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CX2SA > SATDIG 09.12.08 00:32l 551 Lines 16827 Bytes #999 (0) @ WW
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Sent: 081208/2226Z @:CX2SA.LAV.URY.SA #:55741 [Minas] FBB7.00e $:55741_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. ISS 9600 pass @ 12.27utc (David Barber)
2. Re: AMSAT-BB Digest, Vol 3, Issue 638 (n3tl@xxxxxxxxx.xxxx
3. Jamaica - FK18 and FK08 possibly on sat this coming weekend
(Bill Dzurilla)
4. Re: Question re rx/tx relays and diplexer (i8cvs)
5. Re: D-STAR repeater problems in Copenhagen (OZ1MY)
6. RECHERCHE TRANSISTOR... (Tim Goodrich)
7. Re: AO-7 Mode A Antenna? (i8cvs)
8. 9600 baud packet tests (ISS and PCSAT) (Robert Bruninga)
9. Re: D-STAR repeater problems in Copenhagen (Nate Duehr)
10. Re: 9600 baud packet tests (ISS and PCSAT) (ryan woods)
----------------------------------------------------------------------
Message: 1
Date: Mon, 8 Dec 2008 12:48:25 -0000
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] ISS 9600 pass @ 12.27utc
To: <amsat-bb@xxxxx.xxx>, <sarex@xxxxx.xxx>
Message-ID: <D8C11E97E7034533A41D06EC21BADB8A@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
First station seen via ISS 9600 packet. (Still on 145.800MHz)
EB1GKS
Regards
David
G8OQW
------------------------------
Message: 2
Date: Mon, 08 Dec 2008 13:31:53 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 3, Issue 638
To: "Tim Goodrich" <tim@xxxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID:
<120820081331.16392.493D21C9000341360000400822193100029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey Tim,
I believe most all of the currently available digital recorders will handle
MP3 recording. The little recorder I use is too old for that, but I found some
freeware on the Web called Kat MP3 Recorder that I'm enjoying very much for a
couple of reasons:
1 - It's pretty full featured.
2 - It records durect to an MP3 file.
I like this approach because it allows me to edit pretty much on the fly. If I
have a contact in the middle of a pass that I want to save, I can note the
start and end time on the recorder, then "edit on the fly" use the Kat
software.
Tim - N3TL
-------------- Original message from "Tim Goodrich" <tim@xxxxxxxxxxx.xxx>: ---
-----------
> Speaking of recording the passes on a digital recorder (MP3), can anyone
> recommend an inexpensive mp3 recorder that will allow you to record direct
> from an HT's audio output line?
>
> Thanks,
> Tim
> KC2DDS
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of amsat-bb-request@xxxxx.xxx
> Sent: Sunday, December 07, 2008 4:13 PM
> To: amsat-bb@xxxxx.xxx
> Subject: AMSAT-BB Digest, Vol 3, Issue 638
>
> Send AMSAT-BB mailing list submissions to
> amsat-bb@xxxxx.xxx
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://amsat.org/mailman/listinfo/amsat-bb
> or, via email, send a message with subject or body 'help' to
> amsat-bb-request@xxxxx.xxx
>
> You can reach the person managing the list at
> amsat-bb-owner@xxxxx.xxx
>
> When replying, please edit your Subject line so it is more specific than
> "Re: Contents of AMSAT-BB digest..."
>
> _______________________________________________
> 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: 3
Date: Mon, 8 Dec 2008 06:14:36 -0800 (PST)
From: Bill Dzurilla <billdz.geo@xxxxx.xxx>
Subject: [amsat-bb] Jamaica - FK18 and FK08 possibly on sat this
coming weekend
To: amsat-bb@xxxxx.xxx
Cc: fm-satellite@xxxxxxxxxxx.xxx
Message-ID: <676556.98974.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Listen for me from FK18 and (less likely) FK08 on 12/12-14 Friday evening,
Saturday, and Sunday morning. No promises, but I'll be there on business and
will try to work a few AO-51 and SO-50 passes with an HT and Arrow antenna.
