April 2010 - AMSAT-BB - mailman.amsat.org

AO-51 L band requirements
by Bob- W7LRD 27 Apr '10

27 Apr '10

Reading the AO-51 book by Gould where he discuses the L band requirements. For occasional contact 150 W EIRP is needed. For superior performance 1 Kw EIRP needed. Assuming I start out with 10W to a 16 turn helix 40 feet away. Guesstimating- 5-8 W at the antenna, helix gain 8-12db. Guestimated EIRP about 40W (worst case). Am I figuring this correct? If so then AO-51 is performing better than what the book says. I am trying to "fine tune" what I have. Thanks 73 Bob W7LRD Seattle

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Small Satellites Symposium
by Trevor . 27 Apr '10

27 Apr '10

The Small Satellites Systems and Services (4S) Symposium takes place in Madeira from May 31 to June 4, 2010 and this year features a CubeSat Workshop. See http://www.southgatearc.org/news/april2010/small_satellite_symposium.htm 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm ----

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Request for AMSAT Booth volunteers during Dayton
by Gould Smith 27 Apr '10

27 Apr '10

Greetings, I am looking for volunteers to help out in the AMSAT booth during the 2010 Dayton Hamvention. I have a number of volunteers from the Area Coordinator pool, but could use some additonal help in manning the 6 booth spaces. Please let me know by Wed evening 28 April if you can help out. It makes scheduling easier if you will volunteer for two hour segments. Let me know what days (Friday, Saturday and Sunday) and what times (in multi-hour blocks) that you can volunteer and how many hours you wish to work each day. i.e. Friday between 1-5 for two hours and Saturday 9-3 for two, 2 hour blocks with at least an hour between the blocks. Looking forward to visiting with you at Dayton. 73, Gould, WA4SXM

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ISS APRS
by n4csitwo＠bellsouth.net 27 Apr '10

27 Apr '10

I heard ISS APRS (145.825 MHz) during the 01:21 UTC pass and now again on the 03:00 UTC pass. Dave, AA4KN

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AO-51 L mode observations
by Bob- W7LRD 27 Apr '10

27 Apr '10

This last pass up the west coast. Very good strong downlink, running a 910 @ 10W to a 16 turn RHCP helix through 40 feet of LMR400. Even good copy running 2 watts! Rx 40 el cp yagi. Early in the pass RHCP was better for rx, later and near LOS LHCP was better. Why? Only station heard was VE7CNA and he was very weak, aside from that I could only talk to myself. I know we have some L banders on the "left" coast and up there in KL7. It's lonely. 73 Bob W7LRD

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Re: Fwd: [eu-amsat] HO-68 versus AO-51
by Vince Fiscus, KB7ADL 26 Apr '10

26 Apr '10

At 01:43 PM 4/26/2010 -0400, "Mark L. Hammond" <marklhammond(a)gmail.com> wrote: >My family enjoys the zoo and the circus. You guys act like those are >bad things :) > >73, > >Mark N8MH I don't much care for Zoo's. My dad took me to the zoo once and they thanked him for bringing me back. ;) KB7ADL

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Fwd: [eu-amsat] HO-68 versus AO-51
by n5uxt＠email.com 26 Apr '10

