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CX2SA > SATDIG 18.06.08 15:38l 875 Lines 31956 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. LEO (Jim Danehy)
2. FM satellites versus linear HEOs (OZ1MY)
3. Re: LEO (John W Lee)
4. Re: Satellites 101 (Tim Tuck)
5. FO-29 and Field Day? (Chris Maness)
6. Re: AO7 status (Ronald Nutter)
7. Re: Spanish cubesat (Bruce Robertson)
8. Maderia Island on the AO-51 6/17 2121Z Pass (Ben Jackson)
9. Re: FO-29 and Field Day? (Patrick STODDARD (WD9EWK/VA7EWK))
10. Re: Spanish cubesat (Sam KC2LRC)
11. Re: DirecWav satellite internet useful? (Greg D.)
12. Re: LEO's (kc6uqh)
13. Re: LEO's (i8cvs)
----------------------------------------------------------------------
Message: 1
Date: Tue, 17 Jun 2008 17:11:09 -0400
From: "Jim Danehy" <jdanehy(AT)cinci.rr.com>
Subject: [amsat-bb] LEO
To: <amsat-bb(AT)amsat.org>
Message-ID: <70E4A3CC414A4FE9A70E7681904AAE8D(AT)JamesPC>
Content-Type: text/plain; charset="iso-8859-1"
I am perplexed why some have to be critical of another person's interest. I am
a QRQ CW operator. If you do not like CW that is OK. I do. We will probably
not work on that mode if you don't like it. I cut my teeth on Oscar 6 and
dropped out of satellites in about 1982. I have not yet tried an FM bird. I am
working to get back on LEOs on CW. I will probably do SSB too. I hope to be
on soon.
There is a saying that if it isn't CW it is just CB. I look forward to HEO
but until then it is LEO.
Jim W9VNE
Cincinnati, Ohio
EM 79
------------------------------
Message: 2
Date: Tue, 17 Jun 2008 23:27:30 +0200
From: "OZ1MY" <oz1my(AT)privat.dk>
Subject: [amsat-bb] FM satellites versus linear HEOs
To: "AMSAT-BB" <amsat-bb(AT)AMSAT.Org>
Message-ID: <000701c8d0c1$0b268b00$6501a8c0(AT)opasia.dk>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
I think the 14 year old radio amateur got it right :-)
The are many aspects to the hobby as he points out.
Some of us like one thing others want something else - but
I think most of us want both linear transponders on HEO satellites
and LEO satellites with FM transponders or linear transponders.
As far as I can see, most large AMSAT organizations (DL and NA)
are building and hope to launch HEO satellites these days.
Small AMSAT organizations may still want to build and launch
LEOs perhaps in cooperation with universities in their home country.
I can not to see the problem.
If the 2 meter band is too crowded and the same in the 70 cm band
let us move to higher frequencies.
These days with PC control of the transceivers it should not
be a large problem to use these higher frequencies even with
LEO satellites.
73 OZ1MY
Ib
------------------------------
Message: 3
Date: Tue, 17 Jun 2008 13:41:05 -0800
From: John W Lee <k6yk(AT)juno.com>
Subject: [amsat-bb] Re: LEO
To: jdanehy(AT)cinci.rr.com
Cc: amsat-bb(AT)amsat.org
Message-ID: <20080617.134243.2112.4.k6yk(AT)juno.com>
Content-Type: text/plain; charset=us-ascii
AMEN !
On Tue, 17 Jun 2008 17:11:09 -0400 "Jim Danehy" <jdanehy(AT)cinci.rr.com>
writes:
> I am perplexed why some have to be critical of another person's
> interest. I am a QRQ CW operator. If you do not like CW that is OK.
> I do. We will probably not work on that mode if you don't like it. I
> cut my teeth on Oscar 6 and dropped out of satellites in about 1982.
> I have not yet tried an FM bird. I am working to get back on LEOs
> on CW. I will probably do SSB too. I hope to be on soon.
>
> There is a saying that if it isn't CW it is just CB. I look forward
> to HEO but until then it is LEO.
>
> Jim W9VNE
> Cincinnati, Ohio
> EM 79
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
>
>
____________________________________________________________
Sweepstakes!!!
