July 2009 - AMSAT-BB - mailman.amsat.org

Re: IF you had a choice...
by Sebastian 16 Jul '09

16 Jul '09

On Jul 16, 2009, at 12:32 PM, David - KG4ZLB wrote: > Hi Norman, > > This is a topic that surfaces every so often and is not an easy one to > answer. > > The reason I say "primarily" is that the TS exhibits a "birdie" > right in > the downlink frequency for SO-50 which renders use of that bird more > or > less impossible on that radio. Add AO-27 to that list! Also, and this is something that I will never understand why they failed to do this; the 2000 can't send 12 volts up the coax line for preamps, the 910H can. While there are other methods of supplying voltage to preamps, it's nice to have it built in. 73 de W4AS Sebastian

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[amsat-bb] K5E UPDATE – 16 July, 2009 – 16:45 UTC
by n3tl＠bellsouth.net 16 Jul '09

16 Jul '09

UPDATE – 16 July, 2009 – 16:45 UTC The K5E special event operation is off to a good start, with contacts in the log on four different amateur satellites – AO-7, FO-29, SO-50 and VO-52. OTHER OPERATORS In an attempt to cover as much of North America as possible, three operators have volunteered to assist in the K5E Satellite Special Event. They will ID, per information I received from ARRL, as: AA5PK/K5E K8YSE/K5E WA4NVM/K5E Contacts with these stations are valid to claim a Special Event QSL. Please send ALL requests for QSL to N3TL, and please include an SASE. Operating Schedules: Here are the operating schedules for these stations. I will post updates as necessary: AA5PK/K5E will operate the following 10 passes (times noted are mid-pass for his location): 2009-07-17 01:03:08 ECHO (AO-51) 2009-07-17 02:27:24 OSCAR 7 (AO-7) 2009-07-18 01:27:23 OSCAR 7 (AO-7) 2009-07-18 02:03:03 ECHO (AO-51) 2009-07-18 22:24:59 EYESAT-1 (AO-27) 2009-07-19 01:23:22 ECHO (AO-51) 2009-07-19 02:20:31 OSCAR 7 (AO-7) 2009-07-19 16:41:05 JAS-2 (FO-29) 2009-07-19 21:56:23 EYESAT-1 (AO-27) 2009-07-20 00:43:51 ECHO (AO-51) On the passes above, AA5PK/K5E will be the ONLY K5E Special Event Station. K8YSE/K5E will operate from the morning of July 21st through 0359 UTC on July 22nd as the ONLY K5E Special Event Station active. WA4NVM/K5E Will operate form the morning of July 22nd through 0359 UTC on July 23rd as the ONLY K5E Special Event Station active. NOTE TO ALL: Only 1 QSL card will be issued per valid amateur call sign. Multiple contacts on the SSB/CW satellites (AO-7, FO-29 and VO-52) shouldn’t be a big deal because those satellites aren’t too busy – but the 1 QSL per call rule still applies. Especially on the FM satellites (AO-27, AO-51 and SO-50), please only one contact (all three satellites combined, not per satellite). This will enable the K5E and /K5E stations to work as many as possible. Thank you! I will post additional updates as warranted, and also will update www.qrz.com/k5e. Please see that Web page for full details on the special event. 73 to all, Tim – N3TL K5E – The 40th Anniversary Apollo 11 Satellite Special Event

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Ant in QST
by Jerry Clement 16 Jul '09

16 Jul '09

Has anyone seen the antenna for 2m in this monthsQST p. 30. Its a omnidirection sorta a double diamond turnstile. I was wondering how this woould work for the LEO Sats?? Would think it would be simple to scale it down for 435?? -- Jerry - NR5A - South Dakota http://nr5abikeblog.blogspot.com/ http://nr5abeaconblog.blogspot.com/ _______________________________________________ Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb I have used the Quadrifilar Helix Antenna on Satellites with great success, as suggested by David GOMRF. My antenna is here: www.stormchaser.cjb.net with a link for the plans. Jerry VE6AB www.ve6ab.blogspot.com

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Re: Ant in QST
by G0MRF＠aol.com 16 Jul '09

