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CX2SA > SATDIG 24.08.12 20:03l 474 Lines 15601 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V7 269
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Sent: 120824/1902Z @:CX2SA.SAL.URY.SA #:555 [Salto] FBB7.00e $:AMSATBB7269
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Pictures Of Sfera Deployment (B J)
2. Possible Operation From CO96 (B J)
3. SpaceX Cleared For Cargo Flights To ISS (B J)
4. Ts2000 with external preamps (Lawn, Richard)
5. Re: Ts2000 with external preamps (Bob DeVarney W1ICW)
6. Re: Ts2000 with external preamps (Stefan Wagener)
7. SPROUT SSTV Nanosat Jan 2013 (Trevor .)
8. Re: Ts2000 with external preamps (Bob DeVarney W1ICW)
9. Re: Ts2000 with external preamps (Lawn, Richard)
10. Re: Ts2000 with external preamps (Bob DeVarney W1ICW)
11. Exclusive New Product Launch at AMSAT-UK Colloquium (Trevor .)
12. NASA tiny sats (Robert McGwier)
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Message: 1
Date: Thu, 23 Aug 2012 22:17:24 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Pictures Of Sfera Deployment
Message-ID:
<CAP7QzkMDhxf36wyByXGYyoHOaJMDKipTmHsE3cN0Z7-sjHtCxw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://www.onorbit.com/node/4890
73s
Bernhard VA6BMJ @ DO33FL
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Message: 2
Date: Fri, 24 Aug 2012 02:20:09 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Possible Operation From CO96
Message-ID:
<CAP7QzkMx4zuANSXHk=Bbj_=V40DA3XnVzqri7NtvSOomihyy9g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'll be travelling to CO96 in NE British Columbia in about 2 weeks
time and I plan on taking my FT-817 and Arrow Yagi with me. If I can,
I'll try to get onto AO-27 and SO-50.
I don't have any details right now about exactly when I'll arrive or
how long I'll be there. I might know more in the next 2 or 3 days.
73s
Bernhard VA6BMJ @ DO33FL
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Message: 3
Date: Fri, 24 Aug 2012 03:26:30 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SpaceX Cleared For Cargo Flights To ISS
Message-ID:
<CAP7QzkNy1anspF0rjJDgWM603DWbHA9fCzv4PuCBJTQ_oD79RA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://spacecoalition.com/blog/international-space-station-space-shuttle-nasa/
nasa-clears-spacex-for-commercial-space-station-cargo-missions
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 4
Date: Fri, 24 Aug 2012 11:54:30 -0400
From: "Lawn, Richard" <RLawn@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Ts2000 with external preamps
Message-ID: <AAD35F28-3D1B-4566-BA7E-B9F83B9BB171@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Can anyone recommend to me how they remove dc from the coax before rf hits
my preamps and fry's them.? I see a box on eBay that a guy is selling but it
seems to be a device that uses relays and is designed to key external rf
amps using the din connector on the ts2000. I'm not certain however this
will work for my needs.
Rick
W2jaz
Sent from my iPad
http://RickLawn.com
------------------------------
Message: 5
Date: Fri, 24 Aug 2012 12:09:59 -0400
From: Bob DeVarney W1ICW <we1u@xxxxxxxxxxx.xxx>
To: "Lawn, Richard" <RLawn@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Ts2000 with external preamps
Message-ID: <5037A757.3010203@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I guess I need to better understand what preamps you have.. having DC on
the coax might in fact key them up instead of harming them.
If memory serves me, the SSB preamps have the option of being fed up the
coax or via separate line. I chose the latter choice, only because at
the time, the rigs I owned did not have the option to feed dc up the coax.
What is the link for the box on eBay?
My TS-2000 has the option to key external amps, but that's only a
contact closure, one per VHF band, via the DIN connector.
73 de W1ICW
On 8/24/2012 11:54 AM, Lawn, Richard wrote:
> Can anyone recommend to me how they remove dc from the coax before rf hits
my preamps and fry's them.? I see a box on eBay that a guy is selling but it
seems to be a device that uses relays and is designed to key external rf
amps using the din connector on the ts2000. I'm not certain however this
will work for my needs.
> Rick
> W2jaz
>
>
> Sent from my iPad
> http://RickLawn.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
>
------------------------------
Message: 6
Date: Fri, 24 Aug 2012 11:22:01 -0500
From: Stefan Wagener <wageners@xxxxx.xxx>
To: "Lawn, Richard" <RLawn@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Ts2000 with external preamps
Message-ID:
<CAKu8kHA76tr1kbsexRv+xD9Lwb2xOcXzt6-0fObi=oz9vHJR2A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
In the past I always used the DCW-15B sequencers. Just Google them.