26 Apr '10

Found this interesting from another mailing list. -----Original Message----- From: John Hackett <archie.hackett(a)hotmail.com> To: eu-amsat(a)yahoogroups.com Sent: Sun, Apr 25, 2010 3:50 pm Subject: [eu-amsat] HO-68 versus AO-51 HO-68 v AO-51 ??. HO-68 versus AO-51 - and the university downlink only satellites - (aka the FM menagerie). In my honest opinion it's a 'no contest' scenario - with HO-68 winning hands down. The two main reasons for me making this claim are ... 1) HO-68's superior orbit. 2) It's multi-mode transponders. On a typical European pass an HO-68 orbit has a footprint the covers from Spain in the west to India in the east, Norway in the north to Sudan in the south ... and all points in between. Whereas AO-51 is FM only ... HO-68 has transponders for CW, SSB as well as FM. HO-68 is (IMHO) easier to operate due to it needing less power to get into the transponders, albeit, to really take advantage of that, a knowledge of CW is required, which *STILL* shows it's great advantage as weak signal mode. When all else fails ... switch to CW. Igor, RW3XL has been operating cross-satellite with HO-68 to VO-52 and HO-68 to AO-7 ... keying the up down buttons for CW since his keyer is on the blink. For those wanting to learn, the 200mW beacon sends *SLOW* morse and it's copyable on a piece of wet string wrapped round a rusty six inch nail. I've proved this over and over on HO-68 at the beginning of passes when the elevation is under 20 degrees and a SSB just can't make it - switch to CW - Q5 copy - (Domenico, I8CVS will endorse that). I believe that HO-68 is becoming the experienced 'operator's' satellite while AO-51 will remain the platform for the potential newcomer ... where they can QRM eachother to their heart's content ... more power Egon ... MORE POWER !!! ... (with due apologies to the Hollywood film 'Frankenstein'). For me at least, HO-68 has brought the fun back into amateur satellite operating, particularly on CW ... akin to RS-10, the most popular satellite ever - (judged by the amount of users) - after the veritable old AO-7. While everyone is entitled to his or her opinion, operating FM on a satellite is about as much fun for me as watching paint dry and is, in my opinion, the worst possible way to introduce a potential newcomer to amateur satellites. My EU-Amsat co-founder, SV1BSX (SK) first used the word 'zoo' to describe the AO-51 standard of operating. There ought to be a sign on the microphone ... PLEASE DON'T FEED THE ANIMALS. 73 John. <la2qaa(a)amsat.org> __._,_.___ Reply to sender | Reply to group | Reply via web post | Start a New Topic Messages in this topic (1) Recent Activity: Visit Your Group Switch to: Text-Only, Daily Digest • Unsubscribe • Terms of Use . __,_._,___

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Re: BOD and Vince's short memory
by Andrew Glasbrenner 26 Apr '10

26 Apr '10

-----Original Message----- >From: "Vince Fiscus, KB7ADL" <vlfiscus(a)mcn.net> >Sent: Apr 26, 2010 7:55 PM >To: amsat-bb(a)amsat.org >Subject: [amsat-bb] Re: BOD and Vince's short memory > >Yes, It was a momentary lapse of memory on my part, cheerleading for linear >satellites & HEO's. Fine, I have no issue with that. Stop maligning the BOD though. Try something productive if you want to help AMSAT, HEOs, or linear transponders. 73, Drew KO4MA Evil BOD member

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SOLD- for sale-ARR SP144VDG rf switched 2 m preamp
by D. Craig Fox 26 Apr '10

26 Apr '10

The preamp is sold. Thanks Craig N6RSX NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient of this communication, or an employee or agent responsible for delivering this communication to the intended recipient, please advise the sender by reply email and immediately delete the message and any attachments without copying or disclosing the contents. Thank you.

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Re: [Moon-net] WX sealed box for Coax Relay
by Dee 26 Apr '10

26 Apr '10

I copied the AMSAT-BB with this as sometimes a hint or kink is passed on to all. You can use an old seaman's type of drain hole hint. If the hole is about 1/4" or so, get a piece of string and put a large knot on one end, pass it through the hole and add another large knot with about an inch or so protruding. As the wind blows, it knocks the string around and assists the draining. I used it in many a situation with tuners and couplers and even in satcom domes. The string acts as a deterrent to things going in and clears the hole when the wind blows. Hope this helps... 73, Dee, NB2F -----Original Message----- From: moon-net-bounces(a)list-serv.davidv.net [mailto:[email protected]] On Behalf Of WB2LLP Sent: Monday, April 26, 2010 3:29 PM To: guenter.koellner(a)mixed-mode.de; JAY Cc: moon-net(a)list-serv.davidv.net Subject: Re: [Moon-net] WX sealed box for Coax Relay Some way must be found to plug the drain holes in such a way that lets the moisture in and out, and keeps the insects out. You really do not want to open the box and find a Wasp nest. 73 de Gene WB2LLP _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

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Dayton Banquet
by Martha 26 Apr '10

26 Apr '10

The AMSAT-TAPR banquet is only 2 1/2 weeks away. If you do not have your tickets, they can be ordered at the AMSAT store. We will NOT be selling tickets at the booth nor am I taking orders over the phone. -- 73- Martha