Enter for your chance to WIN a summer spa getaway!
http://thirdpartyoffers.juno.com/TGL2141/fc/JKFkuJi7UjkWoH7XEreOpxKX0rnHJmjY9n
x7lRXiN0DqpsBVhC4BZj/
------------------------------
Message: 4
Date: Wed, 18 Jun 2008 08:54:38 +1000
From: "Tim Tuck" <tim.tuck(AT)penrith.net>
Subject: [amsat-bb] Re: Satellites 101
To: AMSAT BB <amsat-bb(AT)amsat.org>
Message-ID: <485840AE.2070401(AT)penrith.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi all,
I'd just like to say thanks to all of you for the information provided
I'm now thinking of doing a series of talks besides a 101
I've also discovered that there's paper models for just about every craft that
has ever flown! You could build your own space museum if you wanted to.
So I'm going to build up a CubeSat, Delphi-C3 and an AO51 for my talk and I
might build an ISS just for my own enjoyment :)
thanks again
regards
Tim
--
VK2XTT :: QF56if :: BMARC :: WIA :: AMSAT
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------------------------------
Message: 5
Date: Tue, 17 Jun 2008 17:19:33 -0700
From: "Chris Maness" <christopher.maness(AT)gmail.com>
Subject: [amsat-bb] FO-29 and Field Day?
To: amsat-bb(AT)amsat.org
Message-ID:
<b2e0a4330806171719h1040e56dp578f1cc9b5a5d6ef(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
For the past several years I have used FO-29 for field day. Is this sat
usable? The sat status appears that it is in a questionable state. I have
never used a FM mode J sat for field day, and would assume that it would
turn into what CBer's call a key down contest, were the biggest amp wins due
to the capture effect. It seems that mode J-FM birds are already crowded
during a regular day. I could only imagine that it would be very difficult
to work during FD. I had listen to VO-52 during FD and noticed that there
was not any FD traffic on the bird. Could we use this sat if FO-29 is not
functional? If so, that is the satellite I plan on trying to work for FD.
I miss RS-12/13 Good bird for FD.
Thanks,
Chris KQ6UP
------------------------------
Message: 6
Date: Tue, 17 Jun 2008 20:18:45 -0500
From: Ronald Nutter <rnutter(AT)networkref.com>
Subject: [amsat-bb] Re: AO7 status
To: John Geiger <aa5jg(AT)lcisp.com>
Cc: amsat-bb(AT)amsat.org
Message-ID: <48586275.5030309(AT)networkref.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
John:
AO-7 is alive and well. Just a little differently from what it used to
be. It is only operational when in sunlight. Since it only gets power
when in the sun, it can come up in one of two modes, somewhat at random.
If you go to http://oscar.dcarr.org, you can get a rough idea as to what
it has been doing lately based on reports from others.
Ron
KA4KYI
AMSAT Area Coordinator - Missouri
John Geiger wrote:
> I have been out of the satellite game for awhile, but now am back, after
> getting the 70cm antenna back up and a second radio to do full duplex with.
> What is the current status of AO7? The AMSAT page says "non-operational"
> but I seem to have seen some emails recently that might suggest otherwise.
> If it is operational, is it always in Mode B now?
>
> 73s John AA5JG
> (ex: W5TD, NE0P)
> 6M WAS #1275, 6m VUCC #1260
> 2m VUCC #615, Satellite VUCC #129
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: Tue, 17 Jun 2008 22:50:07 -0300
From: "Bruce Robertson" <ve9qrp(AT)gmail.com>
Subject: [amsat-bb] Re: Spanish cubesat
To: "Simon Brown (HB9DRV)" <simon(AT)hb9drv.ch>
Cc: AMSAT <amsat-bb(AT)amsat.org>
Message-ID:
<49657a760806171850m47448acevd2bf0b75439bac2f(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I'm thinking of the young people to whom I demo satellites from time
to time. The SEEDS signal is great fun to download, but, of course, it
is the same static image. What if the SSTV image were a downconverted
image of the earth taken from an on-board camera? I know the
resolution would be terrible, but neither were the Apollo landing
pictures. The immediacy of knowing that this is an image of earth from
space, combined with the speed and ease of SSTV reception would be
pretty neat, I think. I'd be inclined not to care about tumble,
either. If this shot has no earth in it, who cares as long as the next
one is likely to.
