support whatever project you like, but you are IMO crossing the line of
> good taste and manners attacking our project on our own email list. If I
> were an AMSAT-DL or -ZL officer, I'd be embarrassed to have you
> harassing an AMSAT-NA on their behalf. Personally I have donated to all
> of the above mentioned projects. I also voted as a Director of AMSAT to
> spend a large amount of money, a substantial percentage of what the FOX
> launch will cost, to keep AMSAT-DL's lab open to continue work on P3E. I
> also voted to spend an even larger amount of money on lawyers to try to
> find a way to allow AMSAT-NA volunteers to work on foreign projects
> without risking jail under ITAR.
>
> 73, Drew KO4MA
>
> ----
> 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: 4
Date: Fri, 19 Nov 2010 06:40:53 -0500
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] sat radios for sale
To: "'Amsat-Bb@xxxxx. Org'" <amsat-bb@xxxxx.xxx>
Message-ID: <00da01cb87de$9f6a1490$de3e3db0$@xxx>
Content-Type: text/plain; charset="us-ascii"
I'm putting my shack back together after moving into my new home and have a
couple of radio's I would like to sell. I'm not getting off the sats just
going to upgrade a bit. I should be back on in a week or so..
1.Icom IC-910. Extras include the 1200 mHz option, one AF DSP chip for the
RX, power cord, and new complete faceplate not yet installed. $1000 or best
offer.
2. Kenwood TH D7G. includes 2 batteries, drop in charger, and speaker hand
mic. While parts were available I replaced all the rubber and front plastic
on radio, thus it works, and also looks like new. $250 or best offer.
I have the manuals for the D7, and 910. No original shipping box for the
910. Price includes shipping CONUS. Reason I'm selling is I'm going to
upgrade to an Icom 9100, and the new Kenwood replacement for the D7.
I will also donate 10% net of the sale to AMSATNA.
73 Jeff kb2m
------------------------------
Message: 5
Date: Fri, 19 Nov 2010 06:41:18 -0500
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Subject: [amsat-bb] Re: [sarex] Re: Re: ARISSat-1 and FOX social media
fundraising
To: Samudra Haque <samudra.haque@xxxxx.xxx>
Cc: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <201011191141.oAJBfLow076769@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Hi Samudra,
We haven't worked this out yet.
73,
Tony AA2TX
---
At 06:21 PM 11/18/2010, Samudra Haque wrote:
>Can I ask how many solar panels will be unfurled from the 1U chassis
>which has an internal dimension of approx. 87 x 87 mm? Will it be a
>symmetric or assymetric arrangement? Will the antenna be embedded into
>the extended solar panel?
>
>73 de N3RDX
>
>Samudra
>
>On Thu, Nov 18, 2010 at 4:48 PM, Anthony Monteiro <aa2tx@xxxxxxx.xxx> wrote:
> > Hi Trevor,
> >
> > The current plan is to use the same frequency for the FM downlink
> > and the telemetry beacon. The IHU will have sufficient memory capacity to
> > hold at least a days worth of data so the beacon would be turned on once
> > a day for a telemetry dump and then back to transponder mode.
> >
> > And yes, we plan to use forward error correction on the beacon so
> > that it will be bulletproof. It will likely be a different format
> > than the one used on ARISSat-1 since we want a higher bit rate and Fox
> > will be passive magnetic stabilized (like AO-51) so it will not suffer
> > from tumble fading like ARISSat might and the interleave length does not
> > need to be as long.
> >
> > Thanks for your interest!
> > Tony AA2TX
> > ---
> >
> > At 03:35 PM 11/18/2010, Trevor . wrote:
> >>--- On Thu, 18/11/10, Andrew Glasbrenner
> <glasbrenner@xxxxxxxxxx.xxx> wrote:
> >> >
> >>
>
http://www.amsat.org/amsat-new/images/fck_images/2010_President_Annual_Report%
281%29.pdf
> >> >
> >> > Slides 14 through 17
> >>
> >>Hi Drew,
> >>
> >>Really glad to see that AMSAT-NA is going ahead with the FOX project.
