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CX2SA > SATDIG 13.11.08 23:45l 194 Lines 6094 Bytes #999 (0) @ WW
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Sent: 081113/2137Z @:CX2SA.LAV.URY.SA #:48932 [Minas] FBB7.00e $:48932_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. ao-51 mode L/S (Eric Fort)
2. Re: Fort Wayne Hamfest (Robert Bruninga)
3. Re: ao-51 mode L/S (Alan P. Biddle)
4. ARR SP432VDG preamp w/choke FS (John Price)
5. Looking for some guidance on controlling cheap Radio Shack
rotator (Mark Lunday, WD4ELG)
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Message: 1
Date: Thu, 13 Nov 2008 11:01:59 -0800
From: "Eric Fort" <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] ao-51 mode L/S
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430811131101l2b0ffbd3t4221677313f2c8a7@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Are those who are working AO-51 mode L/S mostly using rotors and tracking
software? What are you using to keep the antennas pointed for mode L/S and
what are you using for antennas?
Eric
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Message: 2
Date: Thu, 13 Nov 2008 14:14:54 -0500
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: Fort Wayne Hamfest
To: <amsat-bb@xxxxx.xxx>
Cc: w2npt@xxxx.xxx
Message-ID: <C753083C540342F5B556164B1A5A3C1E@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
> For those going to the Fort Wayne,
> Indiana Hamfest this weekend, the AMSAT
> forum is on Saturday at 1pm... and the
> other involves APRS... at 10 am.
Hummh, I don't see a HAMFEST object anywhere near Indiana on the
APRS map. It would be nice if a local there put a hamfest
object on the map so that mobiles could see this information on
the front panel of their APRS radios and attached GPS's as shown
here: www.aprs.org/avmap/HFESTx.JPG
That image is the GPS map display and on the front panel of the
radio it would show the talk-in frequency and time of the forum.
Everything you need to know. By the way, any hamfest in the
world with an APRS object can be found by the simple check of
http://map.findu.com/hfest*. Right now, I only see one, in New
Jersey.
I guess it is getting too cold for hamfests.
Bob, WB4APR
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Message: 3
Date: Thu, 13 Nov 2008 13:39:28 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: ao-51 mode L/S
To: <eric.fort@xxxxx.xxx>, "'AMSAT-BB'" <amsat-bb@xxxxx.xxx>
Message-ID: <68883766A5E346D19541758B3ED02D5B@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Eric,
>>Are those who are working AO-51 mode L/S mostly using rotors and tracking
software?
Yes, though in some cases the rotators are "Armstrong Rotators." That is,
hand-held antennas.
>> What are you using to keep the antennas pointed for mode L/S and what are
you using for antennas?
Any AZ-EL array will work fine. The beam widths are not that narrow. For
the S-band side, most people use a small dish, though AO-51 is so loud that
even a modest Yagi or loop Yagi is fine. For the L-band, a linear Yagi or a
helix. NOVA, SATPC32, Ham Radio Deluxe, or something like a TrakBox will
easily handle for pointing the antennas.
At these frequencies, the real need is for computer frequency control to
compensate for the Doppler. It can be done manually, but if you don't have
that, you are going to be spending a lot of time talking yourself back on
frequency, and giving and asking for repeats. SATPC32 of course works
perfectly, and the new, improved Ham Radio Deluxe has performed well.
Alan
WA4SCA
------------------------------
Message: 4
Date: Thu, 13 Nov 2008 14:49:13 -0500
From: "John Price" <n4qwf1@xxxxx.xxx>
Subject: [amsat-bb] ARR SP432VDG preamp w/choke FS
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<8d1b8e80811131149s826a54fg56d51af9ac2f3763@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I have this preamp forsale. It is still in the orginal sealed plastic
bag it came in. It has never been used. Here is the ARR webpage that
describes this preamp.
http://www.advancedreceiver.com/page7.html
The ferquency range is from 420-450mhz. It is choke protected for RF
pass thur up to 25 watts. I have the orginal paper work that came with
it. It sells new for around $124.95 with the added choke so I will
take $85.00 shipped to your door in the USA for it. Over seas shipping
I will have to ask buyer to pay. Paypal excepted. Thanks << John
--
N4QWF Amateur Radio Operator
AO-7,AO-27,SO-50,AO-51,VO-52,ISS
Internet N4QWF@xxxxx.xxx
Echolink nodes #110903 -L #388463
Formerly KC4AHW VK3FEZ
Amsat Member #27845
DXCC #33,478
VUCC SAT #135
WAS SAT #296
51 on AO-51 #13
LON -79.256 LAT 37.459 Grid FM07il
>From the Foothills of the Blueridge
*Life should not be a journey to the grave with the intention of
arriving safely in a pretty and well preserved body, but rather to
skid in broadside, thoroughly used up, totally worn out, and loudly
proclaiming - "WOW, What a ride!"
------------------------------
Message: 5
Date: Thu, 13 Nov 2008 14:52:19 -0500
From: "Mark Lunday, WD4ELG" <mlunday@xx.xx.xxx>
Subject: [amsat-bb] Looking for some guidance on controlling cheap
Radio Shack rotator
To: <amsat-bb@xxxxx.xxx>
Message-ID: <006001c945c9$566f5650$034e02f0$@xx.xxx>
Content-Type: text/plain; charset="us-ascii"
Bought a $55 special TV rotator from my local Radio Shack, and I would like
to use something to control Azimuth (Elevation is obviously fixed, I have it
at 30 degrees which seems OK for my use). It has three screw posts
(probably +/- DC voltage and ground for motor control?)
I have an older PC with a parallel port (serial port is used to control the
rig). What pre-existing interfaces between parallel port and the screw
posts of the rotator are available? I don't have the time to build my own
kit, and would rather buy off-the-shelf solution.
Thanks.
Mark Lunday
WD4ELG
wd4elg@xxxx.xxx
http://wd4elg.net
------------------------------
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End of AMSAT-BB Digest, Vol 3, Issue 589
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