Stefan
On Fri, Aug 24, 2012 at 10:54 AM, Lawn, Richard <RLawn@xxxxx.xxx> wrote:
> Can anyone recommend to me how they remove dc from the coax before rf hits
> my preamps and fry's them.? I see a box on eBay that a guy is selling but
> it seems to be a device that uses relays and is designed to key external rf
> amps using the din connector on the ts2000. I'm not certain however this
> will work for my needs.
> Rick
> W2jaz
>
>
> Sent from my iPad
> http://RickLawn.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
>
------------------------------
Message: 7
Date: Fri, 24 Aug 2012 17:40:24 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] SPROUT SSTV Nanosat Jan 2013
Message-ID:
<1345826424.93579.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
SPROUT, a 20 x 20 x 22 cm amateur radio SSTV nano-satellite with a mass of
6.7 kg, plans to launch with the L-band (1236.5 MHz/1257.5 MHz/1278.5 MHz)
Synthetic Aperture Radar (SAR) satellite ALOS-2 in January, 2013.
See http://www.uk.amsat.org/?p=9837
73 Trevor M5AKA
AMSAT-UK International Space Colloquium takes place Guildford Sept. 15-16
http://www.uk.amsat.org/colloquium/twelve
----
------------------------------
Message: 8
Date: Fri, 24 Aug 2012 12:43:37 -0400
From: Bob DeVarney W1ICW <we1u@xxxxxxxxxxx.xxx>
To: "Lawn, Richard" <RLawn@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Ts2000 with external preamps
Message-ID: <5037AF39.4030901@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I suspect the issue with the Icom preamps and a TS-2000 is that the Icom
preamp does not appear to RF-sense.. if there's DC on the coax, it's in
line, if there's not DC on the coax, it's bypassed. I run the SSB
SP-2000 and it can handle 200 watts RF-sensed. No sequencer necessary
with the rig barefoot.
The box you referenced on eBay protects the TS-2000 from amplifiers that
need a lot of current from the radio to switch them, or have high
voltage levels in the switching circuit ( bad design )
I did find this link which had a lot of useful info:
http://forums.qrz.com/showthread.php?287072-ICOM-AG-25-amp-TS-2000-Questions
On 8/24/2012 12:15 PM, Lawn, Richard wrote:
> I have an icom preamp and wish I didn't. I'll send you the eBay link
separately.
> Rick
>
>
>
------------------------------
Message: 9
Date: Fri, 24 Aug 2012 13:28:37 -0400
From: "Lawn, Richard" <RLawn@xxxxx.xxx>
To: "we1u@xxxxxxxxxxx.xxxx <we1u@xxxxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Ts2000 with external preamps
Message-ID: <AEF1155D-0059-42BD-82B0-063B67E28CD1@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
This link is very useful and one I didn't find when I searched. It seems
that with the particular preamp and xcvr I have a sequencer is needed to
ensure dx is removed from the coax before rf is introduced. I think the
easiest solution is to get a different preamp once I get my icom repaired. I
could also swap it with the mirage I'm using at home with the 847 which I
think is immune to rf or is switched. Unless you have an icom xcvr their
preamps are a bad purchase.
Thanks everyone.
Rick
W2jaz
Sent from my iPad
http://RickLawn.com
On Aug 24, 2012, at 12:43 PM, "Bob DeVarney W1ICW" <we1u@xxxxxxxxxxx.xxx>
wrote:
> I suspect the issue with the Icom preamps and a TS-2000 is that the Icom
> preamp does not appear to RF-sense.. if there's DC on the coax, it's in
> line, if there's not DC on the coax, it's bypassed. I run the SSB
> SP-2000 and it can handle 200 watts RF-sensed. No sequencer necessary
> with the rig barefoot.
>
> The box you referenced on eBay protects the TS-2000 from amplifiers that
> need a lot of current from the radio to switch them, or have high
> voltage levels in the switching circuit ( bad design )
>
> I did find this link which had a lot of useful info:
>
> http://forums.qrz.com/showthread.php?287072-ICOM-AG-25-amp-TS-2000-Questions
>
> On 8/24/2012 12:15 PM, Lawn, Richard wrote:
>> I have an icom preamp and wish I didn't. I'll send you the eBay link
separately.
>> Rick
>>
>>
>>
>
------------------------------
Message: 10
Date: Fri, 24 Aug 2012 14:05:54 -0400
From: Bob DeVarney W1ICW <we1u@xxxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Ts2000 with external preamps
Message-ID: <5037C282.2040104@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I've had phenomenal success with the SSB preamps over the last 25 years.
I have one for both 2 meters and 70 cm and if I had anything worth
mentioning on 6 meters for an antenna I would have one there as well.
Prior to that I used Landwehr.
