| |
CX2SA > SATDIG 19.12.08 23:22l 473 Lines 15616 Bytes #999 (0) @ WW
BID : 59668_CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V3 659
Path: IZ3LSV<IK2XDE<DB0RES<DK0WUE<SV1CMG<SV1CMG<CX2SA
Sent: 081219/2215Z @:CX2SA.LAV.URY.SA #:59668 [Minas] FBB7.00e $:59668_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. ao-7 next pass (w7lrd@xxxxxxx.xxxx
2. Majel Barrett 1932-2008 (laura halliday)
3. Re: [sarex] Re: ISS Packet 13.44utc UK Pass (Sil - ZL2CIA)
4. Re: [sarex] Re: ISS Packet 13.44utc UK Pass (Sil - ZL2CIA)
5. Re: Majel Barrett 1932-2008 (Mark Lunday, WD4ELG)
6. Re: what is QRP (Edward Cole)
7. Kantronics Data engine batt/backup (Peter Gibson)
8. ISS Packet 07.50utc UK Europe Pass (David Barber)
9. ISS Pass 09.25 UK Europe (David Barber)
10. ISS Packet 11.00utc UK Europe (David Barber)
11. AO7 G1WPR (k3szh@xxxxxxx.xxxx
12. Re: what is QRP (Nate Duehr)
13. SatPC32 track error help (Leonard Revelle)
----------------------------------------------------------------------
Message: 1
Date: Thu, 18 Dec 2008 20:25:51 +0000
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] ao-7 next pass
To: AMSAT-BB@xxxxx.xxx (AMSAT-BB)
Message-ID:
<121820082025.24032.494AB1CF000F021E00005DE022120207840B9D04C999@xxxxxxx
.xxx>
Content-Type: text/plain
Hello
The next pass at 2137Z of AO-7 we will have a mutual window from Seattle WA.
(CN87) to northern UK, if you would like to try and "stretch " the footprint I
will be 145.958. Also OH, LZ, and SM. Mika is there often.
73 Bob W7LRD
Seattle
--
"if this were easy, everyone would be doing it"
------------------------------
Message: 2
Date: Thu, 18 Dec 2008 15:40:35 -0800
From: laura halliday <marsgal42@xxxxxxx.xxx>
Subject: [amsat-bb] Majel Barrett 1932-2008
To: <amsat-bb@xxxxx.xxx>
Message-ID: <BAY119-W26551A4ED5A3BAA07A875EAEF30@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I just read in the news that Majel "Number One"/"Christine Chapel"/
"Lwaxana Troi"/"Computer Voice" Barrett-Roddenberry died today.
She will be missed.
I was a kid in the 1960s and was inspired by a number of things to the
technical career I have today. Star Trek was one of those inspirations...
Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte
_________________________________________________________________
------------------------------
Message: 3
Date: Sat, 20 Dec 2008 00:22:30 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: [sarex] Re: ISS Packet 13.44utc UK Pass
To: "Ransom, Kenneth G. (JSC-OC)[BAR]" <Kenneth.G.Ransom@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxxx sarex@xxxxx.xxx
Message-ID: <494B9206.7010005@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
To know if it is active, listen on 143.625 MHz (perhaps other
frequencies as well). You can hear the traffic (in Russian)
Sil
Ransom, Kenneth G. (JSC-OC)[BAR] wrote:
> When the Russian VHF communications system is active (usually in range
> of Russia), that can desense the amateur radio a bit making it harder to
> be heard.
>
>
> Kenneth - N5VHO
>
> --- snip ---
------------------------------
Message: 4
Date: Sat, 20 Dec 2008 00:34:50 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: [sarex] Re: ISS Packet 13.44utc UK Pass
To: amsat-bb@xxxxx.xxx
Message-ID: <494B94EA.1060609@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Oops, sorry for the cross-posting. I hit "Reply All" and didn't check
carefully enough where my mail was headed.
Sil
------------------------------
Message: 5
Date: Thu, 18 Dec 2008 22:02:14 -0500
From: "Mark Lunday, WD4ELG" <mlunday@xx.xx.xxx>
Subject: [amsat-bb] Re: Majel Barrett 1932-2008
To: "'laura halliday'" <marsgal42@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <000f01c96186$32083380$96189a80$@xx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Sad to hear of her passing, but she is now reunited with the love of her
life Gene Rodenberry, whose legacy continues to this day.
Mark Lunday
WD4ELG
wd4elg@xxxx.xxx
http://wd4elg.net
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of laura halliday
Sent: Thursday, December 18, 2008 6:41 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Majel Barrett 1932-2008
I just read in the news that Majel "Number One"/"Christine Chapel"/
"Lwaxana Troi"/"Computer Voice" Barrett-Roddenberry died today.
She will be missed.
I was a kid in the 1960s and was inspired by a number of things to the
technical career I have today. Star Trek was one of those inspirations...
Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte
_________________________________________________________________
_______________________________________________
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: Thu, 18 Dec 2008 22:11:43 -0900
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: what is QRP
To: amsat-bb@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <200812190711.mBJ7BhV4057037@xxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I'm coming into this discussion at mid-point, so making my apologies:
QRP as a term originated with low power ham stations on HF where
antenna gain is usually not that much. Mostly HF QRPers are using
dipole or other wire antennas having little gain. The definition of
HF QRP is <5w CW.
ON VHF (and satellites) antenna gain is easier to obtain due to the
smaller wavelength, so really one should combine transmitter power
with antenna gain to determine total RF power (technically, this is
called ERP). If you have a significant length of coax cable (loss)
that should also be factored in.
You can do it two ways: convert everything into watts and ratios or
everything into dBw and dB's.
I would say the convention for satellite QRP has become 5w and less
than 6-dB: that results in 5 x 4 = 20w ERP
or 7dBw + 6 dB = 13 dBw.
You may disagree with using 5w or the 6 dB gain figure, but QRP
should not be very high ERP in any case.
BTW the 3-element Arrow has about 6-dB gain.
For instance one would not consider 5w into a 16-foot dish on 1268 MHz as QRP:
The dish gain is ~ 32 dB or a ratio of approx 1585:1, so:
5 x 1585 = 7.9 kW ERP
7 dBw + 32 = 39 dBw
Note: that I have used gain over a dipole in these examples, whereas
normally space communication formula use dBi (isotropic gain). 1 dBd
= 2.15 dBi
Info that is probably useless: My four 2m eme yagis provide 19.2 dBd
and I run about 125w at the antenna terminals thus my ERP= 10.4 kW
For eme this IS considered QRP since the norm is an ERP of 100 kW for
Moonbounce.
Perhaps it is better for satellite controllers to indicate what the
maximum in power and antenna gain a station should use for uplink,
then no one is required to know how to calculate ERP.
73, Ed - KL7UW
At 08:22 AM 12/18/2008, Jim Danehy wrote:
>QRP folks do not ESTIMATE . . . . go to a VHF UHF convention and watch the
>antenna measurements . . . . of course you can SPECULATE or GUESS but that
>is the ambiguity that is introduced . . . a more accurate means of
>measuring QRP is the measurement of output power that has been in use by the
>amateur community for the six decades I have been around . . . antenna gain
>measurement is not simple . . . it is the execution of the assembly and
>construction ( the devil is in the details ) of an antenna . . . keep the
>guess work out of it . . . there was an advertisement some years ago for the
>ALPHA Amps . . . "life is too short for QRP" . . . if the goal is to set
>aside a frequency or repeater for challenged signals (compromised antennas
>and low power rigs ) that is fine . . . express it in the terms you want to
>convey . . . . QRP for most of the amateur community is measuring 5 watts
>output at the rig . . .if you want : tell them HT use only with Arrow, Elk,
>eggbeater and vertical antennas . . . . then you will effectively
>communicate your goal . . if that is your goal . . . . QRP is not a
>relevant term if you want to have a place for HTs with small compromised
>antennas . . . folks get lazy and use short cuts . . . unfortunately . . . .
>
>Jim W9VNE
>
>
>----- Original Message -----
>From: "Nigel Gunn G8IFF/W8IFF" <nigel@xxxxx.xxx>
>To: "Jim Danehy" <jdanehy@xxxxx.xx.xxx>
>Cc: <amsat-bb@xxxxx.xxx>
>Sent: Thursday, December 18, 2008 12:04 PM
>Subject: Re: [amsat-bb] what is QRP
>
>
> > QRP is not generally based on ERP.
> > It's usually taken to be 10W PEP SSB or 5W carrier power max for other
> > modes.
> >
> > I think QRP on sats used to be considered to be less than 10W ERP.
> > It's not difficult to estimate feeder loss and antenna gain.
> >
> >
> > Jim Danehy wrote:
> >> QRP is a measure of the transmitter output . . . on a practical basis how
> >> would an operator accurately measure the ERP if you were using ERP
> >> (effective radiated power) as a QRP benchmark . . . you would need
> >> instrumentation to measure the feedline losses and sophisticated
> >> instrumentation to measure the gain of an antenna . . . most of that type
> >> of instrumentation is beyond the average amateur radio operator . . . .
