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CX2SA > SATDIG 25.10.08 21:31l 255 Lines 8798 Bytes #999 (0) @ WW
BID : 43390_CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V3 553
Path: IZ3LSV<IK2XDE<F5GOV<F4BWT<YO6PLB<CX2SA
Sent: 081025/1928Z @:CX2SA.LAV.URY.SA #:43390 [Minas] FBB7.00e $:43390_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. AMSAT IRC? (Scott Schmautz)
2. echolink-Amsat Symposium (Mr Jeffrey L Ross)
3. Re: echolink-Amsat Symposium (Andrew Glasbrenner)
4. Re: FO-29 telemetry status? (Mike Rupprecht)
5. Re: Questions on practical aspects of coax and preamps.
(Edward Cole)
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Message: 1
Date: Sat, 25 Oct 2008 12:52:33 -0400
From: "Scott Schmautz" <wb2uzr@xxxxx.xxx>
Subject: [amsat-bb] AMSAT IRC?
To: amsat-bb@xxxxx.xxx
Message-ID:
<11b740b70810250952k7f66242eo8b9a24d8aef303ce@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
What is the process to get on the AMSAT IRC channel?
Scott/WB2UZR
--
"I am so clever that sometimes I don't understand a single word of what I am
saying."
Oscar Wilde
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Message: 2
Date: Sat, 25 Oct 2008 13:26:15 -0400
From: "Mr Jeffrey L Ross" <radiooperator@xxxxxxx.xxx>
Subject: [amsat-bb] echolink-Amsat Symposium
To: "amsat" <amsat-bb@xxxxx.xxx>
Message-ID: <216F4549DF9E473BB7AF4C3904632935@xxxxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi folks, was listening here via echolink but it quit, I thought they were
quiting for lunch break, but according to the schedule they should come back
at 1300 est. I hear nothing, Are they only going to echolink some of it or
does anyone know when it will come back on or what is the schedule. tks
kc8gkf
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Message: 3
Date: Sat, 25 Oct 2008 13:38:53 -0400
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: echolink-Amsat Symposium
To: "Mr Jeffrey L Ross" <radiooperator@xxxxxxx.xxx>, "amsat"
<amsat-bb@xxxxx.xxx>
Message-ID: <985D2F0B8C5A4560B4A40D4E690ADCD0@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
The general meeting was the only part planned to be put on Echolink as far
as I know.
73, Drew
----- Original Message -----
From: "Mr Jeffrey L Ross" <radiooperator@xxxxxxx.xxx>
To: "amsat" <amsat-bb@xxxxx.xxx>
Sent: Saturday, October 25, 2008 1:26 PM
Subject: [amsat-bb] echolink-Amsat Symposium
> Hi folks, was listening here via echolink but it quit, I thought they were
> quiting for lunch break, but according to the schedule they should come
> back
> at 1300 est. I hear nothing, Are they only going to echolink some of it or
> does anyone know when it will come back on or what is the schedule. tks
> kc8gkf
>
>
> _______________________________________________
> 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: 4
Date: Sat, 25 Oct 2008 20:28:59 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
Subject: [amsat-bb] Re: FO-29 telemetry status?
To: <deyoung_james@xxxxx.xxx>, "'amsat-bb'" <amsat-bb@xxxxx.xxx>
Cc: 'Jim DeYoung' <n8oq@xxxx.xxx>
Message-ID: <008201c936cf$8c8582e0$a59088a0$@xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jim,
can't verify that. Nothing heard from GO-32 over Europe in the last pass
(1800 UTC)
73, Mike
DK3NW
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Im
Auftrag von DeYoung James
Gesendet: Samstag, 25. Oktober 2008 18:25
An: amsat-bb
Cc: Jim DeYoung
Betreff: [amsat-bb] FO-29 telemetry status?
Greetings,
Does anyone know if there are problems with FO-29's telemetry system? The
structure temperatures seems to be very cold during the daytime portion of
the passes here, even allowing for the long eclipse periods. All four
structure temperatures are about -12 with one structure temperature jumping
to +13 on one pass.
