You may want to consider a Quadrifilar Helix antenna. I think it will
accomplish what you're looking for. I just built one using the design in the
most recent QST and am very pleased with the results. I'm sure its easier to
construct than a lindenblad as well. I did mine in less than 3 hours. I
cou
Hello Luc,
I have some questions.
1- What is the logical direction, in your opinion?
2 - How much would that direction cost, in your opinion?
3 - How would you propose paying for that direction?
I look forward to learning more so that I can more fully understand your
positioin.
73,
Tim -
On 13 Oct 2009 at 18:42, Tim - N3TL wrote:
Date sent: Tue, 13 Oct 2009 18:42:15 -0700 (PDT)
From: Tim - N3TL
Subject:Re: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: Luc Leblanc , amsat-bb@amsat.org
Copies to: eu-am...@yahoogroups.com
> Hello Luc,
>
> I have
Hi Alan,
Absurd? I suppose you could look at it that way. But another way is to
consider this a natural progression to larger and larger integration. The PC,
tracker box, rotor control box, etc., are all building blocks for the final
system, just as assembling a larger number of smaller int
Yeap...it is generally either concrete or lead...and the concrete is
favored..something in my memory says however the ones on TDRSS were lead.
somewhere I probably have a picture of the ballast being attached to the
"bird". Indeed I got a letter published in both AV Leak and Navy Times (as I
When I picked up these KLM's over in Lompoc, the fellow works at Vandenburg,
and he told me that alot of the ballast is nothing but concrete !! Can you
imagine all that concrete chunks out there and they know where the majority
areamazing.
- Original Message -
From: "Rocky Jones"
http://spaceflightnow.com/news/n0910/13tdrs/
as I recall there were 50 some odd pounds of ballast launched with the
bird...to bad it wasnt an amateur repeater.
Robert WB5MZO
_
Hotmail: Tru
Bob- W7LRD wrote:
>
> I coppied you in bits and pieces Dale. From what I understand the
> 435.15 downlink is LHCP and my 70cm antenna is RHCP. It is switchable
> I just have never hooked it up. This is my next project! I must
> remember-"if this were easy, then everyone would be doing it!".
- Original Message -
From: "David Wing"
To:
Sent: Tuesday, October 13, 2009 9:37 PM
Subject: [amsat-bb] KLM 2M-14C...waterproof the polarity switch?
> Anyone out there with KLM antennas with the polarity switch care to
comment
> on whether you have put a housing on the switch to protect
To all the gents who were on the last pass of AO-51. Joe (SZH) was listening
but is having transmitting/antenna issues. Dale I heard you near my LOS,
better luck next time. These "different" modes are fun and usefull for
checking out new equipment projects . The usual list of characters (Y
"The new AMSAT CubeSat's initial capability is planned to add to the popular
low-earth orbit FM transponder fleet
allowing hams to continue to use their existing handheld and portable antenna
systems. This also continues the accessible
entry path for new satellite operators to get started. Th
Yes, it is.
Jim
--- On Tue, 10/13/09, Joe wrote:
> From: Joe
> Subject: [amsat-bb] Re: KLM 2M-14C...waterproof the polarity switch?
> To: w6...@comcast.net
> Cc: amsat-bb@amsat.org
> Date: Tuesday, October 13, 2009, 3:37 PM
> if i remember correctly isn't KLM the
> predisessor (sp?) of M square
if i remember correctly isn't KLM the predisessor (sp?) of M squared?
w6...@comcast.net wrote:
>David the one I got the previous owner just put RVT all over it, except the
>RCA jack. I need to redo it, but it's raining, hi. The 435 yagi came with an
>aluminum box enclosurewonder why they di
Not Yet
Perigee Height is now below 200km but Cute 1.7 Object #28941 is still in orbit
Re-Entry predictions for around mid day October 13th from EI7IG and W7LRD
therefore drop out of the competition.
Is she staying aloft long than expected because of a high mass to surface area?
73 John G7H
Hi Eric,
Oops - yes - I should alsways check what I am told before relaying it!
Thanks for the correct correction:)
73
Graham
- Original Message -
From: "Eric Knaps, ON4HF"
Cc:
Sent: Tuesday, October 13, 2009 10:34 PM
Subject: [amsat-bb] Re: SUMBANDILASAT *update on amateur payload*
Samudra,
I think that typically on FM repeaters, you should be able to understand the
letters being spoken as easily as phonetics since there is usually so little
noise on a local FM repeater as compared to a satellite signal where you are
dealing with fading and QRM much of the time. BTW, thank
At 07:53 AM 10/14/2009, David - KG4ZLB wrote:
>Perhaps these could be translated into Spanish!
If anyone wants to translate them into any language, go right
ahead. Just make a note where the source for the translation came from.
