| |
CX2SA > SATDIG 19.06.08 08:39l 544 Lines 19138 Bytes #999 (0) @ WW
BID : 11432_CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V3 308 (2/2)
Path: IZ3LSV<IK2XDE<F5GOV<F4BWT<DK0WUE<SP7MGD<CX2SA
Sent: 080619/0644Z @:CX2SA.LAV.URY.SA #:11432 [Minas] FBB7.00e $:11432_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Message: 4
Date: Wed, 18 Jun 2008 23:58:41 -0400
From: "Chris Hackworth" <n8phucjh(AT)gmail.com>
Subject: [amsat-bb] Re: DirecWav satellite internet useful?
To: AMSAT-BB(AT)amsat.org
Message-ID:
<298264bf0806182058u50966606ka2bb65686e1f74b1(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
On Wed, Jun 18, 2008 at 1:30 PM, Chris Hackworth <n8phucjh(AT)gmail.com>
wrote:
> Greg and BBS,
>
> Here is an example of a lnb conversion:
>
> http://www.qsl.net/g0ory/10g/sce975/sce975.html
>
> On Wed, Jun 18, 2008 at 1:19 AM, Greg D. <ko6th_greg(AT)hotmail.com> wrote:
>>
>> 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
>> _______________________________________________
>> 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
>>
>
>
>
> --
> Chris N8PHU
> ET1(SW) USN (Ret)
> Chief transmitter Heavy SES-Americom
>
--
Chris N8PHU
ET1(SW) USN (Ret)
Chief transmitter Heavy SES-Americom
------------------------------
Message: 5
Date: Wed, 18 Jun 2008 21:20:53 -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:
<2e18ad3e0806182120w595754e5u2fe6bbbe3ba4a6c2(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Hi Art!
> I plan to be on VO-52 for Field Day, working the Satellite station for the
> Palomar Amateur Radio Club and using the Club Call W6NWG Schedule was sent
> out for FO-29 It should be on for Field Day and I will try it too.
> See copy below:
><snip>
I compared those pass times from JE9PEL's e-mail (generally between
0100 and 0300 UTC on each day when it will be on), and compared it to
FO-29 passes for Arizona. In the next few days, FO-29 would pass by
generally between 0600 and 1000 UTC and also between 1600 and
1900 UTC. Since none of those times match up with the times in that
other e-mail, it is fair to say that - for North America, at least - FO-29 is
not available for us to use during Field Day on 28-29 June. A shame.
I had hoped that FO-29 would be back, as that would make the Doppler
tuning with my two-radio setup a little bit easier. Oh well... I will give
VO-52 a try this weekend as previously planned. I'm really confident
that my planned SSB/CW satellite station (two FT-817NDs) will work
out, and it will be nice to have something in addition to FM satellites
available for demonstrations, presentations, etc. I do.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 6
Date: Thu, 19 Jun 2008 01:09:20 -0500 (CDT)
From: "David Donaldson" <wb7dru(AT)usfamily.net>
Subject: [amsat-bb] Airing Suitsat's dirty laundry
To: "'AMSAT BB'" <amsat-bb(AT)amsat.org>
Message-ID: <007e01c8d1d3$708ecad0$01fea8c0(AT)DAVEBEDROOM>
Content-Type: text/plain; charset="iso-8859-1"
Guys
I am sorry but Tom Clarks description of stuffing Suitsats 2 legs with
dirty laundry was just to much. The lines keep coming to mind.
My mother (rip) used to call it Jr. High humor.
So here goes....
1) Thanks to Tom for airing the dirty laundry.
2) Can I donate some to the next flight? It would save me having to
wash them.
3) I would like to propose an experiment on impact of weightlessness on
muddy pants. Maybe we could measure the mud partical density in the
lag. As the mud floats off the pants and into space the density will
reduce. We could and send data via AX.25 packet, and provide a dirty
online qsl card.
4) This project will actually help the enviorment by saving water
necessary to wash. Just let the laundry burn up. Cool
Maybe I will stick to designing cellsites and stay out of aerospace....
Sorry :>)
this list sometimes takes its self to seriously....
Dave
WB7DRU
So many oppertunities so little time.
Sent with Wireless Sync from Verizon Wireless
-
--- Get FREE High Speed Internet from USFamily.Net! --
http://www.usfamily.net/mkt-freepromo.html ---
------------------------------
Message: 7
Date: Wed, 18 Jun 2008 14:47:13 -0500
From: "Andrew Koenig" <andrewkoenig(AT)thathamkid.com>
Subject: [amsat-bb] Re: LEO's
To: "Edward Cole" <kl7uw(AT)acsalaska.net>
Cc: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID:
<2f52b89b0806181247y7192e24fv3398747cf158daec(AT)mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
When I sent my first email out I didn't mean to bash the HEOs in any way. I
just intended to get the point across that FM LEOs take the modest of setup
to get onto, and that complaining about the lack of HEOs isn't helping
anyone.
To be honest, if HEOs are like y'all describe them to be, I'll really enjoy
a good 20 minute QSO. I would like to see Eagle and P3E go up too, but none
of this complaining is helping the cause.
Again, I'm only 14. I do not have the money to go buy a nice radio (such as
the FT-817). The FM LEOs work well for me because I can use 2 HT's and a
homebrew yagi. If there's a HEO launched soon, I might take some money out
of my Dayton fund for a rig, but until then I'm going to be staying with the
LEOs.
On Wed, Jun 18, 2008 at 9:45 AM, Edward Cole <kl7uw(AT)acsalaska.net> wrote:
> Interesting link to P3E. Obvioulsy written in early 2007 and talks
> about P3E launch in mid-2007. This is the only link I have seen that
> offers muli-lingual translation. All other P3E pages are in
> German. Has anyone found any info more up to date? I believe this
> is how this topic got its start...wanting P3E info!
>
> Domenico states the situation, well, I think. Any who actually
> experienced working AO-10/13/40 know that it does not take a
> complicated station. It does take a SSB station and gain-type
> antennas vs. a dua-band HT with omni or Arrow antenna. For other
> than mode-UV (what was called mode-B)(i.e. mode-VS, LS, and up) Leos
> are difficult to work due to high-rate Doppler change. This is where
> computer-control of the radio is useful (maybe
> manditory). Auto-tracking makes operating with gain-antennas on Leos
> less stressful. But none of these were needed for operating
> AO-10/13/40. I think those who added these features did so as a
> technical asset or for the enjoyment of the project.
>
> My old AO-40 antenna system will be restored sometime this summer and
> I may get around to installing auto-tuning/tracking. Then I may show
> up on AO-7 occasionally when the Moon is too low to work.
>
> 73 Ed - KL7UW
>
> At 01:46 AM 6/18/2008, i8cvs wrote:
> >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-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
>
--
73's
Andrew K.
KE5GDB
http://www.thathamkid.com
------------------------------
_______________________________________________
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 308
****************************************
Read previous mail | Read next mail
| |
