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CX2SA > SATDIG 04.12.08 14:05l 848 Lines 26702 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: ISS (Eric Fort)
2. Re: EZ-lindenblad info (Pughkeithd@xx.xxxx
3. Re: ISS (David - KG4ZLB/M?ZLB)
4. Re: EZ-lindenblad info (Tim Tuck)
5. AO-16 update 3 December 2008 (Mark L. Hammond)
6. Re: AO-16 update 3 December 2008 (n3tl@xxxxxxxxx.xxxx
7. Re: EZ-lindenblad info (Nigel Gunn G8IFF/W8IFF)
8. Re: EZ-lindenblad info (Anthony Monteiro)
9. Re: AO-16 update 3 December 2008 (Sebastian)
10. AMSAT power point presentation wanted (Mike McConnell)
11. Re: EZ-lindenblad info (James Duffey)
12. Re: EZ-lindenblad info (Anthony Monteiro)
13. Re: AMSAT power point presentation wanted (David Johnson)
14. newbie (Tim Goodrich)
15. 1984 Orbit Magazine now online (Phil Karn Jr)
----------------------------------------------------------------------
Message: 1
Date: Wed, 3 Dec 2008 12:01:07 -0800
From: "Eric Fort" <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] Re: ISS
To: "AMSAT-BB bb" <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430812031201w6d4b1b82t4390a337de131bf6@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
So what is the answer to the question:
> ...does anyone know whether the ARISS equipment
> runs only on battery power or does it have the option to feed directly
> from the station's power?
It seems to have not gone to the list.
-e
On Wed, Dec 3, 2008 at 11:49 AM, David - KG4ZLB/M?ZLB
<m0zlb@xxxxxxxxxx.xxx>wrote:
> Many thanks to Patrick (WD9EWK) and David (G8OQW) for the answer to that!
>
> David
> KG4ZLB/M0ZLB
> www.kg4zlb.com
>
>
> >
> > As a matter of interest, does anyone know whether the ARISS equipment
> > runs only on battery power or does it have the option to feed directly
> > from the station's power?
> >
> > (I know the ISS itself runs on solar generated battery power, but is the
> > radio equipment powered only by the little Energiser bunny or can it
> > have some solar juice?)
> >
> > Thanks
> >
> >
> >
> >
> >
> >
> >
> _______________________________________________
> 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: 2
Date: Wed, 3 Dec 2008 15:13:09 EST
From: Pughkeithd@xx.xxx
Subject: [amsat-bb] Re: EZ-lindenblad info
To: mryan301@xxxxxxx.xxxx amsat-bb@xxxxx.xxx
Cc: w5iu@xxxxxx.xxx
Message-ID: <d0f.41b24429.36684255@xx.xxx>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 12/3/2008 12:51:07 PM Central Standard Time,
mryan301@xxxxxxx.xxx writes:
> Subj: Re: [amsat-bb] Re: EZ-lindenblad info
> Date:12/3/2008 12:51:07 PM Central Standard Time
> From:mryan301@xxxxxxx.xxx
> To:Pughkeithd@xx.xxx
> Received from Internet:
>
>
>
> Thanks for the response. Are the Proceedings on line? A quick scan of the
> AMSAT site didnt come up with anything obvious.
>
>
> >> -------------- Original message --------------
>> From: Pughkeithd@xx.xxx
>> In a message dated 12/3/2008 9:13:40 AM Central Standard Time,
>> mryan301@xxxxxxx.xxx writes:
>> >>> Subj: [amsat-bb] Re: EZ-lindenblad info
>>> Date:12/3/2008 9:13:40 AM Central Standard Time
>>> From:mryan301@xxxxxxx.xxx
>>> To:amsat-bb@xxxxx.xxx
>>> Received from Internet:
>>>
>>>
>>>
>>> I have the article and it seems that it only provides details and specs on
>>> a 2M version. Did I miss something or is there anotehr place to get specs
>>> for 70 cM?
>>>
>>> WB1AAT
>>>
>>> --- On Tue, 12/2/08, Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx> wrote:
>>>
>>> >From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
>>> >Subject: [amsat-bb] Re: EZ-lindenblad info
>>> >To: "amsat" <amsat-bb@xxxxx.xxx>
>>> >Date: Tuesday, December 2, 2008, 5:55 PM
>>> >Is the article available on line? I don't keep paper
>>> >publications.