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KP4AO EME
by PY2ZX 26 Apr '10

26 Apr '10

Hello, Some informations of my reception in Brazil: http://archangelo.net/misc/eme/arecibo/view.htm Flavio PY2ZX

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for sale-ARR SP144VDG rf switched 2 m preamp
by D. Craig Fox 26 Apr '10

26 Apr '10

Before I put this on eham and the others, I wanted to offer it up here first. This is an ARR 2 mtr GaAsFET preamp. It can handle up to 25 wts. Specs: http://www.advancedreceiver.com/page7.html It is brand new in sealed bag. I received it as part of another deal, but already have a 2 mtr preamp. These sell for $120 new. It's yours for $85.00 shipped. I take paypal or a postal money order. Email me if interested. Thanks much. 73s Craig N6RSX dcfox(a)rwglaw.com NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient of this communication, or an employee or agent responsible for delivering this communication to the intended recipient, please advise the sender by reply email and immediately delete the message and any attachments without copying or disclosing the contents. Thank you.

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Re: Nanosatellite Launch Service 6 on PSLV-C15
by Trevor . 26 Apr '10

26 Apr '10

According to Gunters Space Page STUDSAT, 437.505MHz, is also slated for the same May 5 launch, see New Indian Amateur Radio Satellite http://www.southgatearc.org/news/january2010/studsat.htm 73 Trevor M5AKA --- On Mon, 26/4/10, Trevor . <m5aka(a)yahoo.co.uk> wrote: > A presentation given by Freddy > Pranajaya on Nanosatellites to the 2009 AMSAT-UK Colloquium > can be seen on the BATC website. > > Go to http://www.batc.tv/ > Click on the 'Film Archive' icon at the top-left. > Select 2009 AMSAT Nanosatellites from the drop-down list > Click on the > icon to start the player and click on the > icon to the left of the volume control to display the > picture full screen. > There is a link just under the player to save the video to > your computer. > > This years AMSAT-UK Colloquium will be held on Sat and Sun > Jul 31 - Aug 1 in Guildford, details at > > http://www.uk.amsat.org/colloquium > > 73 Trevor M5AKA

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Arecibo on Handy
by David Barber 26 Apr '10

26 Apr '10

OK, I know nobody is going to believe this but....on my life... I have been outside with an FT-817 connected via a very short piece of coax to a Diamond A430S10R (small 10 element beam modified for handheld use) and headphones and KP4AO was just audible on SSB. Signals were inconsistent but solid enough to copy their callsign and CQ calls around 19.00UTC and the odd information exchange thereafter. Now they've switched to CW copy is a good 80%. No signal strength showing on S-Meter of course but who cares. I would never have believed it had I not heard it with my own ears. Note: NO preamp was used. David G8OQW JO01FR

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WD9EWK @ Sierra Vista AZ hamfest, Saturday (1 May)
by Patrick STODDARD (WD9EWK/VA7EWK) 26 Apr '10

26 Apr '10

Hi! On Saturday, 1 May 2010, I will have an AMSAT table at the Cochise Amateur Radio Association's Larry Warren Hamfest in Sierra Vista AZ. This is a half-day event, and one I have attended for the past two years. During the hamfest, WD9EWK should be on the air for demonstrations on the following passes: 1340-1353 UTC on AO-51 1406-1426 UTC on FO-29 1642-1655 UTC on VO-52 1807-1825 UTC on HO-68 For AO-51, I will be on the 145.920/435.300 MHz repeater. For FO-29 and VO-52, I will try to start out calling CQ in SSB approximately 10 kHz above the center frequency of these transponders. HO-68 will be in FM until its scheduled shutoff at 1825 UTC, which will be near the predicted LOS time at the hamfest site. If you are able to work these passes and hear me, please feel free to give me a call. The hamfest site is in grid DM41vn. If you work WD9EWK on Saturday, there's no need to send me a QSL card to get my card. Just e-mail me the QSO details, and - if you're in the log - I will gladly send out a QSL card. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

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WD9EWK from DM52/DM53, Friday (30 April)
by Patrick STODDARD (WD9EWK/VA7EWK) 26 Apr '10

