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CX2SA > SATDIG 29.10.09 06:04l 858 Lines 29394 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. using a microsat as a potential high altitude VHF reflector
(Samudra Haque)
2. Re: using a microsat as a potential high altitude VHF
reflector (Rocky Jones)
3. Re: using a microsat as a potential high altitude VHF
reflector (Andrew Glasbrenner)
4. Sat status update (Andrew Rich)
5. Re: using a microsat as a potential high altitude
VHFreflector (jmfranke)
6. Re: using a microsat as a potential high altitude VHF
reflector (Rocky Jones)
7. Re: using a microsat as a potential high altitude VHF
reflector (Andrew Glasbrenner)
8. W6FOG Schedule (w6zkh@xxxxxxx.xxxx
9. Re: FS item (Arrow) (Mark L. Hammond)
10. Survey: Top 250 grids (Jeff Yanko)
11. Centerfire Yagi antennas (Michael Tondee)
12. Re: using a microsat as a potential high altitude
VHFreflector (i8cvs)
13. Re: Centerfire Yagi antennas (Jim Jerzycke)
14. Re: using a microsat as a potential high altitude
VHFreflector (Samudra Haque)
15. Re: Hopefully - Some ITAR Clarifications. (Nigel Gunn)
16. FT-897D - WFM (Randy)
17. Stealth Satellite Station? (Kent Frazier)
----------------------------------------------------------------------
Message: 1
Date: Wed, 28 Oct 2009 15:46:34 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] using a microsat as a potential high altitude VHF
reflector
To: Amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<d8c724880910281246r7afca252k35cc1ab5dbc0c135@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Hi all,
I read with interest an article on the web "ECHO - America's First
Communications Satellite" By John R. Pierce which is available here:
http://www.smecc.org/john_pierce___echoredo.htm
I know ham radio operators love using their hand helds to communicate
using active transponders or active repeaters in space... no issue
with that.
were there any ham radio projects (either through amsat-na or abroad)
that implemented a passive reflector on an orbital vehicle like
Project Echo
I quote from
http://www.satmagazine.com/cgi-bin/display_article.cgi?number=490218137
The Echo-1 Balloon Satellite as it sits, fully inflated, at a Navy
hangar in Weeksville, North Carolina. The spacecraft measured 100 feet
across when deployed, and was nicknamed a ?satelloon? by those
involved in the project. The mylar film balloon acted as a passive
communications reflector for transcontinental and intercontinental
telephone (voice), radio and television signals. Echo 1 re-entered the
atmosphere May 24, 1968.
What strikes me is the implications of a large large very large
antenna (reflector), if only it could be reflective on one side of the
sphere only .... (any ideas?)
The Echo 2 was a 135-foot rigidized inflatable balloon satellite. The
satellite is shown undergoing tensile stress test in a dirigible
hanger at Weekesville. The satellite, 50 times more rigidized than
Echo I. When folded, the satellite is packed into the 41-inch diameter
canister shown in the foreground.
Did early amsat folks consider duplicating / adding to any of these
projects or launch their own 'satelloon' that did not carry an active
RF payload ? Could we outfit one of our future microsats to provide a
reflector to aid in Earth-LEO DXing like meteor-scatter ?
73 de Samudra, N3RDX
------------------------------
Message: 2
Date: Wed, 28 Oct 2009 15:11:35 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHF reflector
To: <samudra.haque@xxxxx.xxx>, Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W649B068A0BC92BEC66D14FD6B80@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
There are two neat concepts from the early days of communications
experiments using satellites and Echo is one of them (the other is SCORE).
There were a lot of "ideas" for follow on echos...one used a gravity
gradient "pole" to stop the balloon from spinning and keeping it pointed to
the earth, allowing a directional reflector to be installed in the
balloon...another used a radar reflector like concept inside the balloon to
increase the amount of DB that returned...
The problems were "large" however. Doppler shift and tracking were issues
at the time (and probably still are)..the antennas were going to have to be
large (really large).
My elmer in Dallas when he was in the USAF did some radar experiments with
echo...I got to see it a few times.
SCORE probably has more relevance to todays possibilities.
Robert WB5MZO
_________________________________________________________________
New Windows 7: Find the right PC for you. Learn more.