> >>
> >> >From my point of view potentially the valuable part of FOX is the
> >> deployable Solar Panels.
> >>
> >>This has never been done on a 1U CubeSat and should significantly
> >>increase the power available. A space proven system to deploy panels
> >>on a 1U sat will benefit not just AMSAT-NA for future projects but
> >>the entire CubeSat community.
> >>
> >>Unfortunately I wasn't able to get to the symposium so perhaps you
> >>could clarify one of the slides for me.
> >>
> >>Slide 16 mentions both a U/V FM transpoder and a V telemetry beacon.
> >>Is the telemetry beacon on a seperate frequency from the transponder
> >>so both can run at the same time ? Also is the beacon using the
> >>robust narrow band, high efficiently, BPSK system developed for
ARISSat-1 ?
> >>
> >>I look forward to the launch of ARISSat-1 in the New Year with its
> >>first ever space deployment of a SDX linea___________
> >>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: 6
Date: Fri, 19 Nov 2010 08:50:41 -0400
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] Re: Verticals on FM sats
To: John Geiger <aa5jg@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx. Org" <amsat-bb@xxxxx.xxx>
Message-ID:
<AANLkTinBHwh=+iLyb5fZ=DKRZ5nniXFiFow1ObX8Qmfm@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Thu, Nov 18, 2010 at 9:28 PM, John Geiger <aa5jg@xxxxxxx.xxx> wrote:
> I apologize if this topic has been covered recently, but I am asking
again. ?I am in the middle of redoing antennas, and am looking to keep
something up for the FM satellites. How well will a 1/4 wave dualband
groundplane work on the satellites? ?I remember reading a review in QST in
the past year or so about a dualband J pole,and the reviewer said he got
into AO27 and AO51 just fine. ?What can I expect out of a 1/4 wave antenna?
>
> 73s John AA5JG
Hi, John --
If you picture the pattern of a typical 1/4 wave antenna, you will
recall that the it looks a bit like a half-bagel lying face down on
the kitchen counter. This is super for terrestrial work, where we want
to have as much power as possible going out to the horizon, because
the other, earth-bound stations are to be found at that low elevation.
But such an antenna improves its power on the horizon by 'stealing'
some from higher elevations, and once you think about transmitting to
or receiving from a station up 20 degrees or more, say, you'll find
that you're working with much less power. And once you're, say, 70
degrees from the counter-top, well, with an ideal 1/4 wave, you're
putting out no power (and receiving none) whatsoever. (In reality, its
not that bad, but its pretty darn bad.)
For this reason, a standard 1/4 wave (or J-pole) isn't ideal for
satellite work. It will certainly work, especially in the elevation
band where the path losses (which decrease with elevation) and losses
due to your antenna pattern produce a maximum signal. It's great fun
to listen for this effect, and a bit easier to observe with a CW
signal and s-meter. (You can treat a FM bird's signal as an FM signal
just by switching modes, of course.)
What would be an ideal shape for our 'omnidirectional' satellite
antenna? Let's have a muffin instead of a bagel, lop its top off and
place that on the counter insre the power is all going straight
up, because satellites spend a good deal of time in the low angles
(depending on where you are). We just want to 'fill in' the bits that
we lose from our bagel pattern.
There are many designs that aim to provide something like this muffin
pattern. You can make your vertical longer than 5/8 wavelength (the
19" at 440, e.g.); you can tilt the 1/4 wave vertical at around 20
deg. from perpendicular to its ground plane; you can use lindenblad
arrangements to circularize and redistribute. I have a 2m qadrifilar
helix antenna that does its job nicely.
One terribly important point on 70cm is that you have a low noise
preamp connected to the antenna on the mast, not in your shack. I have
a $5 70cm 1/4 wave groundplane that I made out of a female
N-connector. I would much, much rather use it with my ARR preamp than
a 8 element yagi without the preamp. Way more fun. The reason for this
with omni antennas is that we are having to distribute all the
'receiving power' over all the elevation angles, as well as the 360
degrees of azimuth. In other words, your muffin has to be smaller in
diameter than your bagel half, because both have to have the same
total volume.