Secondly, I would love to see some real earth or oceanic science being
done with cubesats. Is there someone you could collaborate with who
has a question in mind on these topics that current satellites can't
answer? I'd be inclined, just for the fun of it, to pose the question
to the top oceanographers and imaging people. 'Hams help investigate
effects of global warming' would be a pretty nice QST article :-)
Finally, keep in touch. I know it must be lots of work to let the ham
community know about your work, but it will go miles in terms of good
will and telemetry capture. It doesn't have to be anything fancy, just
cc'ing amsat-bb on some technical report emails would be fantastic.
Basically, we're just a bunch of guys who would love to be in your
shoes; the more you let us know about what that's like, the better.
It's one of the many things the Delfi C3 guys have done right.
73, Bruce
VE9QRP
On Mon, Jun 16, 2008 at 3:45 PM, Simon Brown (HB9DRV) <simon(AT)hb9drv.ch>
wrote:
> My vote is for SSTV, preferably Scottie 2 format.
>
> Simon Brown, HB9DRV
>
> --------------------------------------------------
> From: "Mark Vandewettering" <kf6kyi(AT)gmail.com>
>>
>> I'm personally interested in imaging, so I am intrigued by satellites
>> like CUTE (which carries essentially a cell phone camera), COMPASS-1
>> (which carries an as-yet untried camera down link) and SEEDS (which
>> has an SSTV downlink).
>>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: 8
Date: Tue, 17 Jun 2008 23:42:46 -0400
From: Ben Jackson <bbj(AT)innismir.net>
Subject: [amsat-bb] Maderia Island on the AO-51 6/17 2121Z Pass
To: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID: <48588436.3070606(AT)innismir.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
-----BEGIN PGP SIGNED MESSAGE-----
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Interesting enough that I will bring this to -bb, partially to let
others know, and partially to try to satisfy my own curiosity...
On the 2121Z east coast pass (topping out at a whopping 5 degree
elevation from my QTH) I was able to weakly copy a Maderia Island,
Portugal station calling CQ North America. We were never able to trade
grid squares, nor was I able to get 100% copy his call sign (I can only
make out CT3?G on my recording), but we did hear each other.
So, I want to let everyone on the east coast know that there are reasons
to operate very low passes of AO-51, and I'm curious if anyone might
know who the station might be that I heard? I'd love to try to try to
set up another chance and give it another go.
Also, just to show how well meager setups work: I was using FT-7800 into
a mag mount for the uplink and a FT-60 with a K5OE handi-tenna for the
downlink. All from my car sitting in my condo parking lot. :)
- --
Ben Jackson - N1WBV - New Bedford, MA
bbj <at> innismir.net - http://www.innismir.net/
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------------------------------
Message: 9
Date: Tue, 17 Jun 2008 21:44:27 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb(AT)wd9ewk.net>
Subject: [amsat-bb] Re: FO-29 and Field Day?
To: amsat-bb(AT)amsat.org
Message-ID:
<2e18ad3e0806172144n183c579eg8c4ae25e9a6885b(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hi Chris!
> For the past several years I have used FO-29 for field day. Is this sat
> usable? The sat status appears that it is in a questionable state. I have
It looks like we won't be able to use FO-29. Since it started having
problems, the Japanese have been turning it on for just passes near
Japan.
> never used a FM mode J sat for field day, and would assume that it would
> turn into what CBer's call a key down contest, were the biggest amp wins due
> to the capture effect. It seems that mode J-FM birds are already crowded
> during a regular day. I could only imagine that it would be very difficult
Yes, the FM birds are crowded during Field Day. With the 100-point
satellite QSO bonus under the ARRL Field Day rules, there are many
stations set up just to make the contact for those points. Low-power
or QRP stations *can* make the contacts during Field Day, but it is
much harder than on a normal weekend. Difficult, but not impossible.
> to work during FD. I had listen to VO-52 during FD and noticed that there
> was not any FD traffic on the bird. Could we use this sat if FO-29 is not
> functional? If so, that is the satellite I plan on trying to work for FD.
> I miss RS-12/13 Good bird for FD.
Any satellite is available for use during Field Day, including VO-52. If
you plan on entering your log for either ARRL's or AMSAT's Field Day
competition (or both), make sure to read through both sets of rules.
There are some differences between them.
I now have a new setup for the SSB birds, a pair of FT-817NDs,
since I have not been successful using an AOR handheld receiver
for the downlink. The receiver is more than sensitive enough, but
could not tune in steps small enough to clearly hear the voices in
SSB. I saw the two 817s work with VO-52 during a demo at
Dayton in 2006, so I am confident I will make my first non-FM
satellite QSO this weekend. Then, on to Field Day...