> >> but most do have access or use of a watt meter . . . . thus the simple
> >> way of calculating QRP . . . ERP is used primarily in satellite
> >> operations because it affects the transponders (not FM repeaters) I have
> >> had several private emails in response to my comments about QRP . . . I
> >> have seen folks operate the CQ WW CW contest in the QRP category with
> >> stacked beams or monoband beams . . . . I have never seen a definition of
> >> QRP that went into ERP . . . . they just use the transmitter output with
> >> all of the ambiguities that brings . . . have fun Jim W9VNE
> >> _______________________________________________
> >> 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
> >>
> >
> >
> > --
> > <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> > Nigel A. Gunn. G8IFF W8IFF (have also held KC8NHF, M0NHF, 9H3GN)
> > 1865 El Camino Drive, Xenia, OH 45385-1115, USA 937 825 5032
> > e-mail nigel@xxxxx.xxx www http://www.ngunn.net
> > Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
> > Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK, MKARS, ALC
> > <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> >
>
>_______________________________________________
>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: 7
Date: Fri, 19 Dec 2008 07:52:49 -0000
From: "Peter Gibson" <petergibson7@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Kantronics Data engine batt/backup
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <001801c961ae$ca0c0940$5e241bc0$@xxx>
Content-Type: text/plain; charset="us-ascii"
HI to all who looked at this question
On some data engines CR2430 is used on the earlier units
They switched to the smaller CR2032 later
Regards to all Pete G7LJA
------------------------------
Message: 8
Date: Fri, 19 Dec 2008 08:22:38 -0000
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] ISS Packet 07.50utc UK Europe Pass
To: <amsat-bb@xxxxx.xxx>, <sarex@xxxxx.xxx>
Cc: "'Ransom, Kenneth G. \(JSC-OC\)\[BAR\]'"
<Kenneth.G.Ransom@xxxx.xxx>
Message-ID: <A856FEC92CD447B1AAAFFB3D7F71831C@xxxxxxxx>
Content-Type: text/plain; charset="US-ASCII"
Strong signal as usual from ISS again this morning during the 07.50utc UK
pass. 1200bps on 145.825MHz.
But unable to get a single packet through and no stations heard, just the
ISS beacon.
Tried hitting it with a full 100w but nothing.
Something up there has changed.
Has the attitude of the station been changed / boosted since 17 December?
David
G8OQW
------------------------------
Message: 9
Date: Fri, 19 Dec 2008 09:38:47 -0000
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] ISS Pass 09.25 UK Europe
To: <amsat-bb@xxxxx.xxx>, <sarex@xxxxx.xxx>
Message-ID: <68BE5655E9F34FF0AE3112D5425597EB@xxxxxxxx>
Content-Type: text/plain; charset="US-ASCII"
1200bps on but not accessible again this pass. Beacon only.
Russian comms active on 143.625MHz.
D700 packet could be heard in the background.
David
G8OQW
------------------------------
Message: 10
Date: Fri, 19 Dec 2008 11:12:54 -0000
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] ISS Packet 11.00utc UK Europe
To: <amsat-bb@xxxxx.xxx>, <sarex@xxxxx.xxx>
Message-ID: <49532B99F12C4491A563587D01C8FD52@xxxxxxxx>
Content-Type: text/plain; charset="US-ASCII"
Back to normal this time.
Lots of activity.
No VHF comms.
David
G8OQW
------------------------------
Message: 11
Date: Fri, 19 Dec 2008 14:08:03 GMT
From: "k3szh@xxxxxxx.xxxx <k3szh@xxxxxxx.xxx>
Subject: [amsat-bb] AO7 G1WPR
To: amsat-bb@xxxxx.xxx
Message-ID: <20081219.060803.22897.0@xxxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Terry Congratulation on the fine achievement on 4000 plus oso's on AO7. It's
been a pleasure to be your old friend over the many many years on AO7. It has
been fun and I hope we can continue our almost daily qso's. Even Nancy said
Congratulation. I bet Kathy will trow a party hi hi.
73
Joe
Amsat 3788
____________________________________________________________
Click for huge discounts on pet food and supplies - up to 70% off
http://thirdpartyoffers.netzero.net/TGL2241/fc/PnY6rx9sj2kUMfR9il2XmUuA5CqHVmc
2o2iVYIO7lulpl21RVokKJ/
------------------------------
Message: 12
Date: Fri, 19 Dec 2008 11:26:30 -0700
From: Nate Duehr <nate@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: what is QRP
To: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <494BE756.2020709@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The standard joke still needs to be made:
"Life's too short for QRP."
Okay, back to the technical discussion about how to have a really crappy
signal...
(GRIN AND ROFL! -- JUST KIDDING QRP FANS!)
MERRY CHRISTMAS, AND HAPPY NEW YEAR!
Nate WY0X
------------------------------
Message: 13
Date: Fri, 19 Dec 2008 12:50:29 -0600
From: Leonard Revelle <n9ij@xxxxxxx.xxx>
Subject: [amsat-bb] SatPC32 track error help
To: AMSAT-BB@xxxxx.xxx
Message-ID: <901423B7-0AB3-48FE-8F16-C821CE9A0FEC@xxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
I have had this happen before and cannot remember how I fixed it.
Tried to track ISS today and the track is off. Both the computer and
SatPC32 show the correct time and date. Latest Keps have been
downloaded. I am hearing ISS packets but the computer says it is over
the southern-Indian Ocean.
Any sugggestions (I'll write 'em in bold letters on the wall for next
senior moment!)?
Len Revelle N9IJ
n9ij@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 659
****************************************
Read previous mail | Read next mail
| |