73 de VK3JED / VK3IRL
http://vkradio.com
I do that on FM repeaters and on the birds when I'm working with people who
recognize my call sign or are likely to. I'll switch to phonetics if there
is someone new to me or when I'm calling CQ
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Be
Probably because David is not a member of the approved NATO alphabet.
Samudra Haque N3RDX wrote:
> I asked as I am still puzzled why in the US on local FM nets hams just
> use "n,3,r,d,x" instead of "november three romeo david x-ray".
___
Sent via amsat.
David the one I got the previous owner just put RVT all over it, except the RCA
jack. I need to redo it, but it's raining, hi. The 435 yagi came with an
aluminum box enclosurewonder why they didnt do the vhf yagi the same ??
Course we'll never know as they are out of business.
John
-
I think 145.880 is the uplink frequency. Downlink should be 435.350
73,
ON4HF.
Eric Knaps
Waterstraat 30
B-3980 Tessenderlo
Belgium
Tel. +32472985876 (mobile)
http://www.on4hf.be
Graham Shirville schreef:
> I understand that there is a possibility that the 145.880MHz TX will be kept
> on fo
Thanks
Yes a small 10 inch laptop could do the work, predict would be used and
frequent kep updates
The laptop would also make decisions like
If two sats were up, what is the priority
It is a good project because it covers off
1. Mechanical
2. Programming PERL and ASM (PIC)
3. Installing and
I am looking also.
Dave KB1PVH
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Charles Suprin
Date: Tue, 13 Oct 2009 17:02:38
To: AMSAT-BB
Subject: [amsat-bb] Looking for K5GNA Downconverter
Hello,
Some offer to sell these here. I thought I would offer to buy
Hello,
Some offer to sell these here. I thought I would offer to buy one. I am
looking for the handheld version with the reflector if anyone has decided
they have had enough.
Charles
AA1VS
___
Sent via amsat...@amsat.org. Opinions expressed are those
I asked as I am still puzzled why in the US on local FM nets hams just
use "n,3,r,d,x" instead of "november three romeo david x-ray".
On Tue, Oct 13, 2009 at 4:59 PM, Tony Langdon wrote:
> At 07:30 AM 10/14/2009, Samudra Haque wrote:
>>
>> on a satellite QSO, is it traditional to say "A, B, C"
How to ADD a new keplerian file using NOVA?
I copy the kepler data to a empty txt file, but got alert "does not appear
to be a valid Leplerian element file."
I have this:
SUMBA
1 35870U 09049F 09285.11645204 .0399 0-0 20021-4 0 713
2 35870 097.3690 334.7270 0010989 202.0614 210.2918 15.22
I understand that there is a possibility that the 145.880MHz TX will be kept
on for one complete orbit. If this is correct then we could hear the
satellite in Europe from approx 19:20 UTC depending on your exact location
73
Graham
G3VZV
- Original Message -
From: "Chris Bloy"
To:
Sen
At 07:30 AM 10/14/2009, Samudra Haque wrote:
>on a satellite QSO, is it traditional to say "A, B, C" instead of
>"Alfa Bravo Charlie" for brevity when referring to call signs and grid
>locators ?
That can backfire and waste time, due to people not understanding the
letters. For example, my calls
Domenico I8CVS did it and I copied his method.
Pictures here mine:
http://picasaweb.google.com/ve4yz.alan/I8CVSWXProofKLM#
73, Alan VE4YZ
EN19kv
AMSAT LM 2352
http://www.wincube.ca
> -Original Message-
> From: amsat-bb-boun...@amsat.org
> [mailto:amsat-bb-boun...@amsat.org] On Beha
Perhaps these could be translated into Spanish!
David
KG4ZLB
Eric Knaps, ON4HF wrote:
> Hello all,
> I found these nice rules from VK3JED:
>
> 1. First and foremost is to listen before and while (if possible)
> transmitting, to ensure your transmissions don't drown out a weaker
> sta
on a satellite QSO, is it traditional to say "A, B, C" instead of
"Alfa Bravo Charlie" for brevity when referring to call signs and grid
locators ?
On Tue, Oct 13, 2009 at 2:24 PM, Eric Knaps, ON4HF
wrote:
> Hello all,
> I found these nice rules from VK3JED:
>
> 1. First and foremost is to liste
>From the Amsat SA pages :-
STOP PRESS
The First test of the amateur payload will be carried out on 14 October
during the 21.12 CAT pass. Watch for updates here
Update from Ground Control
13 October 2009
Source : http://www.amsatsa.org.za/
Chris - M0DQO
___
I'd put a little plastic or Tupperware box over it.
The 70cm version that I have has only been used for Field Day, so it's not been
outside much, but it definitely shows signs of having been damp.