DK3WN's 6 Oct captured telemetry on his web site blog page seems to confirm
these very low temperatures at least on that date.
Anyone have any other information on this?
Thank you.
Jim (N8OQ)
_______________________________________________
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!
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------------------------------
Message: 5
Date: Sat, 25 Oct 2008 10:46:12 -0800
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Questions on practical aspects of coax and
preamps.
To: Curt Nixon <cptcurt@xxxxx.xxx>, Amsat <AMSAT-BB@xxxxx.xxx>
Message-ID: <200810251846.m9PIkCY3005620@xxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Curt,
I'll add my comments to those already given.
At 05:00 AM 10/25/2008, Curt Nixon wrote:
>Good Morning All:
>
>So, after this last week of ISS fun, I have the bug to upgrade into some
>simple satellite work. I will be confined to simple FM untill I can
>upgrade to all-mode rigs. My question is on coax and preamps.
>
>I will use a pair of vertically polarized yagis to begin with. One for
>144MHz and one on 70cm. I have some LMR 400 I got for the ISS project
>on 144 but it is so stiff, I didn't use it.
>
>1. If you use LMR 400, do you add flexible sections at the antenna end
>and in the shack, using LMR400UF?
>Or, should I just use all UF and forget the additional connections? The
>cost of the additional connectors (N) both in loss and $$ is probably
>advantage $ for UF. Not sure about the loss potential for adding two
>sets of interface connections.
I use LMR-400 with LMR-400UF jumpers to go around my az-el
rotors. Losses in properly made connectors is negligible and the
extra loss in a few feet of LMR-400UF is also negligible. It does
cost you a few more connectors. BTW this is what I am using for the
Rx side of me 2m-eme system. I do use N-female connectors one end of
the jumper to eliminate having to insert a "barrel" adapter between
two male connectors. N connectors are very good on all frequencies
in use on satellites and have some wx-sealing properties (but one
should still use two layers of electrical tape or coax seal or the like).
>2. With a 5-7 element yagi on 144, is it really necessary to use low
>loss coax as a opposed to 8x or 8x mini.
>Runs here are 35' if munted at 12' and 60' if mounted to roof tower at
>about 20'
35-ft of mini-8 (RG-8x) still is lossy so it is better to use low
loss cable. The longer run it becomes more important. Realise that
in transmit on 145-MHz you will lose RF power in the coax. If you
only have a 5w HT that might become critical. If you have a 10 or 25
or 50w radio, you have power to throw away so on Tx the mini-8 would
probably be fine.
>3. On 70cm, I plan to add a mast preamp, but will use the yagi
>"barefoot" to begin with. With a preamp at the antenna, is low loss
>coax still required or can the cost increment be put to better use in
>the preamp to begin with? The preamp of course also gives a convenient
>place for a connector interface from stiff to flexible if desired.
Once you have a preamp at the antenna, then RG-58 is adequate between
the preamp and radio. If the preamp is used in the radio shack after
a run of coax then low-loss cable will make a huge difference. But
seriously, the preamp belongs at the antenna or you are throwing away
most of the advantatge that the low noise figure provides.
Without a preamp low loss coax is important for the same reasons as
given above about using the preamp in the shack. Using the LMR-400
would make a lot of difference on the UHF Rx side. Beyond a run of
75 or 100 feet maximum, you will do better with 1/2 or 7/8 inch
hardline. This is another good reason to just mount the preamp at
the antenna (you do not need "super" coax).
On my eme system Hardline is used on the Tx side to get my RF to the
antennas with minimum loss. The preamp is mounted close the antenna
so I run 150-feet of LMR-400 back to the receiver. EME requires much
more attention to miniming losses and maximizing performance.
***********************************************************
73, Ed - KL7UW BP40iq, 6m - 3cm
144-EME: FT-847, mgf-1801, 4x-xp20, 185w
1296-EME: DEMI-Xvtr, 0.30 dBNF, 4.9m dish, 60W
http://www.kl7uw.com AK VHF-Up Group
NA Rep. for DUBUS: dubususa@xxxxxxx.xxx
***********************************************************
------------------------------
_______________________________________________
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 3, Issue 553
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