Finally, your question suggests that simpler antennas, like 1/4 wave
groundplanes, are not necessarily easy to use on SSB/CW birds. I find
the contrary, especially on CW. FM satellites are easier because they
don't require as frequent tuning due to doppler shift, and because
many hams already have the equipment needed to operate them. But they
aren't 'easier' in the sense that their signals are easier to hear
with simple equipment. Heck, with any sort of antenna and an low-noise
preamp you'll hear the CW beacon of HO-68 from horizon to horizon.
I hope you will forgive me if this reply was aimed at the wrong level,
and I wish you all the best in your satellite station building.
73, Bruce
VE9QRP
--
http://ve9qrp.blogspot.com
------------------------------
Message: 7
Date: Fri, 19 Nov 2010 13:29:01 +0000
From: Dominic Hawken <dominic@xxx.xx.xx>
Subject: [amsat-bb] Sats after dark
To: amsat-bb@xxxxx.xxx
Message-ID: <4CE67B9D.8050500@xxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Probably a dumb question and still new to this - apologies in advance.
Am I right in thinking the amateur sats switch comms off when not in
sight of the sun? Are there any that continue to run in darkness?
Best,
Dominic G6NQO
------------------------------
Message: 8
Date: Fri, 19 Nov 2010 08:54:49 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Sats after dark
To: Dominic Hawken <dominic@xxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTimpPHrFW75Es6fYnKVbkT9N+L=bX9bbA_k1U+S8@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Dominic,
It'support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 9
Date: Fri, 19 Nov 2010 07:59:18 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: Sats after dark
To: "'Dominic Hawken'" <dominic@xxx.xx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <9346F4F8ADCB4CA0B16F87B783D5C1E5@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Dominic,
Welcome! Actually, most satellites start out operating continuously. They
run on batteries when they are in the dark. Normally the batteries over
time lose capacity. Then, various techniques are implemented to conserve
power so that they can continue to operate when in darkness. Recently there
have been a few satellites designed to operate only when illuminated, such
as DO-64. Generally the ones which require illumination are old satellites
such as AO-7 and NO-44 which no longer have functioning batteries or control
systems. Fortunately satellites are usually, but not always, illuminated
even when the area below is dark.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Dominic Hawken
Sent: Friday, November 19, 2010 7:29 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Sats after dark
Probably a dumb question and still new to this - apolthe satellite can continue to support communications during an eclipse (what
we call the time spent in darkness).
Some satellites do not have batteries, so they will support communications
only when in the sun (DO-64 for example).
IO-26 has batteries that are pretty old--yet it continues to operate
through pretty long (20 mins or more) of eclipse each orbit. So yes, there
are examples where the transmitters work through eclipse (IO-26, VO-52,
etc.).
For AO-51, it's all about power management--both by the bird and by the
command stations. Right now, AO-51 sees sun all the time. Around
January 1, it will begin to experience ecslipses again. Its
batteries have lost much of their capacity, and we expect that there will
be enough power to keep the computer alive during eclipses, but the
transmitters will need to be shut OFF. The computer and software onboard
AO-51 help do that automatically (for the most part).
Hope that helps!
73,
Mark N8MH
On Fri, Nov 19, 2010 at 8:29 AM, Dominic Hawken <dominic@xxx.xx.xx> wrote:
> Probably a dumb question and still new to this - apologies in advance.
> Am I right in thinking the amateur sats switch comms off when not in
> sight of the sun? Are there any that continue to run in darkness?
>
> Best,
>
> Dominic G6NQO
>
> _______________________________________________
> 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
>
--
Mark L. Hammond [N8MH]
_______________________________________________
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: Fri, 19 Nov 2010 10:17:57 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Sats after dark
To: Chris Bloy <chris@xxxxxxxxxxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTikghjqsx1GMhRp0JSijNqKyGp=srAg7kL0CFb-O@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Chris,
You have a great memory :)
We had hoped that with some experimenting that we could configure
IO-26 into a "bent-pipe FM/SSB repeater" like we did with AO-16. Thus
far, I haven't been successful. It is likely that the hardware isn't
in place to permit this. We haven't completely abandoned the idea,
but our best guess attempts at making it work haven't work out. It
may be something we can again attempt over the holidays (between
Thanksgiving and New Years) when we are on holiday with some extra
hours in the shack!