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T:WLMTAGL:ON:WL:en-US:WWL_WIN_pcscout:102009
------------------------------
Message: 3
Date: Wed, 28 Oct 2009 16:12:54 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHF reflector
To: Samudra Haque <samudra.haque@xxxxx.xxx>
Cc: Amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID: <4AE8A5C6.7080606@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
>
> were there any ham radio projects (either through amsat-na or abroad)
> that implemented a passive reflector on an orbital vehicle like
> Project Echo
>
>
Not long ago I saw some webpages and emails about some hams using ISS
(or was it Mir?) as a passive reflector.
Coincidently, I was reading about the West Ford project, which was
launches of millions of small wire dipoles to be used as reflectors.
Some of those clusters are still in orbit. I wonder if they are still in
a dense enough field to reflect the 8 Ghz? signal they were designed for.
73, Drew KO4MA
------------------------------
Message: 4
Date: Thu, 29 Oct 2009 06:14:18 +1000
From: "Andrew Rich" <vk4tec@xxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Sat status update
To: <amsat-bb@xxxxx.xxx>
Cc: TAPR APRS Mailing List <aprssig@xxxx.xxx>
Message-ID: <E2105DDA0C2C4860B5FEE6B1FD73C4D9@xxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello
I have tidied things up a bit and added a graph for ISS
Please let me know if you would like to see a satellite added
http://vk4tec.no-ip.org/sat_status/
Andrew VK4TEC
------------------------------
Message: 5
Date: Wed, 28 Oct 2009 16:17:10 -0400
From: "jmfranke" <jmfranke@xxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHFreflector
To: "Samudra Haque" <samudra.haque@xxxxx.xxx>, "Amsat-bb"
<amsat-bb@xxxxx.xxx>
Message-ID: <7E8F2682A3B541ACB7B245ABA569A33E@xxxxxx>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
reply-type=original
One drawback of the design was the high drag from such a large structure,
coupled with the low mass. The end result was a satellite with a low
ballistic coefficient and hence a short lifetime.
John WA4WDL
--------------------------------------------------
From: "Samudra Haque" <samudra.haque@xxxxx.xxx>
Sent: Wednesday, October 28, 2009 3:46 PM
To: "Amsat-bb" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] using a microsat as a potential high altitude
VHFreflector
> Hi all,
>
> I read with interest an article on the web "ECHO - America's First
> Communications Satellite" By John R. Pierce which is available here:
> http://www.smecc.org/john_pierce___echoredo.htm
>
> I know ham radio operators love using their hand helds to communicate
> using active transponders or active repeaters in space... no issue
> with that.
>
> were there any ham radio projects (either through amsat-na or abroad)
> that implemented a passive reflector on an orbital vehicle like
> Project Echo
>
> I quote from
> http://www.satmagazine.com/cgi-bin/display_article.cgi?number=490218137
>
> The Echo-1 Balloon Satellite as it sits, fully inflated, at a Navy
> hangar in Weeksville, North Carolina. The spacecraft measured 100 feet
> across when deployed, and was nicknamed a ?satelloon? by those
> involved in the project. The mylar film balloon acted as a passive
> communications reflector for transcontinental and intercontinental
> telephone (voice), radio and television signals. Echo 1 re-entered the
> atmosphere May 24, 1968.
>
>
> What strikes me is the implications of a large large very large
> antenna (reflector), if only it could be reflective on one side of the
> sphere only .... (any ideas?)
>
> The Echo 2 was a 135-foot rigidized inflatable balloon satellite. The
> satellite is shown undergoing tensile stress test in a dirigible
> hanger at Weekesville. The satellite, 50 times more rigidized than
> Echo I. When folded, the satellite is packed into the 41-inch diameter
> canister shown in the foreground.
>
> Did early amsat folks consider duplicating / adding to any of these
> projects or launch their own 'satelloon' that did not carry an active
> RF payload ? Could we outfit one of our future microsats to provide a
> reflector to aid in Earth-LEO DXing like meteor-scatter ?
>
>
>
> 73 de Samudra, N3RDX
>
> _______________________________________________
> 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: Wed, 28 Oct 2009 16:03:26 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHF reflector
To: <glasbrenner@xxxxxxxxxx.xxx>, <samudra.haque@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W16C4BD659F9045D7A1FA4D6B80@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Drew. I had forgotten about West Ford...but they are all gone. While in
grad school we tried some reflection test using the then prototype of the
SPS 48E and there was nothing...