Good luck and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
(planning on a 1B/1-operator/battery QRP effort, on HF and satellites,
from somewhere in Arizona for Field Day)
------------------------------
Message: 10
Date: Tue, 17 Jun 2008 20:55:56 -0400
From: "Sam KC2LRC" <kc2lrc(AT)gmail.com>
Subject: [amsat-bb] Re: Spanish cubesat
To: amsat-bb(AT)amsat.org
Message-ID:
<7f2d65b40806171755m36610a52s2acc0c86bd4e1c1a(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
First off all, thank you for giving us the opportunity to toss out our ideas
for the satellite!
Since the power budget of the cubesat will be very limited, I feel an FM
repeater is the way to go. Nihon University's SEEDS II cubesat shows that it
is possible to run an FM transmitter for at least a significant time within
the power budget of a single unit cubesat, and its signal is very easily
received even with simple handheld 435MHz beams. At the same time SO-50,
with its 250mW transmitter, shows that such a small transmitter power can
still be reliably and clearly received.
The FM transmitter involved in this design could be used for other purposes
as well. It could be used for SSTV transmissions, AFSK telemetry, or even a
digitalker. So if the satelite also has scientific payloads, the same
transmitter could first be used to downlink payload data, and then could be
switched to repeater mode when the experiments are complete. A BPSK
transmitter could also be used but this would limit the audience - there are
many hams out there, like me, who don't own all mode VHF/UHF gear.
73,
Sam KC2LRC - FN13
------------------------------
Message: 11
Date: Tue, 17 Jun 2008 22:19:42 -0700
From: "Greg D." <ko6th_greg(AT)hotmail.com>
Subject: [amsat-bb] Re: DirecWav satellite internet useful?
To: <amsat-bb(AT)amsat.org>
Message-ID: <BLU133-W437BCA9D7A1330F5DE09AEA9AB0(AT)phx.gbl>
Content-Type: text/plain; charset="Windows-1252"
Hi folks,
An update on my Ku dish, the result of some lite poking around. Links to
pictures, below.
The receive LNB has a sticker on it claiming "11.7-12.2 ghz", so this is a bit
outside of the ham band. Judging from the construction, it looks like it's
circularly polarized, and is fed with about a 3/4" round waveguide. According
to another Ham, it appears to have what he called a "ceramic oscillator" or
something like that, feeding a mixer for a low-gHz IF. He guesses the IF out
is in the 1 to 2 ghz range. Since there's not a lot of filtering, and nothing
is crystal controlled, we suspect that it should not be too hard to re-tune
down to the 10-10.5 ghz range. It somewhat depends on whether the LO
injection is on the high or low side, hopefully low. He's also worried if the
waveguide is the right size.
The transmit side of things appears to be linearly polarized, and at a higher
frequency (guessing by the constrictions in the feed pipe). I haven't opened
the full Tx module (didn't have a Torx screwdriver handy), so I don't know
what's under the shield inside. Outside the shield are a bunch of parts,
nothing resembling a transmitter... Their website talks about it putting out
a couple of watts.
I haven't opened up the control box yet.
Some pictures, below. Any additional hints would be appreciated!
The whole dish. Looking on the website, the new ones seem to be round;
hopefully, they haven't changed the electronics part...
http://home.wavecable.com/~ko6th/IMG_0115.JPG
Side view of some of the plumbing. LNB is at the left, and the back of the
feed horn is to the right. The transmitter is piped in from below. We are
guessing that the lumps in the plumbing between the "T" and the LNB is a
filter of some sort, keeping the Tx from frying the Rx. The crud on the parts
is the remains of a rather large wasp nest that was waiting for me inside the
plastic hood. http://home.wavecable.com/~ko6th/IMG_0123.JPG
Outside of the LNB, with the round flange for the waveguide, and one of the
feed probes. The other one is on the back side of the PCB, coming down from
the top (up from the bottom on the next picture).
http://home.wavecable.com/~ko6th/IMG_0131b.JPG
Inside the LNB, with the cover and shield removed. The feed is on the right,
and we believe the LO is the round doughnut thing just to the lower left of
center. There's a set screw on the shield cover that comes down over the
ring, to adjust the frequency. There's one filter section in the middle that
might need tweeking. The IF comes out the upper left.
http://home.wavecable.com/~ko6th/IMG_0130b.JPG
Transmit module, with the inside shield still on. Haven't done much analysis
on this yet... Where did I put that Torx?
http://home.wavecable.com/~ko6th/IMG_0132b.JPG
So, I turn it back to you guys... Any further thoughts?
