Does anyone have a working G5400 or G5500 az/el rotator for sale?
I may also be interested in a Yaesu azimuth rotator, as I already have a
g500 elevation rotator.
I'm not sure which azimuth rotator Yaesu uses for their az/el, might be nice
to know if anyone can tell me.
Thanks for reading. The CubeSats STRAND 1 and AAUSAT3 are no longer
part of tle-new.txt
but I can't find them in any of the other tle file. Does anybody now
where they will be
With regards PE0SAT
Internet web-page http://www.pe0sat.vgnet.nl/
Dear AMSAT Community,
As we have done in the past, we are surveying the community for ground
station capabilities. The goal is to estimate how much capacity the
community has and our ability to support a variety of missions.
The survey is located online at: http://gs.engin.umich.edu/gs_survey/
Some of our initial results are published there from a few years ago. If
you have a ground station, we would love to hear from you!
Thanks for your help.
James W. Cutler, Assistant Professor
University of Michigan
Department of Aerospace Engineering
1320 Beal Avenue
3013 FXB Building
Ann Arbor, MI 48109-2140
Hi, about two years ago, I started a design for a robotics class project of
a AZ-EL rotator controller system, and a hardware package for the mechanism
for rotating an antenna in any direction subject to mechanical stops. The
system would have been able to handle regular and flip modes. I didn't do
anything more than calculations, and moved on to building a classroom
instructional robot then.
Lately, as I am setting up (K3GWU, the George Washington University Amateur
Radio Club and Research Station) I find that the price of az-el systems
such as G5500 + Yaesu AZ-EL rotors are expensive, and are not typically
available on an affordable basis on Ebay or eham.net etc. Well, of course,
expensive is a relative term, for a student hobby organization, it's a lot,
and I guess for small ham operators it is also moderately expensive.
This may be a frequently asked topic: does any one have experienced with
(tested) kit designs for AZ-EL rotors that can be made with parts from
current suppliers ? I know there are a number of controller designs, but I
am interested to know if there are any options for suppliers of the
required gears/motors etc.
I have located several large AC motors / DC motors at my university
mechanical engineering workshop, but they are not all guaranteed the same
specs. I now realize if I do embark on a actual design process with my
model/simulation/hardware, it would be nice to build several of these all
at once to share the development cost over the production run, and ensure
those who want a cheap AZ-EL system can get one. Otherwise the production
cost of one heavy duty system is going to be quite high.
I hope some of you may have suggestions for me, both (+) and (-) or perhaps
(~) in nature. I thought amsat / amateur radio folks have a common need to
encourage homebrew activity to keep their brain cells in working condition?
I'm opening this question up to the national US audience, and welcome any
discussion on the challenges of making the ever-so-important
azimuth-elevation rotor. I've studied some of the alternatives: Alliance
U100 and Yaesu G-5500. I think we can do better in 2013. But ideally, to
allow the wide adoption of AMSAT ground stations, what price point would
the system have to be to make it worth building ?
73 de N3RDX
George Washington University
Hello to all,
FO-29 is getting close to apogee and has a big footprint around the 1400z
passes. Please, if you are into the footprint with EL92sd and want to try a
contact, just drop me an off list email. I will be happy to try a contact
I can operate portable from a tall building where I can work FO-29 until LOS
and sometimes below the horizon.
Cubans cannot operate on AO-7 mode B due to a 432MHz restriction in our
country, so we have only a few chances every five months to try distant
contacts on Sat.
Please, if you know about someone who want to try but doesn't read AMSAT-BB,
I will appreciate the information.
Thanks & 73!