On Wed, 2009-10-14 at 07:20 +1000, Andrew Rich wrote:
> Thanks
>
> Yes a small 10 inch laptop could do the work, predict would be used and
> frequent kep updates
I'm looking at using a mini2440 board for just such a thing - ARM9 CPU,
masses of GPIO, a couple of serial lines, USB host *and* slave
On Fri, 2009-10-23 at 08:24 +1000, Andrew Rich wrote:
> I have used MPLAB and an imitation picstatrt programmer
>
> I use OLIMEX development boards and my role out is very quick
>
> I decided to use assembly because it made me think and understand how a PIC
> works
Assembler is the right choice
JoAnne Maenpaa, K9JKM, wrote:
>I guess you're observing that AMSAT's GEO proposal has to fit into the GEO
satellite commodity market.
Should Amsat be working with NetHope to design a better terminal? How do we
work with these guys to convince them that they should be using a ham
satellite instead
Sounds nice.
One thing I have to keep an eye on is power being drawn from the USB if I am
to use any sort of relays
- Original Message -
From: "Gordon JC Pearce"
To:
Sent: Wednesday, October 28, 2009 5:45 PM
Subject: [amsat-bb] Re: PIC rotator control
> On Wed, 2009-10-14 at 07:2
Hi Guys, anybody looked at http://www.mikroe.com/ for building your
controlled prototype.
I use this board for many project excellent kit and also excellent
support.
73
J-F VA2SS
2009/10/28 Gordon JC Pearce
> On Wed, 2009-10-14 at 07:20 +1000, Andrew Rich wrote:
> > Thanks
> >
> > Yes a s
Very expensive and complete overkill
- Original Message -
From: "Jean-François Ménard"
To: "Gordon JC Pearce"
Cc:
Sent: Wednesday, October 28, 2009 9:51 PM
Subject: [amsat-bb] Re: PIC rotator control
Hi Guys, anybody looked at http://www.mikroe.com/ for building your
controlled prot
It is a prototype board for many project... An exellent learning tool !!
2009/10/28, Andrew Rich :
> Very expensive and complete overkill
>
>
> - Original Message -
> From: "Jean-François Ménard"
> To: "Gordon JC Pearce"
> Cc:
> Sent: Wednesday, October 28, 2009 9:51 PM
> Subject: [amsa
I would add my vote for that. NOVA is a great program, and with slightly
fancier graphics. However, SatPC32 just works, and works well. It easily
handles even Mode-S. The learning curve is very moderate, the documentation
is superb, and the support is even better. Honesty requires me to commen
Has anyone tried out the Diamond 2m or 70cm yagis? If so, do they do a pretty
good job? They sure are priced nice. I am especially interested in the
A430S15 15 element UHF yagi model.
73s John AA5JG
___
Sent via amsat...@amsat.org. Opinions
Hi Eric.
I have been using Fodtrack along with F6DQM's (Gabriel Rivat) excellent
programme Sat_Explorer for over a year now, with no trouble whatsoever,
Fodtrack was home built a long time ago in the days of KO-23, UO22 etc and has
never given any trouble.
Gabriels programme SAT_Explorer can be
Hi Bob, W7LRD
I need to answere your question as well via AMSAT-BB because my emails sent
to w7...@comcast.net are alwais rejected to me by your provider.
From the point of view of Amateur Radio the best I can suggest to you is the
book " The Satellite Experimenters Handbook " by Martin
Cute Re-entry Competition
Winners Declared
It seems that when a satellites, reache an altitude as low as about 170km they
will be down very quickly. According to Space Track elements, and InstanTrak
tracking software Cute was still orbiting when the perigee was below 150 Km.
My theory is t
In the proverbial "pinch", emergency that is unexpected, we can still
deploy our I-gate feed over there $$Expensive$$ satellite feed and keep
on truckin' with our APRS system as it evolves, probably faster than the
"government appropriations" for those big guys that can do all, see all,
but not
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 acti
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
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
___
Sent via amsat...@amsat.org. Opinions expressed are those of the author.
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"
Sent: Wednesda
>
> 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 rea
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: glasbren...@mindspring.com
> To: samudra.ha...@gmai
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 +.0003 +0-0 +1-3 0 07665
2 00602 087.3316 050.1
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
___
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 ar
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
di
- Original Message -
From: "Samudra Haque"
To: "Amsat-bb"
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 Joh
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...@amsat.org. Opinions expressed are those of the
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 wrote:
> From: Michael Tondee
> Subject: [amsat-bb] Centerfire Yagi antennas
> To: "Amsat BB"
> Date: Wednesday, Oc
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
>
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
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
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
Are you able to put up a "temporary" mast of modest height? I've used a 2
foot section of fence pipe in a bucket of quickcrete as a base and then use
a smaller diameter of fence pipe to slide into the piece that is held in the
bucket of cement. I've gone as high as 30' with this kind of set-up by
I just review my DVD recording of the ARES 1-X launch, what a spectacular
launch for the tallest rocket in the world. It was amazing to
see how in 3 years this rocket pass from a paper sheet to a 300 foot rocket.
But it could be the first and the last launch for this amazing 450 millions
rocke
Build a 2m and 70cm Quadrifilar Helix- they'll give you coverage virtually
horizon to horizon. Stick them on the roof by using a number of hose clamps
to attach the PVC mast to one of the roof's metal plumbing vent pipes (not a
gas exhaust or anything with hot air).
Low profile, completely tempora
Would like to know the how to do WFM for 137Mhz on the 817 as well, if its
possible.
Tim
KI6VBY
___
Sent via amsat...@amsat.org. Opinions expressed are those of the author.
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