Robert WB5MZO
> Date: Wed, 28 Oct 2009 16:12:54 -0400
> From: glasbrenner@xxxxxxxxxx.xxx
> To: samudra.haque@xxxxx.xxx
> CC: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: using a microsat as a potential high altitude VHF
reflector
>
>
> >
> > were there any ham radio projects (either through amsat-na or abroad)
> > that implemented a passive reflector on an orbital vehicle like
> > Project Echo
> >
> >
> Not long ago I saw some webpages and emails about some hams using ISS
> (or was it Mir?) as a passive reflector.
>
> Coincidently, I was reading about the West Ford project, which was
> launches of millions of small wire dipoles to be used as reflectors.
> Some of those clusters are still in orbit. I wonder if they are still in
> a dense enough field to reflect the 8 Ghz? signal they were designed for.
>
> 73, Drew KO4MA
>
> _______________________________________________
> 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
_________________________________________________________________
Windows 7: Simplify your PC. Learn more.
http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WLMTA
GL:ON:WL:en-US:WWL_WIN_evergreen1:102009
------------------------------
Message: 7
Date: Wed, 28 Oct 2009 18:31:09 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHF reflector
Cc: Amsat BB <amsat-bb@xxxxx.xxx>, samudra.haque@xxxxx.xxx
Message-ID: <4AE8C62D.3090304@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Space-Track is still tracking several clusters of Westford needles,
although they are certainly spread out and thinning fast. Some are still
nearly in their original orbits. As evidence:
WESTFORD NEEDLES
1 00602U 63014E 09300.68434638 +.00000003 +00000-0 +10000-3 0 07665
2 00602 087.3316 050.1496 0032690 004.4295 355.6847 08.67203352471339
73, Drew KO4MA
------------------------------
Message: 8
Date: Wed, 28 Oct 2009 22:32:54 +0000 (UTC)
From: w6zkh@xxxxxxx.xxx
Subject: [amsat-bb] W6FOG Schedule
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<1698197472.2751351256769174312.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Talk to Neal, W6FOG on the 2225z pass of AO-27, and he advised me he will be
leaving San Francisco Bay on Friday, Oct 30th, hoping for 4 good days for a
sail to La Paz, Mexico. So, starting that date, be on the lookout for him
out in the water.
John W6ZKH
------------------------------
Message: 9
Date: Wed, 28 Oct 2009 19:26:53 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: FS item (Arrow)
To: amsat-bb@xxxxx.xxx
Message-ID: <4ae8d339.0706c00a.4302.4047@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
The PCR-1000 and the UT-10 L-band module have been sold.
The Arrow antenna is still available! Keep in mind the current new/retail
price for this antenna is $139 (plus shipping). That makes this one "better
than new" ;-)
1) Arrow II Antenna 146/437-10WBP Satellite version with built-in
diplexer and split boom. Condition: nearly new, only assembled about
5 times. Elements/boom neatly numbered via label-maker tape. $100 +
shipping/insurance.
73,
Mark N8MH
>>Date: Mon, 26 Oct 2009 15:51:50 -0400
>>Delivered-To: marklhammond@xxxxx.xxx
>>Subject: FS items (Arrow, PCR-1000, 1.2 GHz module for TS-790).
>>From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
>>To: amsat-bb@xxxxx.xxx
>>
>>Hello AMSAT-BB,
>>
>>I need to pursue a tower/rotor/antenna project. Therefore, I am
>>selling some items in the shack to help fund the project. The prices
>>are "fair" and therefore "firm". I'm giving the BB a shot before I
>>take these to a local hamfest or eBay. Prices do not include
>>shipping/insurance.
>>
>>
>>
>>SOLD 2) Icom PCR-1000 receiver. Includes receiver, serial cable, and
>>power supply. Condition: few minor scuffs/scratches, perfect working
>>condition. (The variable bandwidth permits reception of 38k4 packet
>>signals!) $250 + shipping/insurance.
>>
>>SOLD 3) UT-10 1.2 GHz L-band module for Kenwood TS-790. This is a
>>plug-n-play module, about a 5-10 min. no-tuning install. Includes
>>screws. Condition: Perfect working order, low transmit time, full
>>10W output. Price: $475 + shipping/insurance.