Greg KO6TH
----------------------------------------
> From: ko6th_greg(AT)hotmail.com
> To: amsat-bb(AT)amsat.org
> Date: Tue, 27 May 2008 21:42:21 -0700
> Subject: [amsat-bb] Re: DirecWav satellite internet useful?
>
>
> Hi all,
>
> Well, it's been saved from the dumpster, at least for now. But, I kind of
don't care much about the dish itself - it's probably a bit big /heavy for my
Az/El rotor setup, though it's hard to tell with the huge steel support mount
still attached. I nearly wrenched my back out carrying it over to my side
yard this morning. (I think the Advil is wearing off... oow)
>
> But, back to the pre-amp and other electronics pieces... I found a
reference to the Hughes DirecWay (not wav) service on the Web. Looks like the
stuff runs in the Ku Band (11-14.5 ghz, according to Wikipedia), and has a
0.5-2 watt transmitter, depending on model. Sounds like it's possibly a good
bit out of band for P3E needs, and I'm not much good with microwave hacking.
Am I better off taking another two pills and putting it back on the pile, or
is there a reasonable chance that I can do some simple (think "Drake")
modifications to get it to work?
>
> Greg KO6TH
>
>
> ________________________________
>> From: w7lrd(AT)comcast.net
>> To: ko6th_greg(AT)hotmail.com; kc6uqh(AT)cox.net; amsat-bb(AT)amsat.org
>> Subject: Re: [amsat-bb] Re: DirecWav satellite internet useful?
>> Date: Tue, 27 May 2008 17:14:01 +0000
>>
>> Greg- They seem to be an off center feed antenna, similar to the old
primestar dish of which I have been successfully using for several years. If
it's free you can't beat the price.
>> 73 Bob W7LRD
>>
>> --
>> "if this were easy, everyone would be doing it"
>>
>> -------------- Original message --------------
>> From: "Greg D."
>>
>>>
>>> Hi Art,
>>>
>>> The DirectWav is an Internet link - data, not TV - but good point about LO
>>> stability being an unknown.
>>>
>>> But, my base question was whether any of the pieces can be used, and it
sounds
>>> like it's worth saving. Thanks!
>>>
>>> Greg KO6TH
>>>
>>>
>>> ----------------------------------------
>>>> From: kc6uqh(AT)cox.net
>>>> To: ko6th_greg(AT)hotmail.com; amsat-bb(AT)amsat.org
>>>> Subject: Re: [amsat-bb] DirecWav satellite internet useful?
>>>> Date: Mon, 26 May 2008 22:20:55 -0700
>>>>
>>>> Greg,
>>>> These dishes are used on 10 GHz and lower frequencies. Designed to
operate
>>>> in Ku Band ~12 GHz they will give ~30 dBof gain. The LNB and feed can be
>>>> used , at least the LNA section. As the intended use is television the LO
is
>>>> not stable enough for Amateur Satellite work.
>>>>
>>>> Art,
>>>> KC6UQH
>>>> ----- Original Message -----
>>>> From: "Greg D."
>>>> To:
>>>> Sent: Monday, May 26, 2008 8:23 PM
>>>> Subject: [amsat-bb] DirecWav satellite internet useful?
>>>>
>>>>
>>>>
>>>> Hi folks,
>>>>
>>>> My neighbor appears to be tossing their Hughes "DirecWav" satellite
internet
>>>> dish and associated dish-mounted electronics. By any stroke of luck, is
>>>> this stuff reasonably convertable for use with any of the the proposed
P3E
>>>> up or downlinks? I have no idea what frequency it runs. It appears to
have
>>>> both transmit and receive capabilities (based on the warnings posted).
>>>> There are no model numbers tha t I can find on the electronics.
>>>>
>>>> I've got my AO-40 S-band receive setup, but nothing for the higher bands.
