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CX2SA > SATDIG 04.11.09 22:05l 223 Lines 6394 Bytes #999 (0) @ WW
BID : AMSATBB4586
Read: GUEST
Subj: AMSAT-BB-digest V4 586
Path: IZ3LSV<IK2XDE<HB9TVW<F4BWT<F4DUR<CX2SA
Sent: 091104/2004Z @:CX2SA.LAV.URY.SA #:14984 [Minas] FBB7.00e $:AMSATBB4586
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Please help me design a polarity switcher... (i8cvs)
2. video: satellite power-saving through on-board tracking
(Bruce Robertson)
3. XE3DX EK15,25,26 Operation Wrapup (John Papay)
4. Home Back (xe3dx)
5. JA QSO?? AO-7 (Bob- W7LRD)
----------------------------------------------------------------------
Message: 1
Date: Wed, 4 Nov 2009 17:27:38 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Please help me design a polarity switcher...
To: "Elan Portnoy" <elanportnoy@xxxxx.xxx>, "AMSAT-BB"
<amsat-bb@xxxxx.xxx>
Message-ID: <002e01ca5d6b$b9bdfbc0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Elan Portnoy" <elanportnoy@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, November 04, 2009 6:24 AM
Subject: [amsat-bb] Please help me design a polarity switcher...
> I have both vertical and horizontal elements of my 70cm yagi coming into
the shack via separate runs of LM400. They meet in a box with bits of coax
for matching and phasing before going to the radio.
>
> I would like to add a relay to make polarity changes quick and easy. Do I
need to use a specific type of relay or will a garden variety DPDT from
Radio Shack be sufficient?
>
> Thanks,
> Elan WB2IOL
Hi Elan, WB2IOL
Read please the article " Switching Four Polarizations on a 70 cm Crossed
Yagi "
Part-1 AMSAT-Journal March/April 2007
Part-2 AMSAT-Journal May/June 2007
In a separate email I have sent to you a pdf file for both articles.
73" de
i8CVS Domenico
------------------------------
Message: 2
Date: Wed, 4 Nov 2009 12:43:06 -0400
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] video: satellite power-saving through on-board
tracking
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<49657a760911040843w1be67c95sc2b8362d27eaf4e1@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
In a further exploration of the use of the Plan 13 algorithm in Atmel
(or similar) micro-controllers, I've posted a youtube video and
related text that suggests how an amateur satellite could use such a
device on board to change its mode based on its location over the
earth.
http://sites.google.com/site/qrptracker/applications/modeswitcher/
The video includes a sped-up night-long tracking session, some current
consumption testing on the bench and a calculation of the power
budget, which show that even for birds transmitting in the tens of
milliwatts, this approach can provide about a 14% improvement in power
budget.
73, Bruce
http://ve9qrp.blogspot.com/
------------------------------
Message: 3
Date: Wed, 04 Nov 2009 12:32:10 -0500
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] XE3DX EK15,25,26 Operation Wrapup
To: amsat-bb@xxxxx.xxx
Message-ID: <452368.87385.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Hi all,
I am back home, I want to thank all the support John, K8YSE, always
send messages from my activities on the grids EK15, EK25 and EK26,
thanks John, and all of you for always being attentive to my call.
Wanted to schedule everything very well, but my trip was with my
family, I had to hide the radio and antenna to avoid being caught,
was a vacation! for my radio is my vacation, I made a deal with my
wife on my satellite activities.
I hope in a next output can schedule everything and make known,
Talves soon I activate these new grid or otherwise.
To find out if my records are in the log can be viewed online on my
webpage at www.qsl.net/xe3dx/ and know the time of contact.
Thanks again and hope to hear soon, these stations were heard:
EK26
XE2AT, K8YSE, WA4NVM, XE1AO, K4DLG, N4ZQ, N3TL, N5ZNL, WA5KBH,
???SZH, N2UZQ, AA5CK, XE1TD, XE1GRR, AA5PK, XE1FXF, XE3CIA, N9EME,
and XE1ROZ???.
EK25
HK6IOP,KN4OK, WA4NVM, K8YSE, N3TL, AA5PK, N5AFV, XE3CIA, XE1AO,
XE1MEX,and XE1AY.
EK15
N3TL, K4DLG, K0OU, XE2AT, N8MS, K8YSE, AA5CK, XE1AO, XE3CIA, AA5PK,
W4AS, K7WIN, N5ZNL and K5WSA.
XE3DX
David Maciel
------------------------------
Message: 4
Date: Wed, 4 Nov 2009 10:36:33 -0600
From: "xe3dx" <xe3dx@xxxxxxx.xxx.xx>
Subject: [amsat-bb] Home Back
Cc: xe3dx <xe3dx@xxxxx.xxx>
Message-ID: <KSLFGX$BF58132AF72093272FDE87981A349959@xxxxxxx.xxx.xx>
Content-Type: text/plain; charset=iso-8859-1
hi all, I am back home, I want to thank all the support John, K8YSE, always
send messages from my activities on the grids EK15, EK25 and EK26, thanks
John, and all of you for always being attentive to my call.
wanted to schedule everything very well, but my trip was with my family, I
had to hide the radio and antenna to avoid being caught, was a vacation! for
my radio is my vacation, I made a deal with my wife on my satellite
activities.
I hope in a next output can schedule everything and make known, Talves soon
I activate these new grid or otherwise.
To find out if my records are in the log can be viewed online on my webpage
at www.qsl.net/xe3dx/ and know the time of contact.
Thanks again and hope to hear soon, these stations were heard:
EK26
XE2AT, K8YSE, WA4NVM, XE1AO, K4DLG, N4ZQ, N3TL, N5ZNL, WA5KBH, ???SZH,
N2UZQ, AA5CK, XE1TD, XE1GRR, AA5PK, XE1FXF, XE3CIA, N9EME, and XE1ROZ???.
EK25
HK6IOP,KN4OK, WA4NVM, K8YSE, N3TL, AA5PK, N5AFV, XE3CIA, XE1AO, XE1MEX,and
XE1AY.
EK15
N3TL, K4DLG, K0OU, XE2AT, N8MS, K8YSE, AA5CK, XE1AO, XE3CIA, AA5PK, W4AS,
K7WIN, N5ZNL and K5WSA.
XE3DX
David Maciel
xe3dx@xxxxx.xxx
www.qsl.net/xe3dx/
Amateur Ham Radio
------------------------------
Message: 5
Date: Wed, 4 Nov 2009 19:42:17 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] JA QSO?? AO-7
To: amsat-bb@xxxxx.xxx
Message-ID:
<2090143204.4254391257363737764.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
Any JA's who operate AO-7 mode A.? Perhaps we can "stretch" the footprint
just a bit.? From my QTH CN87, I can "see" northern JA.? Email direct.
73 Bob W7LRD
CN87wk Seattle
------------------------------
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End of AMSAT-BB Digest, Vol 4, Issue 586
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