April 2007 - AMSAT-BB - mailman.amsat.org

Re: ANSAT-NA VS MILITARY cooperation
by Margaret Leber 24 Apr '07

24 Apr '07

On 4/24/07, Luc Leblanc <lucleblanc6(a)videotron.ca> wrote: > Just to remind you as i already wrote...in the past any military VS AMSAT'S > should be strongly condemned and even more by AMSAT-NA BOD. Let us know when you renounce your citizenship and move to a country that doesn't have a military, we can use another DX entity. > "A "Fidel" AMSAT observer." Cuba doesn't count. -- 73 de Maggie K3XS Editor, Phil-Mont Mobile Radio Club Blurb - http://www.phil-mont.org Elecraft K2 #1641 -- AOPA 925383 -- ARRL 39280

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Re: FM on VO-52 or others
by Edward Cole 24 Apr '07

24 Apr '07

At 06:03 PM 4/23/2007, Patrick Green wrote: >With FO-29 having trouble, I'm sure that SSB will pickup on this bird. I >wonder why the lack of popularity? I thought everyone liked Mode B. > >73 de Pat --- KA9SCF. >Amsat #35741 Good question. I'm guessing that what folks are saying when they say the like mode-B is they like the Heo orbiting mode-B satellite. The Heo provides a bigger footprint for DX and the high orbit exhibits slower changing Doppler and long passes. Just a guess. I have been reluctant to get on AO-52 mainly from the high angle and Doppler rates. Once my antennas are back up and I have full auto-track/tuning that might change. At least auto-tracking would make QSO's less stressful. Satellite operation is my "fun" mode; for a technical challenge I do eme and mw. 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(a)hotmail.com ======================================

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Libertad-1 Telemetry
by Colin Hurst 24 Apr '07

24 Apr '07

Signal copied 23rd April 14:08:38 UTC 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[23:38:38] A00O44C11I11P25R11_LIBERTAD_1COL_B:88_AA 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[23:38:40] A00O44C11I11P25R11_LIBERTAD_1COL_B:88_AA 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[23:38:43] A00O44C11I11P25R11_LIBERTAD_1COL_B:88_AA 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[23:38:45] A00O44C11I11P25R11_LIBERTAD_1COL_B:88_AA 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[23:38:47] A00O44C11I11P25R11_LIBERTAD_1COL_B:88_AA Signal copied 24th April 01:32:33 UTC 2:Fm 5K3L To 5K3USA Via BEACON <UI pid=F0 Len=40 >[10:52:33] A00O19C18I19P13R10_LIBERTAD_1COL_B:95_AA Colin Hurst VK5HI.

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Wok for studio transmitter link antenna
by Kyle Yoksh 24 Apr '07

24 Apr '07

Not exactly on-topic, but some of you may appreciate this, as I did. The story doesn't mention if this guy is a ham, but I suspect he may be.. http://www.nzherald.co.nz/search/story.cfm?storyid=000BB3C8-B910-15DC-9E5E8… 73, Kyle Yoksh KØKN Olathe, Kansas Amsat # 35249

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VO-52, Linear transponders and FM
by Bruce Robertson 24 Apr '07

24 Apr '07

Gang: The conference for VO-52's second anniversary has on its agenda a discussion about design of a Hamsat2. This good news got me thinking about the innovative aspects of Hamsat: principal among these is that it has succeeded in using convention to determine the mode of operation. What I means by this is that, as I understand it, in regions of the world where SSB rigs might be in low supply, it is common practice, encouraged by the satellite's operators, to use its linear transponders to relay an FM signal. Here in N.A., and Europe, we use VO-52 nearly exclusively in CW/SSB. I can't speak for the rest of the world, but I'd say that in this neck of the woods, this approach has worked very well. I've only once or twice heard an FM signal on VO-52, no more often than other birds, and rare enough that I can assume it was by accident or ignorance. Given VO-52 success in this score, I wonder: a) if the operators of other, future, LEO linear birds should likewise permit their use in FM over appropriate regions of the globe. Since FM is such a high duty cycle mode, I suspect usage and battery load statistics from Hamsat might be helpful in guiding others' choices in this matter. b) what advantage there is in launching a FM-only bird when a linear one can be used in both modes. I assume there must be reasons of efficiency, etc. since the designers of KiwiSat, for example, are making circuitry for both modes. 73, Bruce VE9QRP