>>
>>Please contact me directly offlist at: marklhammond AT gmail DOT com
>>
Mark L. Hammond [N8MH]
------------------------------
Message: 10
Date: Wed, 28 Oct 2009 16:27:46 -0700
From: "Jeff Yanko" <wb3jfs@xxx.xxx>
Subject: [amsat-bb] Survey: Top 250 grids
To: <amsat-bb@xxxxx.xxx>
Message-ID: <ECAE1A215A244D8AA521054F11837674@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi all!
After recently working a number of rare grids activated by our fellow
satellite ops, (again THANK YOU!!) I've been looking over the grid map and
wondered what grids are most needed. I, like most, have grids that others
may dream of working and confirming and vice versa. Then, there are those
grids that are so common, most everybody has worked and confirmed them.
Since there are no HEO's and only the FM birds with a couple of linear
birds, this survey will be focused on the North American area.
I am undertaking a task to get a better reading on what grids are
"outstanding" in need of activation. I am looking at obtaining the top 25
grids from the predominately 10 grid fields covering the U.S., Canada and
Mexico, for the total of 250 grids. Yes, most of these grids will be in the
U.S., however, I'm sure there will be some mention of VE and XE grids as
well. What I would like everybody to do is take some time and look at your
grid map and write down 25 grids from each of the grid fields that cover the
U.S., Canada and Mexico. Those grid fields are: CN, DN, EN, FN, CM, DM, EM,
FM, DL, EL. If you don't need at least 25 grids from a particular grid
field, no problem, just enter those you still need. Example. Let's say you
only need three grids from DM, they are DM74, 75, 76. Just enter those
three.
To make things simple and easy I will give an example of how the data can be
entered and e-mailed to me. Here is an example.
CN 79, 82, 93, 95, 99
DN 02, 03, 07, 13, 15, 17, 19, 22, 24, 25, 34, 37, 38
As you can see, it's relatively easy, and very easy if you've kept up on
your grid map. :)
A couple of notices.
1. Please, do not send any "water grids" since any operation from them is
sporadic and most cases, impracticle to activate for most of us.
2. Please send your data to me via e-mail, attaching it to this e-mail will
be fine. The cutoff date is November 14, 2009. This will give all plenty
of time to look over their maps and data.
Questions, comments or just sending the data, please send an e-mail.
Looking forward to receiving your replies!
73,
Jeff WB3JFS
Las Vegas, NV
DM26
------------------------------
Message: 11
Date: Wed, 28 Oct 2009 19:51:40 -0400
From: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Centerfire Yagi antennas
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <4AE8D90C.3040902@xxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Anyone had any experience with these?
http://www.centerfireantenna.com/vhf2myagi.html
They look to be a good buy and I was thinking of maybe getting one for
LEO use.
73,
Michael, W4HIJ
------------------------------
Message: 12
Date: Thu, 29 Oct 2009 00:53:57 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHFreflector
To: "Samudra Haque" <samudra.haque@xxxxx.xxx>, "Amsat-bb"
<amsat-bb@xxxxx.xxx>
Message-ID: <013901ca5829$ea43dd60$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="Windows-1252"
----- Original Message -----
From: "Samudra Haque" <samudra.haque@xxxxx.xxx>
To: "Amsat-bb" <amsat-bb@xxxxx.xxx>
Sent: Wednesday, October 28, 2009 8:46 PM
Subject: [amsat-bb] using a microsat as a potential high altitude
VHFreflector
Hi all,
I read with interest an article on the web "ECHO - America's First
Communications Satellite" By John R. Pierce which is available here:
http://www.smecc.org/john_pierce___echoredo.htm
I know ham radio operators love using their hand helds to communicate
using active transponders or active repeaters in space... no issue
with that.
were there any ham radio projects (either through amsat-na or abroad)
that implemented a passive reflector on an orbital vehicle like
Project Echo
I quote from
http://www.satmagazine.com/cgi-bin/display_article.cgi?number=490218137
The Echo-1 Balloon Satellite as it sits, fully inflated, at a Navy
hangar in Weeksville, North Carolina. The spacecraft measured 100 feet
across when deployed, and was nicknamed a ?satelloon? by those
involved in the project. The mylar film balloon acted as a passive
communications reflector for transcontinental and intercontinental
telephone (voice), radio and television signals. Echo 1 re-entered the
atmosphere May 24, 1968.
What strikes me is the implications of a large large very large
antenna (reflector), if only it could be reflective on one side of the
sphere only .... (any ideas?)