>>> >
>>> >john heath wrote:
>>> >>Hi< BR>>>
>>> >>I built the AA2TX 70 cms Easi Lindenblad exactly to
>>> >the dimensions in
>>> >>Tony's article.
>>> >
>>> >--
>>>
><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>>>
>>> >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
>>>
>> The latest 70 cm version of this antenna can be found in the Proceedings of
>> the 2007 AMSAT-North America Space Symposium and Annusl Meeting. The
>> original 70 cm version was in the 2006 Proceedings. I believe the new
version
>> has also been published in the AMSAT Journal, but I can't remember the
issue.
>>
>> 73 - Keith, W5IU
>>
>
The AMSAT Proceedings are not on line; however, they are available on a DVD
from AMSAT. This 2007 DVD includes a wealth of other information as well.
73 - Keith, W5IU
------------------------------
Message: 3
Date: Wed, 03 Dec 2008 15:07:05 -0500
From: David - KG4ZLB/M?ZLB <m0zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ISS
To: eric.fort@xxxxx.xxx
Cc: AMSAT-BB bb <amsat-bb@xxxxx.xxx>
Message-ID: <4936E6E9.20708@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Oops sorry - this is what I received from Patrick (WD9EWK), viz.,
"The ISS gear runs on the station's power, except for the VC-H1 SSTV
camera thingie. For now, the VC-H1 runs on AA batteries. The
attached PDF explains the setup, including the power supply for the
ham gear."
David
KG4ZLB/M0ZLB
www.kg4zlb.com
Eric Fort wrote:
> So what is the answer to the question:
>
> > ...does anyone know whether the ARISS equipment
> > runs only on battery power or does it have the option to feed directly
> > from the station's power?
>
> It seems to have not gone to the list.
>
> -e
>
> On Wed, Dec 3, 2008 at 11:49 AM, David - KG4ZLB/M?ZLB
> <m0zlb@xxxxxxxxxx.xxx <mailto:m0zlb@xxxxxxxxxx.xxx>> wrote:
>
------------------------------
Message: 4
Date: Thu, 04 Dec 2008 07:20:04 +1100
From: "Tim Tuck" <timt@xxxxxxx.xxx>
Subject: [amsat-bb] Re: EZ-lindenblad info
To: nigel@xxxxx.xxx
Cc: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <4936E9F4.7040200@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Nigel Gunn G8IFF/W8IFF wrote:
> What's the difference between a metric version and any other version.
> Just multiply the inches by 25.4 and it will be metric.
>
While it would be nice if it was that easy the problem arises when
trying to buy aluminium in those odd sizes. i.e. 1/4inch is 6.45mm.
Local aluminium suppliers don't have imperial sizes so I'm stuck with
5mm, 10mm, 15mm etc. thus the math needs redoing for the different sizes
and I was wondering if anyone had done that before I attempt it. :)
regards
Tim
--
VK2XTT :: QF56if :: BMARC :: WIA :: AMSAT-VK :: AMSAT
------------------------------
Message: 5
Date: Wed, 3 Dec 2008 15:31:00 -0500 (EST)
From: "Mark L. Hammond" <n8mh@xxxxxxxxxx.xxx>
Subject: [amsat-bb] AO-16 update 3 December 2008
To: amsat-bb <amsat-bb@xxxxx.xxx>
Cc: pacops <pacops@xxxxx.xxx>
Message-ID:
<960422399.17801228336260981.JavaMail.root@xxxx.xxxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello All,
As expected, over the last few days AO-16 has started to again experience
"shutdowns". Thanks to your updates at the very handy webpage at
http://oscar.dcarr.org/ it seems that the first shutdown occurred between 28
Nov 2008 2030 UTC and 29 Nov 2008 0615 UTC.
So far I've restarted the bird three times, and each time it appears to stay
up for a day or more. We can expect the situation to worsen, as the eclipse
periods get longer and the satellite temperatures continue to go down. We've
been warning you :) Get those AO-16 contacts in now!