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Re: FM on VO-52 or others
by Tony Langdon (ATC) 24 Apr '07

24 Apr '07

> If you don't TX with the lower power, you basically turn the > linear transponder into a single channel FM satellite and no > one else can use it. Maybe a job for a future SDX to sort out. :)

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CAPE and VO-52 [Fwd: Re: CW telemetry]
by Jonathan Wagner 24 Apr '07

24 Apr '07

I thought this would interest the list considering the recent conversation on VO-52 and FM vs. SSB modes. After CAPE-1 disappeared for a couple days, it decided to make it's re-debut on VO-52's transponder. They just happened to be in view as CAPE-1 came out of eclipse and decided to wake up again. Jonathan Wagner, KE5FSG -------- Original Message -------- Subject: Re: CW telemetry Date: Mon, 23 Apr 2007 19:15:35 +0200 From: OZ1MY <oz1my(a)privat.dk> To: Jussi Liukkonen <jussi.liukkonen(a)pp.inet.fi>, Graham Shirville <g.shirville(a)btinternet.com> CC: Jonathan Wagner <jonathan(a)jonathanwagner.net> References: <007d01c776be$5ce19560$2301a8c0@jussin> <000601c77941$83727520$6601a8c0(a)opasia.dk> <004201c779f8$96443050$0301a8c0(a)allgood.local> <000801c785c5$34a182c0$2301a8c0@jussin> Hi Jussi, That sounds interesting :-) CAPE1 - one of the cubesats just launched April 17th transmit at 435.245 MHz with CW (HEX data). We have not heard it since April 18th ? I just checked and they can "see" one another. 73 OZ1MY Ib ----- Original Message ----- From: "Jussi Liukkonen" <jussi.liukkonen(a)pp.inet.fi> To: "Graham Shirville" <g.shirville(a)btinternet.com>; "OZ1MY" <oz1my(a)privat.dk> Sent: Monday, April 23, 2007 6:33 PM Subject: CW telemetry > Lo Graham and Ib! > > Was just listening at VO-52 (23rd April 1620z). > > At 145.900 I could hear for about 1 minute cw telemetry. It was of the type > that FO-series satellites uses (FO-20, FO-29). > > I was too amazed to write it down except for a short period which said: > > 055FF00000 > > Is there any satellite that sends cw telemetry on VO-52's uplink (435.250 > plus minus doppler)? > > Or has some satellite broken down and started sending on wrong freq? Or has > VO-52 started sending cw telemetry? > > cheers, Jussi OH5LK > >

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Newspaper Article
by H.N.Vordenbaum 24 Apr '07

24 Apr '07

Here's a link to a nice article about KH6YY doing moon-bounce: http://www.honoluluadvertiser.com/apps/pbcs.dll/article?AID=2007704210343 73, K5HV

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Re: FM on VO-52 or others
by Anthony Monteiro 24 Apr '07

24 Apr '07

At 09:22 PM 4/23/2007, Tony Langdon (ATC) wrote: > > If you don't TX with the lower power, you basically turn the > > linear transponder into a single channel FM satellite and no > > one else can use it. > >Maybe a job for a future SDX to sort out. :) Yes. That would be pretty nice wouldn't it? If the SDX would just control the TX power on each signal independently, you would be able to run FM, RTTY, SSTV and all the other high-duty cycle modes without causing a problem. We can hope... 73, Tony AA2TX

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AIDC 3731 Downconverter for sale
by Michael Tondee 24 Apr '07

24 Apr '07

I'm having to cut back my satellite activity for awhile and need to generate some quick cash. I have an a K5GNA AIDC 3731 downconverter with 123Mhz IF output plus the DC power inserter and an attenuator for sale. This unit has the built on dipole on it. The only thing I do not have is the corner reflector. Everything is in good working order. I'm willing to part with the all the above listed items for 60.00 shipped priority mail anywhere in the lower 48 states. Contact me off list if interested. Tnx and 73, Michael, W4HIJ

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