----- Original Message ----- From: jim@beeson.cc To: AMSAT-BB@amsat.org Sent: Saturday, February 24, 2007 7:07 PM Subject: [amsat-bb] Eagle and AO40

I am curious at the thoughts of current satellite users. As I read the

AMSAT Journal and see the progress of the Eagle Project, it reminds me of a few years ago when another "do it all" satellite was being planned - AO40. Amateurs are pumping thousands of dollars and time into this project. I remember I followed AO40 with great excitement, not to mention spending a few grand upgrading my station to be ready for this "super bird". And after all the things that went wrong after the launch, I thought - never again.

So my question is basic: why spend all this money and wait years for

something that might end up another catastrophe?

Hi Jim, WA5QAP

When AO40 was launched I was prepared to work the bird in about all modes but AO40 died at the beginning of 2003 and actually my unusable antennas and equipments are becoming rusty on the roof waiting for P3E hopefully at the end of 2008 but AO40 was the best satellite ever made by AMSAT and AO40 was an exciting satellite until lasted.

Why do we have to try and design a bird that does it all? We all know the more complex the bird the more room for failure.

It was not the complexity of AO40 to determine it's catastrophe but a human mistake.

Why not just pop out another AO13 - or similar?

P3E will be just similar to AO13 but the only problem is the elapsed time between the end of 2008 when P3E will be hopefully operational and the end of 1996 when AO-13 died ( 12 years ) or between the end of 2008 and the beginning of 2003 when AO40 died (6 years )

I can't tell you how many hours of fun I had with RS10/11.

I agree with you and it was fun using very simple and not sophisticated CW and SSB equipments by the way waiting for the future a lot of hams are actually using the same equipments with the old AO-7 and FO-29 or VO-52

And with the way things are in amateur radio now, who knows if there will be anybody

even

interested in this by the time Echo finally is useable.

Look please at the AMSAT-BB archive and read the matters in discussion from the end of 2000 and the beginning of 2003 when AO-40 was operational and compare the above 2 years of interest in satellite communications with the actual enthusiasm beginning from 2003

Just a thought. I would like to hear yours now please.

I would like to have a new HEO satellite operational to find again my old satellite friends all over the world that I missed when OSCAR-10, OSCAR-13 and AO40 died !

Jim Beeson WA5QAP

73" de

i8CVS Domenico

At 09:07 AM 2/24/2007, jim@beeson.cc wrote:

I am curious at the thoughts of current satellite users. As I read the AMSAT Journal and see the progress of the Eagle Project, it reminds me of a few years ago when another "do it all" satellite was being planned - AO40. Amateurs are pumping thousands of dollars and time into this project. I remember I followed AO40 with great excitement, not to mention spending a few grand upgrading my station to be ready for this "super bird". And after all the things that went wrong after the launch, I thought - never again.

So my question is basic: why spend all this money and wait years for something that might end up another catastrophe? Why do we have to try and design a bird that does it all? We all know the more complex the bird the more room for failure. Why not just pop out another AO13 - or similar? I can't tell you how many hours of fun I had with RS10/11. And with the way things are in amateur radio now, who knows if there will be anybody even interested in this by the time Echo finally is useable.

Just a thought. I would like to hear yours now please.

Jim Beeson WA5QAP

Jim,

First let me state that this is my personal opinion, and I'm not affiliated with any satellite project team.

I share your concerns and hope that we do not go down that road again. I too, invested in my home station heavily. More so, many invested heavily into AO-40! The circumstances at the time of AO-40 were a one-time opportunity for a great ride into orbit that could support a "does-all" satellite.

But time passes and the technology and even parts availability for re-building a AO-13 is not there (exception to be noted in a minute - so, hold that thought). Therefore it makes sense to build with current technology and better parts...hoping our project team members have not lost track of lessoned learned the hard way.

P3E is pretty much a AO-13 cookie-cutter special. Well, not exactly, but the space-frame is, I understand. So this will be the satellite you ask for (sort of). Eagle will not be out of the same cake-pan, time moves one, and also the rides change. In fact no one knows what the ride will end up being (team probably has a list of wannabes, or is that wanna-go's). The issue is that rides are years off, so its not the bird holding us up.

Also, changed is the RF environment making some of the old satellite modes less effective (or prudent to use). This is actually a bigger problem.

Be assured that neither P3E or Eagle are close to being another AO-40. One will be somewhat similar to AO-13, the other all-new. As I read my Journal, I read that several lessons were being applied.

73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep dubususa@hotmail.com ======================================