16 Jul '09

In a message dated 15/07/2009 21:52:06 GMT Standard Time, nr5ajerry(a)gmail.com writes: Has anyone seen the antenna for 2m in this monthsQST p. 30. Its a omnidirection sorta a double diamond turnstile. I was wondering how this woould work for the LEO Sats?? Would think it would be simple to scale it down for 435?? I did see that, but it has very low angle radiation probably with a deep null at higher angles. It's advantage was that it has horizontal polarisation. I can't help but feel a quadrifilar helix would be better There are some designs out there and there is also an online calculator for the dimensions for a frequency of your choice. David G0MRF

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Ant in QST
by Jerry Felts 16 Jul '09

16 Jul '09

Has anyone seen the antenna for 2m in this monthsQST p. 30. Its a omnidirection sorta a double diamond turnstile. I was wondering how this woould work for the LEO Sats?? Would think it would be simple to scale it down for 435?? -- Jerry - NR5A - South Dakota http://nr5abikeblog.blogspot.com/ http://nr5abeaconblog.blogspot.com/

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Polarity switching question
by w6zkh＠comcast.net 15 Jul '09

15 Jul '09

I recently obtained a pair of KLM yagi's for satellite work. They both have the KLM polarity switching box mounted and wired up. Since I havent put them up yet, and not well versed in the subject, I got out my ohm meter just to see what was what on this item. I noticed that both driven elements have continuty to the center pin of the coax at the same time. I was under the impression that the relay switched back and forth the driven elements to give either RH or LH polarity. I havent applied the 12 volts to the box yet to check that out, but was just curious. One thing I have noticed while using the downlink yagi is that I get very little fade due to polarity when I turn the antenna. I hope that is a good thing?? I havent checked the uplink yagi to see if it has the same results. I hope someone can enlighten me abit. 73 de John W6ZKH

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New Computor
by TERRY BROMLEY 15 Jul '09

15 Jul '09

Just replaced my old broken computor, but all my email address are lost. So please if i use your mail boxes a lot ( you know who you are hi) please email me so i can put your email ad in address file. Tnx Terry G1WPR.

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Solar Eclipse 22nd July
by Masahiro Arai 15 Jul '09

15 Jul '09

Solar eclipse is visible at Asia and Pacific on 22nd July. Very limited area is able to see total solar eclipse. Many amateur satellites pass above the solar eclipse area. Electric power generated by solar cells will show very interesting behavior under solar eclipse. How about collecting telemetry and ploting solar cell power condition? Temperature may also show interesting look. I checked the telemetry transmitting satellite orbit around Japan. The following satellites pass above solar eclipse area. COMPASS-1, FO-29, CO-66, CO-58, DO-64, STARS, PRISM, SOHLA-1, AO-27, NO-44 There is something to be said for DO-64 condition. Will DO-64 stop transmitting telemetry under the solar eclipse? If AO-27 store telemetry as WOD, WOD shows complete solar eclipse condition. Let's try to collect telemtry under solar eclipse! solar eclipse info http://eclipse.gsfc.nasa.gov/SEmono/TSE2009/TSE2009.html Masa JN1GKZ Tokyo Japan

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CubeSAT and InnoSAT
by Trevor . 15 Jul '09

15 Jul '09

Is there any word on CubeSAT and InnoSAT which launched on Falcon-1 early this morning ? http://www.southgatearc.org/news/july2009/falcon1_satellite_launches.htm 73 Trevor M5AKA

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Re: Falcon-1 Launch - webcast ?
by Trevor . 14 Jul '09

14 Jul '09

--- On Tue, 14/7/09, Alexandru Csete <alexc(a)phys.au.dk> wrote: > Webcast of SpaceX launches are usually available on their webstite Hi Alex, Thanks for the YouTube link. For some reason my email took a long time, > 12 hours, to get through the AMSAT-BB and there's an email from early this morning that hasn't come through yet - the web is probably on a go-slow. Anyway I found the live webcast in time. --- On Tue, 14/7/09, Andrew Glasbrenner <glasbrenner(a)mindspring.com> wrote: > system, and that bumped the two nanosats off the flight. A shame they got bumped, still the good news is that the Falcon 1 got into orbit successfully. Lets hope SpaceX have similar success with the Geo-Transfer orbit capable Falcon 9. 73 Trevor M5AKA

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