>>>>
>>>> Thanks,
>>>>
>>>> Greg KO6TH
>>>> _________________________________________________________________
>>>>
_________________________________________________________________
The i?m Talkathon starts 6/24/08.? For now, give amongst yourselves.
http://www.imtalkathon.com?source=TXT_EML_WLH_LearnMore_GiveAmongst
------------------------------
Message: 12
Date: Tue, 17 Jun 2008 22:36:06 -0700
From: "kc6uqh" <kc6uqh(AT)cox.net>
Subject: [amsat-bb] Re: LEO's
To: "John Geiger" <aa5jg(AT)lcisp.com>, <amsat-bb(AT)amsat.org>,
<w0dxz(AT)aol.com>
Message-ID: <006401c8d105$34c1d8e0$0200a8c0(AT)kc6uqh>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
>From my perspective HEO's are much easier to work. The doppler and the
antenna pointing go much slower. With a home brew antennas including a 10
turn helix on a 6' stepladder I worked stations from UK to Japan and all
parts in between on AO40. I used old radios and homebrew converters
including a modified LNB.
A minmal setupI hung a 2M ht on a drop tap to read the signal strength of
the beacon. Adjusted the PrimeStar dish for strongest signal and eyeballed
the helix to be in line with the dish. I had many QSO's and one of the
better signals on the bird.
You can't have a 20 minute QSO on a LEO.
Unless you have a computer controled station, you are spending most of your
time making adjustments. This leaves little time to learn and the best part
of it is the panic only lasts for 15 minutes.
The overhead part of the pass is crazy!
FM makes the doppler easy to handle, but any antenna with more than 6 dB of
gain becomes a pointing nightmere.
Art,
KC6UQH
----- Original Message -----
From: "John Geiger" <aa5jg(AT)lcisp.com>
To: <amsat-bb(AT)amsat.org>; <w0dxz(AT)aol.com>
Sent: Tuesday, June 17, 2008 8:22 AM
Subject: [amsat-bb] Re: LEO's
> Hi Bob,
>
> I agree completely with what you say. Many people who don't think they
> have
> the equipment for the satellites really do-like a dualband FM rig and a
> small yagi. I wouldn't be on the sats either if I hadn't started on the
> FM
> sats and found out how easy using them was. Had a nice AO51 pass a few
> minutes ago also.
>
> 73s John AA5JG
>
> ----- Original Message -----
> From: <w0dxz(AT)aol.com>
> To: <amsat-bb(AT)AMSAT.Org>
> Sent: Tuesday, June 17, 2008 11:32 AM
> Subject: [amsat-bb] LEO's
>
>
>> RE:? Usefullness of LEO's...
>>
>> I think there should always be at least one accessable LEO-FM bird... for
> the very reason that some (WB6LLO) think there should not be. It gets you
> started with satellites.
>>
>> If I had not gone to a hamfest and seen Patrick demo use of the FM birds,
> I would not now be active on not only FM birds, but? the all mode birds as
> well. Without the FM birds, the? imtimidation factor would have been too
> much, I never would have gotten started.
>>
>> Every hobby needs an easy entry level possibility... for many it is the
> LEO's, FM.
>>
>> When I bought my first Harley, a Sportster,,, many said oh, a beginners
> Harley, yeah, maybe, but I would never have? bought a motorcycle? if I had
> to buy a full dresser as my first bike.? And yes, my first gun was a .410,
> not a 12 gauge.? And I learned to snorkel before I learned to SCUBA.
>>
>> FM LEO's have a purpose, a use. Not everyone can? chase the other birds.
> Live and let live. That is the fun part of the ham radio hobbyt, there is
> something for everyone.
>> There may be complaints about LEO-FM birds that are justifiable, but? the
> fact that you can work one with a HT is not one of those arguments.
>> Bob W0DXZ DM33
>> _______________________________________________
>> Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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: 13
Date: Wed, 18 Jun 2008 11:46:46 +0200
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Re: LEO's
To: "kc6uqh" <kc6uqh(AT)cox.net>, "John Geiger" <aa5jg(AT)lcisp.com>,
"AMSAT-BB" <amsat-bb(AT)amsat.org>, <w0dxz(AT)aol.com>
Message-ID: <008d01c8d128$396e8320$0201a8c0(AT)tin.it>
Content-Type: text/plain; charset="iso-8859-1"
Hi Art, KC6UQH
You are correct 100% because the HEO AO40 was very easy to work
using any old TX capable to run about 50 to 100 watt into 70 cm CW and SSB
A 3 to 4 foot dish with a 2400/144 MHz downconverter in the focal point and
connected to any old 144 MHz CW/SSB receiver mounted on the balcony was
sufficient to receive a nice downlink from all over the world by many users
at the same time for many hours every day.