26 Apr '10

Hi! On my way (sort of) to the hamfest in Sierra Vista AZ on Saturday (1 May), I will make a detour to the DM52/DM53 grid boundary in Graham County AZ northwest of Safford on Friday (30 April) afternoon. I stopped in this area twice around this time last year, and I don't think anyone else has been on from DM53 since then. I am planning to stop there for the AO-27 passes around 2003 and 2144 UTC Friday, and - depending on the view of the eastern sky - I might attempt the AO-51 pass at 2214 UTC. The 2214 UTC AO-51 pass has a maximum elevation of 5 degrees at that location, so I may only have a few minutes during that pass if I can hear the satellite at all. After these passes, I will move south and stop somewhere in DM52 for the AO-51 pass at 2348 UTC. Depending on how things go on Friday, I could either return to the DM51/DM52 boundary where I stopped a few weeks ago, or possibly head to the Arizona/New Mexico state line (grid DM52lf) where I worked from last October. Since I will be up and on the air from the hamfest in Sierra Vista early Saturday morning, I do not plan on working anything else after these passes on Friday. As always, if you work me on Friday, there's no need to send me a QSL card. Just e-mail me the QSO details, and - if you're in the log - I will gladly send out a QSL card. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

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AO-51 now in dual repeaters, V/U and L/U
by Andrew Glasbrenner 25 Apr '10

25 Apr '10

I just completed the weekly mode change for AO-51 just after 2200Z. We are now running dual repeaters on 145.920/435.300 and 1268.700/435.150. The 67Hz PL access is on for the V/U pair with a 2 minute period. Power output is 410mw for either repeater. AO-51 will be reentering eclipses this week or next, and we will need to frequently interrupt the L/U repeater for telemetry. The modulation will be left low on the repeater to make the switch from data to voice easier. I'll try to do this primarily on the morning passes over the East Coast, but it could happen on any US pass. It's important for us to keep close tabs on the power situation during this period. 73, Drew KO4MA AMSAT-NA VP Operations

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Fwd: Next HV Satcom net
by Stuart Balanger 25 Apr '10

25 Apr '10

---------- Forwarded message ---------- From: Stuart Balanger <wa2bss(a)gmail.com> Date: Sun, Apr 25, 2010 at 2:15 PM Subject: Next HV Satcom net To: amsar-bb(a)amsat.org Hi all, The next "HV Satcom" group net is Thursday april 29, 8PM on the 146.97 Mt. Beacon Repeter (or 2400 UTC), & ther is an Echolink node of N2EYH-L node! More info: www.hvsatcom.org 73,.Stu

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Re: AO 27 ?
by Clint Bradford 25 Apr '10

25 Apr '10

Gould quickly contacted me to re-calibrated my slide rule - I was 1/2 correct earlier - it is almost +/-10kHZ on the 440 side of a 45 degree pass of an FM bird. Here's the actual equation to calculate Doppler shift ... http://tinyurl.com/dopplershift Clint, K6LCS

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AO 27 ?
by Ted 25 Apr '10

25 Apr '10

AMSAT shows downlink at 436.795 AO27 site shows downlink at 436.797 What is the correct frequency?

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Re: AO 27 ?
by Clint Bradford 25 Apr '10

25 Apr '10

On the 440 side during a 45-degree pass, there can be almost a 10kHZ deviation - well, plus or minus about 5kHZ from center - that must be accommodated for the Doppler effect. So either of those two (actually BOTH) could/should be programmed on your receive side, along with a few more to accommodate Doppler. Clint, K6LCS http://www.work-sat.com

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G5500 Rotor Problems
by Angelo Glorioso 25 Apr '10

25 Apr '10

With field day coming around the corner, I took the time to work on my spare G5500 rotor setup. I knew from earlier this year, I had to put my spare azimuth rotor to replace the one that stopped working. I took the Azimuth rotor apart and come to find out that it seems the nylon gear that is attached to the motor itself is slipping big time. I can manually move the other gears and they seem to be working fine. I will take the rest of the rotor apart tomorrow, but I was wondering if anyone else has come across this problem??? Since I am unable to see without taking the rest of the rotor apart, anyone know how this gear is attached to the shaft of the motor?? Anyone have any ideas where I might get another gear if necessary?? I see why Yaesu will only sell the whole motor attachment know for 200.00 plus dollars. 73 de Angelo