Last weekend I turned AO-16 on; it stayed up for about 30 secs--not
long enough to be useful.
Glad you asked.
73,
Mark N8MH
On Fri, Nov 19, 2010 at 9:34 AM, Chris Bloy <chris@xxxxxxxxxxx.xx.xx> wrote:
> Hi Mark,
>
> I remember a while ago you mentioned that it may be possible to reconfigure
> IO-26 to be used like LO-16? Was I seeing things or was this a true and has
> any progress been made on this?
>
> Thanks,
> Chris
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Mark L. Hammond
> Sent: 19 November 2010 13:55
> To: Dominic Hawken
> Cc: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: Sats after dark
>
> Hi Dominic,
>
> It's a great question!
>
> If the satellite has batteries that can keep the communications payload ON,
> the satellite can continue to support communications during an eclipse (what
> we call the time spent in darkness).
>
> Some satellites do not have batteries, so they will support communications
> only when in the sun (DO-64 for example).
>
> IO-26 ?has batteries that are pretty old--yet it continues to operate
> through pretty long (20 mins or more) of eclipse each orbit. ?So yes, there
> are examples where the transmitters work through eclipse (IO-26, VO-52,
> etc.).
>
> For AO-51, it's all about power management--both by the bird and by the
> command stations. ?Right now, AO-51 sees sun all the time. Around
> January 1, it will begin to experience ecslipses again. ? Its
> batteries have lost much of their capacity, ?and we expect that there will
> be enough power to keep the computer alive during eclipses, but the
> transmitters will need to be shut OFF. ?The computer and software onboard
> AO-51 help do that automatically (for the most part).
>
> Hope that helps!
>
> 73,
>
> Mark N8MH
>
> On Fri, Nov 19, 2010 at 8:29 AM, Dominic Hawken <dominic@xxx.xx.xx> wrote:
>> Probably a dumb question and still new to this - apologies in advance.
>> Am I right in thinking the amateur sats switch comms off when not in
>> sight of the sun? Are there any that continue to run in darkness?
>>
>> Best,
>>
>> Dominic G6NQO
>>
>> _______________________________________________
>> 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
>>
>
>
>
> --
> Mark L. Hammond [N8MH]
> _______________________________________________
> 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
>
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 12
Date: Fri, 19 Nov 2010 09:20:02 -0600
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Subject: [amsat-bb] North America - ISS School Contact This Morning on
145.800
To: <amsat-bb@xxxxx.xxx>
Message-ID: <001501cb87fd$3dbb1ea0$b9315be0$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hello Everyone,
This is a quick heads up ... ISS School contact should be heard this morning
in western 2/3 of USA beginning at approximately 16:43 UTC.
Listen on 145.800 MHz FM for the contact with Holy Family Catholic School,
Grand Junction, Colorado.
The contact will be direct between NA1SS and W0YH. The ground track extends
from San Francisco northeast toward Hudson Bay.
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
Copy Editor, AMSAT Journal
------------------------------
Message: 13
Date: Fri, 19 Nov 2010 16:56:30 -0000
From: "Chris Bloy" <chris@xxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Re: Sats after dark
To: "'Mark L. Hammond'" <marklhammond@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <018701cb880a$b92f5ad0$2b8e1070$@xxxxxxxxxxx.xx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Mark,
Well that sounds like a good plan to me! Is there anything that IO-26 can be
used for?
I am also guess that LO-19 (the test beacon!) has failed too as I haven?t
seen any update from Argentina for a long time now about returning the
beacon to service!
Shame about AO-16 as I never got the change to use it as I didn?t have the
equipment available at the time!