73, Bill NZ5N
------------------------------
Message: 4
Date: Mon, 8 Dec 2008 16:30:14 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Question re rx/tx relays and diplexer
To: "Curt Nixon" <cptcurt@xxxxx.xxx>, "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <001d01c95949$de3a09c0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Curt Nixon" <cptcurt@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, December 07, 2008 7:23 PM
Subject: [amsat-bb] Question re rx/tx relays and diplexer
> Good Afternoon All:
>
> I am working on packaging and interconnections for a mast-mounted unit
> for my 70cm system.
>
> My plan now is to place the preamp, a diplexer, and t/r relay all inside
> a single aluminum box.
>
> In and out will be N connectors.
>
> Internally, I am thinking of SMA links and pigtails.
>
> My 70 cm rig can produce a maximum of 35watts right now.
>
> Do commercial coaxial relays for t/r use short the rx line when in tx?
> or do they leave it float?
>
Hi Curt KU8L
Commercial Tohtsu coaxial relay model CX 520 D shorts to ground the
RX line when in TX and the TX line when in RX with 53 dB of insulation
between ports at 500 MHz but be carefull because if your preamplifier is
not unconditionally stable it can autoscillate when the input is grounded.
There are commercially availabe relays that connect a built in 50 ohm
termination to the RX line when in TX but the insulation is less.
> Also, should the 2M output on the diplexer for desense be terminated? or
> left open.
>
It is not strictly necessary but if you have a 50 ohm termination availabe
use it
> Finally, what type small coax would be appropriate for use inside this
> box between modules?
>
Since you plan to use SMA connectors the RG 188 flexible teflon coax cable
can be used into the box with suitable SMA connectors.
> Main feedline is LMR400.
>
> Thanks
>
> Curt
> KU8L
73" de
i8CVS Domenico
------------------------------
Message: 5
Date: Mon, 8 Dec 2008 17:33:46 +0100
From: "OZ1MY" <oz1my@xxxxxx.xx>
Subject: [amsat-bb] Re: D-STAR repeater problems in Copenhagen
To: "Trevor" <m5aka@xxxxx.xx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <003a01c95952$bdf65e80$6401a8c0@xxxxxx.xx>
Content-Type: text/plain; charset="utf-8"
Hi Graham, Trevor and David and the rest of the "listeners" on the amsat-bb
Thanks for the answers.
I may return to this subject later - but I found a very interesting
homepage:
http://utahvhfs.org/dstar_testing.html
It looks like a very solid piece of work to me.
73 OZ1MY
Ib
----- Original Message -----
From: "Trevor" <m5aka@xxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, December 08, 2008 12:52 AM
Subject: [amsat-bb] Re: D-STAR repeater problems in Copenhagen
> D-STAR repeaters should theoretically be less of a problem on 145.7875 MHz
than 2.5 kHz deviation FM repeaters as they have a slightly narrower
bandwidth.
>
> The use of 145.7875 assumes that people are using 2.5 kHz deviation FM
radios fitted with filters with an 8 kHz bandwidth at -6db and max 16 kHz BW
at -60 db, however, in practice most Amateur rigs don't meet that spec.
Realistically anyone within 15 km of an FM or D-STAR repeater on 145.7885 is
going to find the ISS downlink gets clobbered.
>
> The IARU bandplan allocates 145.800-146.000 MHz to the Amateur Satellite
service, doppler causes the 5 kHz deviation ISS signal to be below 145.8
thus there is a conflict with the IARU Region 1 2.5 kHz deviation FM
repeater output channel on 145.7875.
>
> Lets hope that eventually the ICOM and Kenwood NXDN? 6.25 kHz channel
spacing Digital Voice standard is adopted for 2 metre repeaters as a
replacement for FM with an upper channel limit of 145.7875 MHz.
>
> 73 Trevor M5AKA
>
> --- On Sun, 7/12/08, G0MRF@xxx.xxx <G0MRF@xxx.xxx> wrote:
>
> > From: G0MRF@xxx.xxx <G0MRF@xxx.xxx>
> > Subject: [amsat-bb] Re: D-STAR repeater problems in Copenhagen
> > To: oz1my@xxxxxx.xxx amsat-bb@xxxxx.xxx
> > Date: Sunday, 7 December, 2008, 11:28 PM
> > Hello Ib.