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HO-68 Schedule - 25-02 May 2010
by Alan Kung 25 Apr '10

25 Apr '10

25 Apr. 2010 ================================ 17:30...Turn On--FM India, Africa, Middle East, Europe,NA 16:45...Turn Off 19:00...Turn On--FM Africa,Europe,Middle East,NA 19:45...Turn Off 23:25...Turn On--FM NA,North Asia,East Asia,Oceania 24:10...Turn Off 26 Apr. 2010 ================================ 01:21...Turn On--FM North Asia,East Asia,South Asia 01:34...Turn Off 02:10...Turn On--SSTV South America,NA,North Asia 02:55...Turn Off 19:00...Turn On--SSTV Africa,Europe,NA 19:45...Turn Off 27 Apr. 2010 ================================ 00:10...Turn On--FM South America,NA,North Asia 00:55...Turn Off 01:55...Turn On--FM South America,NA,North Asia 02:40...Turn Off 02:47...Turn On--FM North Asia, East Asia, South Asia 03:00...Turn Off 09:15...Turn On--FM Oceania,Asia,Europe 10:00...Turn Off 17:00...Turn On--FM India,Middle East,Europe,NA 17:45...Turn Off 18:45...Turn On--FM Africa,Europe,NA 19:30...Turn Off 28 Apr. 2010 ================================= 02:34...Turn On--FM North Asia,East Asia,South Asia 03:50...Turn Off 10:45...Turn On--FM Oceania,East Asia,North Asia,Europe 11:30...Turn Off 13:25...Turn On--FM NA,South America,Europe 14:10...Turn Off 18:30...Turn On--Packet Africa,Europe,NA 19:15...Turn Off 22:35...Turn On--Packet NA,North Asia,East Asia,Oceania 23:20...Turn Off 29 Apr. 2010 ================================= 02:16...Turn On--FM North Asia,East Asia,South Asia 02:32...Turn Off 05:50...Turn On--FM NA,North Asia,Middle East, Europe,Africa 06:35...Turn Off 10:30...Turn On--FM Oceania,Asia,Europe,NA 11:15...Turn Off 16:25...Turn On--Packet Africa,India,Middle East,Europe,NA 17:10...Turn Off 18:15...Turn On--Packet Africa,Europe,NA 19:00...Turn Off 30 Apr. 2010 ================================ 00:05...Turn On--Packet South America,NA,North Asia 00:50...Turn Off 02:00...Turn On--FM North Asia,East Asia,South Asia 02:16...Turn Off 10:15...Turn On--FM Oceania,Asia,Europe 11:00...Turn Off 17:55...Turn On--SSTV India,Africa,Europe,NA 18:50...Turn Off 22:00...Turn On--FM NA,North Asia,Oceania 22:45...Turn Off 01 May 2010 ================================ 00:50...Turn On--Packet South America,NA,North Asia 01:30...Turn Off 01:39...Turn On--FM North Asia,East Asia,South Asia 01:54...Turn Off 10:00...Turn On--FM Oceania,Asia,Europe,NA 10:45...Turn Off 17:40...Turn On--FM Africa,Europe,NA 18:25...Turn Off 02 Apr. 2010 ================================ 00:30...Turn On--FM South America,NA,North Asia 01:15...Turn Off 03:16...Turn On--FM North Asia,East Asia,South Asia 03:28...Turn Off 06:45...Turn On--FM North Asia,Europe,Africa 07:30...Turn Off 09:40...Turn On--FM Oceania,Asia,Europe 10:25...Turn Off 73 Alan Kung, BA1DU HO-68(XW-1) Project Manager www.camsat.cn

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Re: SO-67
by Tony Langdon 24 Apr '10

24 Apr '10

At 05:44 AM 4/25/2010, Vincenzo Mone wrote: >Hello to all, >right a few seconds ago I had a good pass of SO-67 >but unfortunately I did not hear nothing on >the frequency of 435.345 on FM mode. >Please I would like to know if it is alive or not. >Can I hear something? SO-67 is in commissioning, and is currently not available. 73 de VK3JED / VK3IRL http://vkradio.com

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