For my EME station I am using a DB6NT receive-only, only because at the
time the Deutschemark ( or Euro ) was cheap and I could get the DB6NT
cheaper shipped from Germany than I could get an equivalent SSB receive
only here. I have no regrets, the DB6NT is a thing of beauty as only
German workmanship can make.
I see that ARR is now making an rf-switched preamp that handles some
power now too, but I'd stick with the SSB if I were you, only because
they will handle up to 700 watts if you sequence them; 200 RF-sensed.
On 8/24/2012 1:28 PM, Lawn, Richard wrote:
> This link is very useful and one I didn't find when I searched. It seems
that with the particular preamp and xcvr I have a sequencer is needed to
ensure dx is removed from the coax before rf is introduced. I think the
easiest solution is to get a different preamp once I get my icom repaired. I
could also swap it with the mirage I'm using at home with the 847 which I
think is immune to rf or is switched. Unless you have an icom xcvr their
preamps are a bad purchase.
> Thanks everyone.
> Rick
> W2jaz
>
------------------------------
Message: 11
Date: Fri, 24 Aug 2012 19:09:24 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Exclusive New Product Launch at AMSAT-UK
Colloquium
Message-ID:
<1345831764.29923.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
AMSAT-UK are delighted to announce that Howard Long, G6LVB, will be present
at the Colloquium this year and will be launching a new "FUNcube Dongle
PRO-PLUS" during his presentation.
Full technical details have been embargoed until his talk and we are not
permitted to steal his thunder by releasing further details of this new
product in advance. Attendees at the Colloquium will therefore be the first
to learn about Howard's latest development which will further advance the
applications for SDR devices.
The Colloquium is a truly international event and will include:
Exclusive access to inspect the new SSTL clean room and integration
facilities at the recently opened Kepler Building. If you have visited their
previous facilities at the university campus, during previous Colloquia, you
will be amazed by what is happening now.
Presentations by experts from AMSAT-SA, AMSAT-NA and AMSAT-DL on their
current spacecraft projects.
CubeSat presentations on UKube-1, STRaND-1, STRaND-2 and, of course the
FUNcube-1 project.
We will be including an exclusive roundup of a number of new live and
potential spacecraft projects that are under investigation and/or development.
Additionally a number of presentations are planned covering new
communications techniques and similar futuristic topics.
Plus all the usual networking opportunities, the gala dinner and
auction/raffle, plus the opportunity to operate the sophisticated
groundstation in the GB4FUN mobile demonstration module.
The Colloquium takes place at the Holiday Inn, Guildford, GU2 7XZ, England,
September 15-16. Rooms and Saturday?s Gala Dinner must be booked in advance
at http://tinyurl.com/Colloquium-2012-Booking
Further information http://www.uk.amsat.org/colloquium/twelve
73 Trevor M5AKA
AMSAT-UK
----
------------------------------
Message: 12
Date: Fri, 24 Aug 2012 14:20:19 -0400
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] NASA tiny sats
Message-ID:
<CA+K5gzdywQBZjngseiHb57TayvVNXeTY9jciDOeup1=8aH6PGw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
NASA Preparing Mini-Satellites To Send Into Space Powered By The Nexus
One and Nexus S
posted on Aug 24th 2012 at 4:54am by Chris Chavez
The boys at NASA have been making headlines after hitting the sand
dunes of Mars with their mini go-cart, Curiousity, and it looks like
they have a few more surprises in store. A team from NASA?s Ames
Research Center has been hard at work developing miniature satellites
? called a ?PhoneSat? ? powered by, none other, than the OG Nexus One
and Nexus S. NASA has spent the last few years putting these PhoneSats
and the devices inside through the paces, testing them in a variety of
situations, destroying a few prototypes in the process.
Currently, the team has 2 nanosatellite prototypes that will be sent
up into space at different times. To see if something like this is
even possible, the first will consist of a Nexus One, external
batteries, external radio beacon, all inside a comfy 10x10x10cm shell.
If the PhoneSat 1.0 is a success, the team will send up the PhoneSat
2.0 with the more powerful Nexus S inside and featuring a 2-way S-band
radio, solar panels, and GPS receiver.
At $3,500 to build, NASA?s goal is to launch the ?lowest-cost
satellites ever flown into space,? and plans to send ?em on up later
this year aboard the Orbital Sciences Corporation?s Antares rocket.
With plans to send future PhoneSats to the moon, it shouldn?t be long
before we see the Galaxy Nexus making an orbital space trip for
itself, finally at home amongst the galaxies.
http://phandroid.com/2012/08/24/nasa-preparing-mini-satellites-to-send-into-sp
ace-powered-by-the-nexus-one-and-nexus-s/
--
Bob McGwier
Technical Director, Allied Communication, LLC
Facebook: N4HYBob
ARS: N4HY
------------------------------
_______________________________________________
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 7, Issue 269
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