I'll try to restart AO-16 as my schedule allows. Your reports to the OSCAR
Satellite Status page by KD5QGR are very helpful; it helps me know when the
bird is down so that I can do my best to restart it. Based on the times of
the passes lately, it's difficult to be available when the bird is above the
horizon.
If the birds is operational in voice mode, you should clearly hear the "not-
so-repressed carrier" on the downlink. Special request--if you do not hear
the carrier, please do not transmit to AO-16, as your transmissions make it
difficult to command the satellite. And, if you hear the "hummmming" of the
PSK transmitting, again please do not attempt to transmit to the bird; it's
likely that I have restarted the bird and need to collect telemetry before
configuring it into voice mode.
Thanks to all you faithful AO-16 operators!
Current operational mode for AO-16 (as available!):
Mode FM Voice Repeater ( Downlink is DSB)
Uplink : 145.9200 MHz FM
Downlink 437.0260 MHz SSB
73,
--
Mark L. Hammond [N8MH]
AO-16 Command Station
------------------------------
Message: 6
Date: Wed, 03 Dec 2008 21:05:39 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: AO-16 update 3 December 2008
To: "Mark L. Hammond" <n8mh@xxxxxxxxxx.xxx>, amsat-bb
<amsat-bb@xxxxx.xxx>
Cc: pacops <pacops@xxxxx.xxx>
Message-ID:
<120320082105.8331.4936F4A30003F7E20000208B22230703629B0A02D2089B9A019C0
4040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey Mark,
This AO-16 fan appreciates your efforts (more than I can find words to
express) to keep her going as long as possible. She operates in a historic
mode - one that never really was intended - that is really fun to operate. And
she is such a wonderfully sensitive satellite. As many here know, I enjoy the
challenge of operating "old school" using a fully portable setup that requires
manual Doppler tuning and manual tracking of the satellite with my antenna(s).
I have been fortunate enough to complete and confirm a contact with AO-16 at
1.2 degrees elevation, and also have completed contacts running .05-watt rf
out with my FM HT. And I'm sure some recall the threads here about my dual-
band/dual-mode/dual-satellite contacts (4 in all) involving AO-16 and AO-51.
Just in the last week, I also made three AO-16 contacts transmitting through
my 0-gain eFactor omni antenna while receiving on the end-fed longwire I put
up a couple weeks ago to get back on the low bands! Those are great contacts
to have in the log, too.
Thanks again for all your efforts to keep AO-16 going. I'll be listening for
her every pass I can!
73 to all,
Tim - N3TL
AMSAT Member No. 36820
QRP-ARCI Member No. 5547
ARRL Member No. 7027180
Athens, Ga. - EM84ha
-------------- Original message from "Mark L. Hammond" <n8mh@xxxxxxxxxx.xxx>:
--------------
> Hello All,
> As expected, over the last few days AO-16 has started to again experience
"shutdowns". Thanks to your updates at the very handy webpage at
http://oscar.dcarr.org/ it seems that the first shutdown occurred between 28
> Nov 2008 2030 UTC and 29 Nov 2008 0615 UTC.
> So far I've restarted the bird three times, and each time it appears to stay
up for a day or more. We can expect the situation to worsen, as the eclipse
periods get longer and the satellite temperatures continue to go down. We've
> been warning you :) Get those AO-16 contacts in now!
> I'll try to restart AO-16 as my schedule allows. Your reports to the OSCAR
Satellite Status page by KD5QGR are very helpful; it helps me know when the
bird is down so that I can do my best to restart it. Based on the times of the
passes lately, it's difficult to be available when the bird is above the
> horizon.
> If the birds is operational in voice mode, you should clearly hear the
> "not-so-repressed carrier" on the downlink. Special request--if you do not
hear
> the carrier, please do not transmit to AO-16, as your transmissions make it
> difficult to command the satellite. And, if you hear the "hummmming" of the
> PSK transmitting, again please do not attempt to transmit to the bird; it's
> likely that I have restarted the bird and need to collect telemetry before
> configuring it into voice mode.
>
> Thanks to all you faithful AO-16 operators!