No complicated TX/RX radios and special software was necessary to compensate
for doppler just made by hand.
In my opinion from the operational point of view and communication
efficiency the LEO FM satellites belong to the OCEA i.e. the "Office
Complicating Easy Affair ".
Unfortunately the young radio hams cannot understand what you writes because
they were not fortunate enought to start their satellite experience with
OSCAR-10 OSCAR-13 and the beautiful AO40 and this is why they are happy with
the existing FM birds.
Pulling for P3E...
http://www.p3e-satellite.org/index.pl?step=pixelliste
73" de
i8CVS Domenico
----- Original Message -----
From: "kc6uqh" <kc6uqh(AT)cox.net>
To: "John Geiger" <aa5jg(AT)lcisp.com>; <amsat-bb(AT)AMSAT.Org>;
<w0dxz(AT)aol.com>
Sent: Wednesday, June 18, 2008 7:36 AM
Subject: [amsat-bb] Re: LEO's
> >From my perspective HEO's are much easier to work. The doppler and the
> antenna pointing go much slower. With a home brew antennas including a 10
> turn helix on a 6' stepladder I worked stations from UK to Japan and all
> parts in between on AO40. I used old radios and homebrew converters
> including a modified LNB.
>
> A minmal setupI hung a 2M ht on a drop tap to read the signal strength of
> the beacon. Adjusted the PrimeStar dish for strongest signal and eyeballed
> the helix to be in line with the dish. I had many QSO's and one of the
> better signals on the bird.
>
> You can't have a 20 minute QSO on a LEO.
> Unless you have a computer controled station, you are spending most of
your
> time making adjustments. This leaves little time to learn and the best
part
> of it is the panic only lasts for 15 minutes.
> The overhead part of the pass is crazy!
> FM makes the doppler easy to handle, but any antenna with more than 6 dB
of
> gain becomes a pointing nightmere.
> Art,
> KC6UQH
>
> ----- Original Message -----
> From: "John Geiger" <aa5jg(AT)lcisp.com>
> To: <amsat-bb(AT)amsat.org>; <w0dxz(AT)aol.com>
> Sent: Tuesday, June 17, 2008 8:22 AM
> Subject: [amsat-bb] Re: LEO's
>
>
> > Hi Bob,
> >
> > I agree completely with what you say. Many people who don't think they
> > have
> > the equipment for the satellites really do-like a dualband FM rig and a
> > small yagi. I wouldn't be on the sats either if I hadn't started on the
> > FM
> > sats and found out how easy using them was. Had a nice AO51 pass a few
> > minutes ago also.
> >
> > 73s John AA5JG
> >
> > ----- Original Message -----
> > From: <w0dxz(AT)aol.com>
> > To: <amsat-bb(AT)AMSAT.Org>
> > Sent: Tuesday, June 17, 2008 11:32 AM
> > Subject: [amsat-bb] LEO's
> >
> >
> >> RE:? Usefullness of LEO's...
> >>
> >> I think there should always be at least one accessable LEO-FM bird...
for
> > the very reason that some (WB6LLO) think there should not be. It gets
you
> > started with satellites.
> >>
> >> If I had not gone to a hamfest and seen Patrick demo use of the FM
birds,
> > I would not now be active on not only FM birds, but? the all mode birds
as
> > well. Without the FM birds, the? imtimidation factor would have been too
> > much, I never would have gotten started.
> >>
> >> Every hobby needs an easy entry level possibility... for many it is the
> > LEO's, FM.
> >>
> >> When I bought my first Harley, a Sportster,,, many said oh, a beginners
> > Harley, yeah, maybe, but I would never have? bought a motorcycle? if I
had
> > to buy a full dresser as my first bike.? And yes, my first gun was a
.410,
> > not a 12 gauge.? And I learned to snorkel before I learned to SCUBA.
> >>
> >> FM LEO's have a purpose, a use. Not everyone can? chase the other
birds.
> > Live and let live. That is the fun part of the ham radio hobbyt, there
is
> > something for everyone.
> >> There may be complaints about LEO-FM birds that are justifiable, but?
the
> > fact that you can work one with a HT is not one of those arguments.
> >> Bob W0DXZ DM33
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. 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 3, Issue 305
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