73, Jim KQ6EA
--- On Tue, 10/13/09, David Wing wrote:
> From: David Wing
> Subject: [amsat-bb]
Anyone out there with KLM antennas with the polarity switch care to comment
on whether you have put a housing on the switch to protect it from the
elements? It looks like the relay has silicon around the base but it just
grates me the wrong way to have a circuit board with a power connection and
c
Hello all,
I found these nice rules from VK3JED:
1. First and foremost is to listen before and while (if possible)
transmitting, to ensure your transmissions don't drown out a weaker
station who may be on the edge of a pass or running QRP. Satellites
should be an alligator free zon
Hello is there a commercial source of EZ-Lindenblad antennas for
mounting on a convention A-frame rooftop ? I have read AAT2X's paper
describing how to homebrew, but want to look at buying a pre-built
version to get started quickly with no need to rotate/elevate on the
RX side.
Regards,
Samudra,
I will be on AO51 L/U on the afternoon evening passes today.
Dale / KL7XJ
___
Sent via amsat...@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http
Nice idea Gregg. We do a few near space balloons each year and I have been
bugging some other folks ( because I don't write code ) to consider 2
projects:
1 - rotator control in a moving vehicle to keep a small yagi such as an
Arrow pointed at the APRS signal.
2 - antenna parking based on data f
I'd like to suggest that such systems should have a compass input from a GPS
too
so that as I'm driving mobile, I can have such a rotator strapped in the back
of
my truck, and be able to have it track the pass so I can hear it, and grab the
mic and talk if I need to. I'd also use this for mob
Bob,
Just saw the message about L band being activated and
checked it out on the morning western pass. Signals were
much stronger on 435.300 than they were on 435.150 and I
do have polarity switching. Seems like more than 3db.
No one was on the 1303z pass but if you are full duplex,
you can alw
Marc, Andrew and the group...
It has always struck me as being odd that we use a PC to run a PC(PIC based
tracker box), to run a rotator control box, to run a rotator. Sure it works
but the absurdity of this really hits home when you disassemble your shack
to take it all out for Field Day or an
This is a quick heads up for two excellent North American mid-continent ISS
passes conducting ARISS School QSOs. 145.800 MHz is the downlink.
First one is today, Tuesday - and next opportunity on Wednesday.
Boundary Beach Elementary, Delta, BC, Canada on Tuesday 13th October at
17:10 UTC. This is
Hello everyone,
News from the 2009 AMSAT Space Symposium in Baltimore has been posted on our
web site: http://www.amsat.org
(the link to ARISSat-1 should be back in service soon.)
--
73 de JoAnne K9JKM
k9...@amsat.org
Editor, AMSAT News Service
Copy Editor, AMSAT Journal
Thanks everyone for the great interest and the kind words.
As expected the units sold immediately and will have a new home soon.
If anyone is interested in some AMSAT satellite memorabilia (the good
old days of oscarlocator) please see the following auction on Ebay.
280409075816
73, Stefan,
Kewl
Do you convert
"067" from ascii to binary and then compare that to an A/D value ?
I have worked out how to do binary to ascii
Sometime I wonder if just programming in perl on the LINUX side might be
just as easy
I think potentiometers are used on most rotators ?
Unless stepper motors ha
Hi Andrew,
Let's take azimuth as an example. The PC sends a string containing the ascii
value of the required azimuth. That value is converted to a binary value.
That binary value (0-360) is converted to an "expected" 10-bit ADC value
(theoretically 0-1024) for that angle.
The range I get from m
Hi Andrew,
I have a PIC based solution currently in the prototype stage. It uses a
PIC18F4455 and drives a Yeasu AZ/EL rotor without the Yeasy control box.
The PC sends information to the PIC (RequestedAZ,RequestedEL) and the PIC
sends back status information to the PC
(RequestedAZ,RequestedEL,C
Thank you
- Original Message -
From: Stefano Simonetti
To: Andrew Rich ; amsat-bb@amsat.org
Sent: Tuesday, October 13, 2009 9:01 PM
Subject: Re: [amsat-bb] PIC rotator control
Wouldn't you like flashing the pic with the G6LVB tracker firmware and make
the circuit? (google
Wouldn't you like flashing the pic with the G6LVB tracker firmware and make the
circuit? (google: g6lvb).
I made it with an old HAMIV rotator and a pic16F877A.
LVB tracker does a great job and speaks serial words Linux could understand.
Steve - Iw1RDZ
Da: And
Hello
I am re-visting a rotator controller.
I am curious, should I push the processing of the "compare and make a decision"
onto the PIC, or pull that function back into the PC ?
PC is LINUX
I/O is serial
PIC is 16F877
Andrew VK4TEC
___
Sent via
Some ITU Amateur Satellite Service info at
http://www.itu.int/ITU-R/space/support/ARS/index.html
A list of Amateur Radio CubeSats and larger Amateur Radio Satellites whose
frequencies have been co-ordinated by the International Amateur Radio Union
(IARU) is at
http://www.amsat.org.uk/iaru/
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