>
> Current operational mode for AO-16 (as available!):
>
> Mode FM Voice Repeater ( Downlink is DSB)
> Uplink : 145.9200 MHz FM
> Downlink 437.0260 MHz SSB
>
>
> 73,
> --
> Mark L. Hammond [N8MH]
> AO-16 Command Station
> _______________________________________________
> 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: Wed, 03 Dec 2008 21:26:00 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: EZ-lindenblad info
To: Tim Tuck <timt@xxxxxxx.xxx>
Cc: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <4936F968.6050103@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Diameters are not critical, lengths are. Use whatever fits.
If you increase diameters significantly you might need to shorten elements
very slightly.
Tim Tuck wrote:
> Nigel Gunn G8IFF/W8IFF wrote:
>> What's the difference between a metric version and any other version.
>> Just multiply the inches by 25.4 and it will be metric.
>>
> While it would be nice if it was that easy the problem arises when
> trying to buy aluminium in those odd sizes. i.e. 1/4inch is 6.45mm.
> Local aluminium suppliers don't have imperial sizes so I'm stuck with
> 5mm, 10mm, 15mm etc. thus the math needs redoing for the different sizes
> and I was wondering if anyone had done that before I attempt it. :)
>
> regards
>
> Tim
>
>
--
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
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
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
------------------------------
Message: 8
Date: Wed, 03 Dec 2008 16:49:35 -0500
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Subject: [amsat-bb] Re: EZ-lindenblad info
To: "Tim Tuck" <timt@xxxxxxx.xxx>, nigel@xxxxx.xxx
Cc: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <20081203214934.8C3LnY900E8AG@xxxxxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 03:20 PM 12/3/2008, Tim Tuck wrote:
>Nigel Gunn G8IFF/W8IFF wrote:
> > What's the difference between a metric version and any other version.
> > Just multiply the inches by 25.4 and it will be metric.
> >
>While it would be nice if it was that easy the problem arises when
>trying to buy aluminium in those odd sizes. i.e. 1/4inch is 6.45mm.
>Local aluminium suppliers don't have imperial sizes so I'm stuck with
>5mm, 10mm, 15mm etc. thus the math needs redoing for the different sizes
>and I was wondering if anyone had done that before I attempt it. :)
>
>regards
>
>Tim
Hi Tim,
Use 20mm aluminum tubing and no correction is needed.
Of course you will have to do something clever
with the PVC parts.
73,
Tony AA2TX
------------------------------
Message: 9
Date: Wed, 3 Dec 2008 17:30:19 -0500
From: Sebastian <w4as@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: AO-16 update 3 December 2008
To: AMSAT BB <AMSAT-BB@xxxxx.xxx>
Message-ID: <DF29BEDF-62A4-43A7-A8EB-6DB15A3D9F2C@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Mark, on the last pass of AO-16 (I would say approximately 21:30 UTC
over EL95), the bird was nice and strong, and there weren't any
signals on there, with the exception of some QRM south of the border.
The bird was traveling north from the Caribbean/Gulf of Mexico area.
I was calling CQ, but no one was coming back to me, until the
footprint was over the USA. Then Rick, WA4NVM came back to me. I
said hello and did the usual exchange. When he came back to me, all I
heard was heavy distortion. I wasn't sure if it was him. I waited
for a few seconds and didn't hear anything, so I transmitted and asked
him if he had heard me - my downlink sounded fine. Again I heard the
heavy distortion, and once again, I keyed up and said that if it was
him, that he was very distorted. Once again, my downlink was clear,
but then it started to get distorted, to the point where it was
unintelligible.
Towards the end of the pass, the distortion went away, and I called
him when I was down to about 3 degrees, and he said that yes it was
him, and he couldn't figure out what was going on, that he had lowered
and increased his power, but there was still distortion. I replied to
him and all was well until LOS.
I have a sad feeling the end is near.
73 de W4AS
Sebastian
On Dec 3, 2008, at 3:31 PM, Mark L. Hammond wrote:
> Hello All,
>
> As expected, over the last few days AO-16 has started to again
> experience "shutdowns". Thanks to your updates at the very handy
> webpage at http://oscar.dcarr.org/ it seems that the first shutdown
> occurred between 28 Nov 2008 2030 UTC and 29 Nov 2008 0615 UTC.