Take care,
Chris
-----Original Message-----
From: Mark L. Hammond [mailto:marklhammond@xxxxx.xxxx
Sent: 19 November 2010 15:18
To: Chris Bloy
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Re: Sats after dark
Hi Chris,
You have a great memory :)
We had hoped that with some experimenting that we could configure
IO-26 into a "bent-pipe FM/SSB repeater" like we did with AO-16. Thus far,
I haven't been successful. It is likely that the hardware isn't in place to
permit this. We haven't completely abandoned the idea,
but our best guess attempts at making it work haven't work out. It
may be something we can again attempt over the holidays (between
Thanksgiving and New Years) when we are on holiday with some extra hours in
the shack!
Last weekend I turned AO-16 on; it stayed up for about 30 secs--not long
enough to be useful.
Glad you asked.
73,
Mark N8MH
On Fri, Nov 19, 2010 at 9:34 AM, Chris Bloy <chris@xxxxxxxxxxx.xx.xx> wrote:
> Hi Mark,
>
> I remember a while ago you mentioned that it may be possible to
> reconfigure
> IO-26 to be used like LO-16? Was I seeing things or was this a true
> and has any progress been made on this?
>
> Thanks,
> Chris
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
> On Behalf Of Mark L. Hammond
> Sent: 19 November 2010 13:55
> To: Dominic Hawken
> Cc: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: Sats after dark
>
> Hi Dominic,
>
> It's a great question!
>
> If the satellite has batteries that can keep the communications
> payload ON, the satellite can continue to support communications
> during an eclipse (what we call the time spent in darkness).
>
> Some satellites do not have batteries, so they will support
> communications only when in the sun (DO-64 for example).
>
> IO-26 ?has batteries that are pretty old--yet it continues to operate
> through pretty long (20 mins or more) of eclipse each orbit. ?So yes,
> there are examples where the transmitters work through eclipse (IO-26,
> VO-52, etc.).
>
> For AO-51, it's all about power management--both by the bird and by
> the command stations. ?Right now, AO-51 sees sun all the time. Around
> January 1, it will begin to experience ecslipses again. ? Its
> batteries have lost much of their capacity, ?and we expect that there
> will be enough power to keep the computer alive during eclipses, but
> the transmitters will need to be shut OFF. ?The computer and software
> onboard
> AO-51 help do that automatically (for the most part).
>
> Hope that helps!
>
> 73,
>
> Mark N8MH
>
> On Fri, Nov 19, 2010 at 8:29 AM, Dominic Hawken <dominic@xxx.xx.xx> wrote:
>> Probably a dumb question and still new to this - apologies in advance.
>> Am I right in thinking the amateur sats switch comms off when not in
>> sight of the sun? Are there any that continue to run in darkness?
>>
>> Best,
>>
>> Dominic G6NQO
>>
>> _______________________________________________
>> 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
>>
>
>
>
> --
> Mark L. Hammond [N8MH]
> _______________________________________________
> 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
>
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 14
Date: Fri, 19 Nov 2010 10:55:36 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 and FOX fundraising
To: sarex@xxxxx.xxxx Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4CE69DF8.9040207@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'm proud to announce that the Facebook and PayPal widget campaign has
raised $1,000 over the last 48 hours! This is a great first step towards
replenishing the funds used in the construction of ARISSat-1, and
beginning the design and construction of AMSAT-FOX. Thank you to those
who posted the fundraiser to their own pages, and to those who donated.
Did you know:
ARISSat-1 will broadcast live slow scan pictures from space? All that
will be needed to receive these pictures is a 2 meter FM receiver and a
soundcard equipped computer.
ARISSat-1 has a Mode U/V (B) linear transponder using SDR technology as
a testbed for future transponder missions.
ARISSat-1 uses a new robust telemetry format including FEC to counteract
signal losses during long fades.
ARISSat-1 is set to deploy early in 2011, just months away.
Our PayPal widget is now on the front page of amsat.org (thank you
JoAnne!), where you can donate and download the widget for your own
webpage or blog, and our Facebook application is available at
http://bit.ly/c861N7 . With these two fundraising tools, it is as
important to share and post the widgets on your own page as it is to
actually donate. To succeed we must reach those amateurs and space
enthusiasts not in the normal AMSAT circles. Please visit and share
today, to help us fund these two projects. Thank you for all your support!
73, Drew KO4MA
------------------------------
_______________________________________________
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 5, Issue 456
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