The Echo 2 was a 135-foot rigidized inflatable balloon satellite. The
satellite is shown undergoing tensile stress test in a dirigible
hanger at Weekesville. The satellite, 50 times more rigidized than
Echo I. When folded, the satellite is packed into the 41-inch diameter
canister shown in the foreground.
Did early amsat folks consider duplicating / adding to any of these
projects or launch their own 'satelloon' that did not carry an active
RF payload ? Could we outfit one of our future microsats to provide a
reflector to aid in Earth-LEO DXing like meteor-scatter ?
73 de Samudra, N3RDX
Hi Samudra, N3RDX
Early 13 august 1960 about 50 years ago I have received the ECHO 1A
45 mW beacons transmitting at 108.00 and 108.03 MHz and also I got an
excellent visual of the big satellite balloon only looking at it in the sky
with naked eye
Receiving radio signals and looking at the orbiting satellite at the same
time it was a very exciting experience and I newer forget !
I was using a home brewed downconverter for 108 MHz with two low noise
triodes 6AN4 in a front end grounded grid circuit.
The second IF receiver tuned at 27.963 MHz was an Hallicrafters SX-28
and the antenna was a qubical quad.
By the way the NASA and GSFC ground stations where transmitting to the
reflecting surface of the above passive satellite a very very high EIRP at
960 MHz and 2390 MHz using big dishes.
The experience gained with the passive ECHO satellites demonstrates that
they are not convenient at all so that the project was soon abandoned.
73" de
i8CVS Domenico
------------------------------
Message: 13
Date: Wed, 28 Oct 2009 17:22:16 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Centerfire Yagi antennas
To: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <116683.47974.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
They only "bad" review at eHam panned them for being a bit lightweight in
construction.
http://www.eham.net/reviews/detail/8191
Jim KQ6EA
--- On Wed, 10/28/09, Michael Tondee <mat_62@xxxxxxxxxxxx.xxx> wrote:
> From: Michael Tondee <mat_62@xxxxxxxxxxxx.xxx>
> Subject: [amsat-bb] Centerfire Yagi antennas
> To: "Amsat BB" <amsat-bb@xxxxx.xxx>
> Date: Wednesday, October 28, 2009, 4:51 PM
> Anyone had any experience with
> these?
> http://www.centerfireantenna.com/vhf2myagi.html
> They look to be a good buy and I was thinking of maybe
> getting one for
> LEO use.
> 73,
> Michael, W4HIJ
>
> _______________________________________________
> 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: 14
Date: Wed, 28 Oct 2009 20:22:20 -0400
From: Samudra Haque <samudra.haque@xxxxx.xxx>
Subject: [amsat-bb] Re: using a microsat as a potential high altitude
VHFreflector
To: i8cvs <domenico.i8cvs@xxx.xx>
Cc: Amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<d8c724880910281722kfc29116yebf72a20f238a4c@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Domenico, I had no idea absolutely that you would have responded with
such relevant experience !!! It is an amazing story to hear. The
recent interest and work on "inflatable" antennas may be the most
interesting chapter yet (ref: JPL DESCANSO publications) in antenna
theory.
Thanks
-samudra
>
> Hi Samudra, N3RDX
>
> Early 13 august 1960 about 50 years ago I have received the ECHO 1A
> 45 mW beacons transmitting at 108.00 and 108.03 MHz and also I got an
> excellent visual of the big satellite balloon only looking at it in the sky
> with naked eye
>
> Receiving radio signals and looking at the orbiting satellite at the same
> time it was a very exciting experience and I newer forget !
>
> I was using a home brewed downconverter for 108 MHz with two low noise
> triodes 6AN4 in a front end grounded grid circuit.
>
> The second IF receiver tuned at 27.963 MHz was an Hallicrafters SX-28
> and the antenna was a qubical quad.
>
> By the way the NASA and GSFC ground stations where transmitting to the
> reflecting surface of the above passive satellite a ?very very high EIRP at
> 960 MHz and 2390 MHz using big dishes.
>
> The experience gained with the passive ECHO satellites demonstrates that
> they are not convenient at all so that the project was soon abandoned.
>
> 73" de
>
> i8CVS Domenico
------------------------------
Message: 15
Date: Thu, 29 Oct 2009 01:42:54 +0000
From: Nigel Gunn <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Hopefully - Some ITAR Clarifications.
To: Samudra Haque <samudra.haque@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4AE8F31E.5000303@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Agreed, but you have to remember to GO THERE.