>
> So far I've restarted the bird three times, and each time it appears
> to stay up for a day or more. We can expect the situation to
> worsen, as the eclipse periods get longer and the satellite
> temperatures continue to go down. We've been warning you :) Get
> those AO-16 contacts in now!
>
> I'll try to restart AO-16 as my schedule allows. Your reports to
> the OSCAR Satellite Status page by KD5QGR are very helpful; it helps
> me know when the bird is down so that I can do my best to restart
> it. Based on the times of the passes lately, it's difficult to be
> available when the bird is above the horizon.
>
> If the birds is operational in voice mode, you should clearly hear
> the "not-so-repressed carrier" on the downlink. Special request--if
> you do not hear the carrier, please do not transmit to AO-16, as
> your transmissions make it difficult to command the satellite.
> And, if you hear the "hummmming" of the PSK transmitting, again
> please do not attempt to transmit to the bird; it's likely that I
> have restarted the bird and need to collect telemetry before
> configuring it into voice mode.
>
> Thanks to all you faithful AO-16 operators!
>
> Current operational mode for AO-16 (as available!):
>
> Mode FM Voice Repeater ( Downlink is DSB)
> Uplink : 145.9200 MHz FM
> Downlink 437.0260 MHz SSB
>
>
> 73,
> --
> Mark L. Hammond [N8MH]
> AO-16 Command Station
------------------------------
Message: 10
Date: Wed, 3 Dec 2008 19:04:15 -0600
From: "Mike McConnell" <w0pd@xxxxx.xxx>
Subject: [amsat-bb] AMSAT power point presentation wanted
To: <amsat-bb@xxxxx.xxx>
Message-ID: <005901c955ac$3a6c4600$af44d200$@xxx>
Content-Type: text/plain; charset="us-ascii"
I am going to do a 20-minute or so presentation on Ham Radio to my local
Kiwanis club. They saw an article in the local newspaper a couple weeks ago
after I was able to speak with Owen Garriott. They thought it would be
interesting to learn a bit about satellites.
I wonder if there is anybody out there who already has a power point
presentation concerning AMSAT & SAT operations that I could use.
Thanks
Mike McConnell, Ph.D.
W0PD
AMSAT #36792
ARRL#0001168388
------------------------------
Message: 11
Date: Wed, 3 Dec 2008 18:28:12 -0700
From: James Duffey <JamesDuffey@xxxxxxx.xxx>
Subject: [amsat-bb] Re: EZ-lindenblad info
To: "Tim Tuck" <timt@xxxxxxx.xxx>
Cc: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <501115D2-DDB1-48E9-BB30-DC1E8361FE71@xxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Tim - What you need to do is calculate the reactance of the elements
with the diameter of the specified elements. Then calculate the length
of the element with the new diameter so that the reactance of the new
element is the same as the old one. I think that the corrections may
not be significant if the diameters are not too far apart.
L. B. Cebik wrote how to do this in his web page on scaling Yagis form
one frequency to another. I wrote a spreadsheet to calculate these
lengths for Yagis, mostly to go from 432 MHz to 144 MHz. You could use
that with the appropriate diameters I think. If I can find it I can
send it to you.
The calculations are straight forward, but the equations are not
short. It can be done though and will be reasonably accurate as long
as your diameters are similar. - Duffey
On Dec 3, 2008, at 1:20 PM, Tim Tuck wrote:
> Nigel Gunn G8IFF/W8IFF wrote:
>> What's the difference between a metric version and any other version.
>> Just multiply the inches by 25.4 and it will be metric.
>>
> While it would be nice if it was that easy the problem arises when
> trying to buy aluminium in those odd sizes. i.e. 1/4inch is 6.45mm.