> >
> > Interesting allocation for D-Star.
> >
> > -60dB at 145.800 may sound suitable, but in practice what
> > matters is how
> > many dB down it is at 145.800 minus one half of the
> > bandwidth of your IF filter.
> >
> > Ball park.........
> > So -4kHz of doppler and -7.5kHz for a narrow FM filter
> > gives your receivers
> > bandpass down to 145.7885 MHz just 10k above the D-Star
> >
> > Which means the two are probably going to overlap.
> >
> > 73
> >
> > David
> >
> >
> >
> >
> > In a message dated 07/12/2008 20:34:56 GMT Standard Time,
> > oz1my@xxxxxx.xx
> > writes:
> >
> >
> > The theoretic spectrum should be more than 60 dB down
> > on 145.800 MHz,but that does not seem to be the case.
> > Including doppler the downlink from ISS is 145.796 MHz,
> > when
> > it is going away from us to the East, which is the
> > direction
> > of the repeater :-(
> >
> > Personally I am just 6 km away from the repeater with
> > no obstructions on the pass from it.
> >
> >
> >
> >
> > _______________________________________________
> > 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: Mon, 8 Dec 2008 09:18:05 -0800
From: "Tim Goodrich" <tim@xxxxxxxxxxx.xxx>
Subject: [amsat-bb] RECHERCHE TRANSISTOR...
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000901c95958$ef11b900$cd352b00$@xxx>
Content-Type: text/plain; charset="us-ascii"
Je pense que vous trouvez des informations ici.
http://forums.qrz.com/showthread.php?t=178270
Tim
KC2DDS
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of amsat-bb-request@xxxxx.xxx
Sent: Monday, December 08, 2008 4:31 AM
To: amsat-bb@xxxxx.xxx
Subject: AMSAT-BB Digest, Vol 3, Issue 639
Send AMSAT-BB mailing list submissions to
amsat-bb@xxxxx.xxx
To subscribe or unsubscribe via the World Wide Web, visit
http://amsat.org/mailman/listinfo/amsat-bb
or, via email, send a message with subject or body 'help' to
amsat-bb-request@xxxxx.xxx
You can reach the person managing the list at
amsat-bb-owner@xxxxx.xxx
When replying, please edit your Subject line so it is more specific than
"Re: Contents of AMSAT-BB digest..."
------------------------------
Message: 7
Date: Mon, 8 Dec 2008 18:51:40 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: AO-7 Mode A Antenna?
To: "Sebastian" <w4as@xxxxxxxxx.xxx>, "AMSAT BB" <AMSAT-BB@xxxxx.xxx>
Message-ID: <005201c9595d$a0a26e40$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Sebastian" <w4as@xxxxxxxxx.xxx>
To: "AMSAT BB" <AMSAT-BB@xxxxx.xxx>
Sent: Sunday, December 07, 2008 9:14 PM
Subject: [amsat-bb] AO-7 Mode A Antenna?
> I have a Yaesu FT-847 which is dedicated for satellite work, so I
> don't have any HF antennas connected to it.
>
> I'd like to know from those on the group who are (were) using AO-7
> Mode A (10 meter receive), what type of antenna you are using?
Hi Sebastian, W4AS
Since OSCAR-6 I am using a homebrew 29.5 MHz turnstile i.e two
crossed dipoles each with gamma match and a delay line to get RHCP
polarization upword.
Please note that the polarization of a turnstile is linear horizontal at
low angles toward the horizon.
Both crossed dipoles are horizontally mounted over my terrace at about
1/4 wave over the flat surface of it and hopefully the iron casted into the
prestressed concrete act as a reflector.
In a separate email I have sent to you a draving and a picture of it.
>
> I really don't want to get a directional antenna for several reasons.
> Also, is it possible to receive Mode A without the use of an external
> preamp?