E-mail comes to me and my e-mail client rejects most of the spam and
sorts the good stuff into folders.
Much easier
Samudra Haque wrote:
> With a forum, you can unclutter your mailbox, and also the forum
> system can always tag messages according to a timeline/subject/thread
> whatsoever, so if you are really busy (are we not all busy ... its a
> hobby of course) then just wait to log on, and then when you do, the
> system can show you (if desired) all of the unread messages in the
> various topics you are subscribed to (Think: USENET Newsgroup style
> focus) unless you wish to say "catchup" and then all is marked as
> read.
>
> In your current system of receiving messages from the "amsat-bb"
> mailing list, unless you have a very large mailbox and never delete
> your message pool, you are (we are..) all keeping separate message
> copies for each and every reply, instead of just the delta's for each
> message kept on a server somewhere. This method is not only bandwidth
> inefficient, it also means YOU the user are responsible for tracking
> your threads and keeping up to date. Would you not wish to lessen your
> burden just a little bit by having the system keep track of where you
> are in your hobby ?
>
> If you like, the forum can also mail all relevant postings to you as
> regular SMTP mail, so if you don't like the forum, that's ok too.
>
> -samudra N3RDX
>
> On Mon, Oct 26, 2009 at 6:06 PM, Tony Langdon <vk3jed@xxxxx.xxx> wrote:
>
>> At 08:37 AM 10/27/2009, Samudra Haque wrote:
>>
>>
>>> Yes, I usually take care to divide my correspondence amongst the
>>> particular groups I am working with, and this is also the basis in
>>> which I recently proposed moving to (a) moderated forum (such as
>>> phpBB) or (b) sub-dividing the amsat-bb list into amsat-engineering
>>>
>> If AMSAT goes to a forum, I'm out of here, I can't cope with the volume of
>> messages on a forum, much easier in email. Email lists can be moderated
>> too, but the separation might be a good way to simplify ITAR compliance.
>>
>> 73 de VK3JED / VK3IRL
>> http://vkradio.com
>>
>>
>>
>
> _______________________________________________
> 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
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
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08:10:00
>
>
------------------------------
Message: 16
Date: Wed, 28 Oct 2009 22:31:11 -0400
From: "Randy" <RSwart1@xxxxx.xx.xxx>
Subject: [amsat-bb] FT-897D - WFM
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000001ca583f$e18c9070$0301a8c0@xxxx>
Content-Type: text/plain; charset="us-ascii"
If I have asked this question previously, I apologize.
( getting old sucks sometimes hi hi )
I would like to know if any of the radio guru's out there
Know of a way to persuade my 897D to receive in WFM on 137 Mhz?
The only place it does that now is on the FM Broadcast band ..
I would R E A L L Y like to do this ..
I emailed yaesu with the question ..
( I bet we all know the result of that )
Thanks in advance ..
And a special thanks to Mike and Tim for helping me so much on
The satellite stuff .. Been working CW and SSB on VO-52 simplex ..and
Its going great .. Was quite the lil learning curve though. Now I just
Need some a better antenna system, preamp and duplexer.
Randy - N2CUA
------------------------------
Message: 17
Date: Wed, 28 Oct 2009 20:03:03 -0500
From: Kent Frazier <k5knt.kent@xxxxx.xxx>
Subject: [amsat-bb] Stealth Satellite Station?
To: "AMSAT-BB@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<92f8f1580910281803j54c43d06v2bd6e791e0df05b6@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I currently live in a rental house and an outside antenna is out of the
question. I asked about putting up a satellite TV dish at my own expense
last year and received and flat out "NO". So, my current options are as
follows:
1. Going out to my car and working the FM birds with my Icom 2720H and 19"
whip.
2. Working the FM birds from the back/front yard or possibly inside the
house with my Icom W32A and Elk LP antenna.
3. Setting up my 2720 in the house with some sort of stealth antenna and
give a try at satellite APRS.
Obviously options 1 and 3 still allow for option 2.
Has anyone tried any form of stealth antenna for Satellites. I am really
interested in the idea of combining the satellites and aprs together.
--
Kent R Frazier, K5KNT
AMSAT #36765, ARRL, San Angelo Amateur Radio Club, Tom Green County - ARES
Sent from San Angelo, TX, United States
------------------------------
_______________________________________________
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 4, Issue 577
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