> Local aluminium suppliers don't have imperial sizes so I'm stuck with
> 5mm, 10mm, 15mm etc. thus the math needs redoing for the different
> sizes
> and I was wondering if anyone had done that before I attempt it. :)
>
> regards
>
> Tim
>
>
> --
>
> VK2XTT :: QF56if :: BMARC :: WIA :: AMSAT-VK :: AMSAT
>
> _______________________________________________
> 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
--
KK6MC
James Duffey
Cedar Crest NM
------------------------------
Message: 12
Date: Wed, 03 Dec 2008 21:02:31 -0500
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Subject: [amsat-bb] Re: EZ-lindenblad info
To: James Duffey <JamesDuffey@xxxxxxx.xxx>, "Tim Tuck"
<timt@xxxxxxx.xxx>
Cc: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <20081204020231.8C422Vk00WVmD@xxxxxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 08:28 PM 12/3/2008, James Duffey wrote:
>Tim - What you need to do is calculate the reactance of the elements
>with the diameter of the specified elements. Then calculate the length
>of the element with the new diameter so that the reactance of the new
>element is the same as the old one. I think that the corrections may
>not be significant if the diameters are not too far apart.
Dear Friends,
Fortunately, it is not that complicated.
3/4" tubing is close enough to 20 mm so
that it won't make any difference.
73,
Tony AA2TX
------------------------------
Message: 13
Date: Thu, 04 Dec 2008 07:05:11 +0000
From: David Johnson <dave@xxxxx.xx.xx>
Subject: [amsat-bb] Re: AMSAT power point presentation wanted
To: Mike McConnell <w0pd@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <49378127.5010307@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Mike,
You can use mine at:
http://www.slideshare.net/g4dpz/amateur-satelllite-beginners-presentation
Which is available for download.
73
Dave
G4DPZ
AMSAT-UK 1267
AMSAT-NA LM-2260
Mike McConnell wrote:
> I am going to do a 20-minute or so presentation on Ham Radio to my local
> Kiwanis club. They saw an article in the local newspaper a couple weeks ago
> after I was able to speak with Owen Garriott. They thought it would be
> interesting to learn a bit about satellites.
>
>
>
> I wonder if there is anybody out there who already has a power point
> presentation concerning AMSAT & SAT operations that I could use.
>
>
>
> Thanks
>
>
>
>
>
> Mike McConnell, Ph.D.
>
> W0PD
>
> AMSAT #36792
>
> ARRL#0001168388
>
>
>
> _______________________________________________
> 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, 3 Dec 2008 23:36:13 -0800
From: "Tim Goodrich" <tim@xxxxxxxxxxx.xxx>
Subject: [amsat-bb] newbie
To: <amsat-bb@xxxxx.xxx>
Message-ID: <040801c955e2$fcf738c0$f6e5aa40$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hi all,
I'm Tim, KC2DDS, operating from Torrance, CA (Los Angeles area, DM03).
Although I've had my license since I was 17 (1997), I'm just now getting
back into things and especially satellites. My absence from AR probably has
something to do with needing a break after 4 years of active duty in the Air
Force where I maintained and operated the 27 radios aboard the E-3 AWACS J
(making contacts on SATCOM systems is much easier using military equipment
on dedicated frequencies and geosynchronous satellites than it is using a 5w
HT and a handheld antenna on a hamsat!)
Here's the chronology of the last week, which may sound familiar to some:
Last Friday: Built a UHF Yagi which enabled me to hear signals
Saturday: Listening wasn't enough, so I went to HRO and bought an Arrow dual
band antenna so I could transmit
Sunday and Monday: Made my first contacts
Anyway, I just wanted to write to introduce myself. Hope to make contact
with you all eventually.
Tim
KC2DDS
------------------------------
Message: 15
Date: Thu, 04 Dec 2008 02:20:41 -0800
From: Phil Karn Jr <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] 1984 Orbit Magazine now online
To: amsat-bb@xxxxx.xxxx karn@xxxx.xxx
Message-ID: <4937AEF9.5050807@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Ralph, W0RPK, has sent me the last of his batch of scanned AMSAT Orbit
Magazine from the early days of AMSAT. This batch takes our collection
up to issue 19, November-December 1984.
For those of you who may not remember, that was a very interesting
chapter of AMSAT history beginning with the loss of Phase III-A in May
1980, the launch of the University of Surrey's first spacecraft
UoSAT-Oscar-9, the continued determination of the Phase III team, and
the successful launch of AO-10 in the summer of 1983.
I personally got involved with AMSAT right after the Phase III-A loss.
so I have some pretty fond memories of those years.
73, Phil
------------------------------
_______________________________________________
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 631
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