About the use of a preamplifier on 10 meters this matter has been discussed
several time on the Amsat-BB as in my letter "Re:Preamp advice, pse" sent
november 04 ,2008
>
> 73 de W4AS
> Sebastian
>
73" de
i8CVS Domenico
------------------------------
Message: 8
Date: Mon, 8 Dec 2008 13:00:43 -0500
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] 9600 baud packet tests (ISS and PCSAT)
To: <david.barber@xxxxxxxxxxxxx.xx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <E9D1C04EB4E54816912497E45322B149@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Amusing anecdote of a day-in-the-life of a ham:
I Just saw this on AMSAT-bb:
> I managed to get digipeated via the 9600
> system during the 10.52utc UK pass.
Ah ha! Now that explains my morning!:
This morning as we prepare to restore PCSAT for operations when
it comes into full sun, I tried to logon as usual. The logon
proceess went OK, but seemed "different" than usual. Then I
realized I had logged on accidently via the UHF uplink and at
9600 baud! (because the radio was accidentally left in 9600).
I have never used that login technique before in 7 years of
operating PCSAT.
SO I thought, wow, that was nice.... So I'll just send the
first most important restoration command and see how this
goes... That first command is always "00110111" to turn off the
two spare UHF receivers which are a constant drain on the
battery and why Pcsat cannot remain power positive without help.
The link seemed to fail, and I began to notice lots of retries
on my end..... Duh... Turning off the 9600 baud UHF backup
receivers when that's what I used to connect with was not the
smartest thing to do.
Anyway, I got re-connected on 2m and 1200 baud and proceeded to
turn off additional loads and beacons. But I was still hearing
an occasional 9600 baud burst, and couldn't figure out what I
had left on.
So now I realize the 9600 baud bursts I was hearing was not from
PCSAT but from ISS. And since the report above says they were
on 145.800, probably I was hearing them from another radio in
the shack that is always monitioring the ISS downlink on .800.
I just checked Instantrack and sure enough, ISS and PCSAT were
in view at the same time.
This will be fun. I suppose we could turn on one UHF 9600 baud
link on PCSAT if anyone wanted to play with it. PCSAT can cross
digipeat from 1200 to 1200, 1200 to 9600 or 9600 to 1200 or from
VHF-to-VHF or UHF-to-VHF. We just have never found much more
use for it other than the usual simplex 145.825 digipeating. SO
much simpler to explain that way.
Bob, Wb4APR
------------------------------
Message: 9
Date: Mon, 08 Dec 2008 12:15:44 -0700
From: Nate Duehr <nate@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: D-STAR repeater problems in Copenhagen
To: OZ1MY <oz1my@xxxxxx.xx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <493D7260.6040802@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
OZ1MY wrote:
> Hi all,
> During December and during the last large activity on
> the ISS, some of us here in Copenhagen have had problems
> with a D-STAR repeater on 145.7875 MHz.
> Do any of you have a measurement of the spectrum of
> the D-STAR transmissions ?
>
> The theoretic spectrum should be more than 60 dB down
> on 145.800 MHz,but that does not seem to be the case.
> Including doppler the downlink from ISS is 145.796 MHz, when
> it is going away from us to the East, which is the direction
> of the repeater :-(
>
> Personally I am just 6 km away from the repeater with
> no obstructions on the pass from it.
>
> To avoid flames - no I have nothing against D-STAR :-)
>
> 73 OZ1MY
> Ib
The Utah VHF group seems to have done the most (published) scientific
research.
http://utahvhfs.org/
http://utahvhfs.org/dstar.html
http://utahvhfs.org/freqfaq1.shtml#dstar_narrow
http://utahvhfs.org/dstar_channel_spacing.html
Nate WY0X
------------------------------
Message: 10
Date: Mon, 8 Dec 2008 11:21:17 -0800 (PST)
From: ryan woods <kd8atf@xxxxx.xxx>
Subject: [amsat-bb] Re: 9600 baud packet tests (ISS and PCSAT)
To: amsat-bb@xxxxx.xxx
Message-ID: <959102.71859.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
hey bob its ok we all make mistakes i would love to try the uhf 9600 via
pcsat. i have always wanted to try that from the time i have tried pcsat. it
will be fun.
?
?
?
73 kd8atf
Fort Ashby wv FM09om
------------------------------
_______________________________________________
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 640
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