Don't get me wrong, the use of the suit is a marketing master-stroke. But am
I right that it's basically only there for support (both mechanically and
politically)?
Yeah, I think it's mostly for media impact. The sight of a lifeless suit
floating away from
the station is Stanley Kubrick-ish
Greg has picked up on the basic point of the endeavor for AMSAT. We are
learning about and developing a modular system that will be adaptable to
many projects. This particular project is useful for both ARISS and AMSAT
We will have an array of building blocks to configure for missions as they
It's interesting to watch how the desperation to have assets in high orbit
has driven the ideas ever more grandiose here on the old -BB. We've moved
from putting a simple transponder (as if there were such a thing) 35,000
miles over our head to landing a repeater a quarter million miles away on
Happy Independence Day.
Does anyone recognize the following antennas? I purchased them years
ago and they were part of a system I never installed. Over the years,
one of the elements has been damaged and, even though I can fix it
myself, I'd like to know who made these.
Doggonit, I cannot
Hello David,
Principally, the same as the Fyllingsdales BMEWS steerable
phased array, yes ??.
We have some info on it on OBSERVATIONS.
http://www.observations.biz)
73 John. la2...@amsat.org
Sounds like the QHTennas, made by N4QH. Reviewed in QST in 2005, then he
stopped producing them just a few months later.
Near as I could figure out, they are a conventional turnstile design, but
with the 2 dipoles separated by the length of the phasing line, and no
reflector.
George, KA3HSW
Hi Steve!
Videos of the six presentations at the AMSAT Forum at the
2009 Dayton Hamvention are now on the AMSAT website. Click on
this link
http://www.amsat.org/amsat-new/information/videoNews.php
or go to the AMSAT website and click on AMSAT Video News about
halfway down the page in the
Yes indeed. Richard's presentation at the AMSAT forum was a much shorter
version of the one he gave at the Banquet the night before and it would
be great to have that in the archives.
73
--
David
KG4ZLB
www.kg4zlb.com
Patrick STODDARD (WD9EWK/VA7EWK) wrote:
Hi Steve!
Thanks for
Oh My! Somebody else has my warped sence of humor:-) Just ask my granddaughter.
I goof with her all the time with stuff like this.
Like when she asks to get on the computer and I tell her she will break it if
she does:-)
RoD
KD0XX
--- On Sat, 7/4/09, David - KG4ZLB kg4...@googlemail.com
The product review is in the August 2004 QST. If you have access to the reviews
page you can find it under the Q listings by manufacturer.
Jim KQ6EA
--- On Sat, 7/4/09, George Henry ka3...@att.net wrote:
From: George Henry ka3...@att.net
Subject: [amsat-bb] Re: Antenna Question
To: amsat bb
- Original Message -
From: g0...@aol.com
To: kd6...@comcast.net; amsat-bb@amsat.org
Sent: Saturday, July 04, 2009 1:21 AM
Subject: [amsat-bb] The Moon is our Future / antennas
In a message dated 03/07/2009 20:46:44 GMT Standard Time,
kd6...@comcast.net writes:
Building a prototype
Thanks to all contributors for an enjoyable thread, with some very
interesting ideas, however, there is a fundamental obstacle to transponders
on the Moon. The science packages used and left on the Moon by the Apollo
astonauts had radioactive heat sources which prevented the electronics from
Yeah, I found the review on the ARRL web site by searching for QHTenna.
Looking at the pictures, it appears that the dipoles are separated by about
1/4 wave in free space, which is physically longer than a 1/4 wave phasing
line would be. And I'd think that the phasing line would have to be 1/2
I would suggest that you don't need a phasing line if the dipoles are spaces a
quarter wave and that both are fed by
equal length cables.
George Henry wrote:
Looking at the pictures, it appears that the dipoles are separated by about
1/4 wave in free space, which is physically longer than a
At 11:13 PM 7/4/2009, Jeff Davis wrote:
What about other orbits that may not be as desirable as HEO but that offer
better coverage than low-earth?
I recall reading something from G0RMF about adapting a CubeSat to include
some sort of a propulsion system to get to a mid-Earth orbit:
This idea
That's them. Thanks, George and, David, I got the dog off the webpage. ;)
Tnx,
Joel, W4JBB
George Henry wrote:
Sounds like the QHTennas, made by N4QH. Reviewed in QST in 2005, then he
stopped producing them just a few months later.
Near as I could figure out, they are a conventional
At 02:52 AM 7/5/2009, you wrote:
AMSAT as a whole (I mean the membership) needs a new challenge and dream
that will bring out the very best in it to build what ever comes up. The
Moon could be that new challenge as we have NEVER designed anything that
would actually LAND and operate in that
Since no one has replied thought I might give it another try,
while perhaps not many are familiar with MacDoppler software, I
hope some would be with the hardware and wouldn't mind offering
some help?
thanks
happy 4th
On Jul 3, 2009, at 4:47 PM, myles landstein wrote:
Myles,
My antennas/rotor are disassembled right now, as we are trying to
sell the house.
When it was all together, I used an older version of MacDoppler Pro,
a Mac G4 tower with a serial card,
and an Endeavour Auto Tracker ( http://endeavour-usa.com/
autotracker.htm ) driving a Yaesu 5400
An interesting question for the short term is what can we do with 1 watt of
RF from a LEO satellite. RS-10 and RS-12 were interesting as they required
only omnidirectional antennas but they had a lot of power available as they
were attached to much larger satellites. AO-16 was a small satellite
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