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

Re: [Bod] Ron Bracewell, SK
by AMSAT Director of Education 16 Aug '07

16 Aug '07

Tom Clark, K3IO wrote: > Many of you know of Ron Bracewell, the Australian Radio Astronomer. I > have just learned of his passing at age 86 For those of you who may not be subscribed to The SETI League press email list: my remembrance of Ron is posted to <http://www.setileague.org/admin/bracewel.htm>. 73, Paul -- Dr. H. Paul Shuch, N6TX AMSAT Director of Education n6tx(a)amsat.org www.qsl.net/n6tx Grid Square FN11lh

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Re: [Senior-officers] Ron Bracewell, SK
by Robert McGwier 16 Aug '07

16 Aug '07

This is very sad indeed. I met Bracewell and talked to him several times. When Maureen Quirk figured out she could not get some FFT stuff through my thick head, she gave me Bracewell's book and it opened up the world to me. I had never heard of a Hartley transform or a cosine transform and I had great new toys to work with. I made it a point to get acquainted with him after this and thank him. You can bet that almost everyone who has ever worked on the MPEG video compression techniques learned most of the Discrete Cosine Transform theory from Bracewell. RIP Bob Tom Clark, K3IO wrote: > Many of you know of Ron Bracewell, the Australian Radio Astronomer. I > have just learned of his passing at age 86; details can be read at > http://news-service.stanford.edu/pr/2007/pr-bracewell-082207.html. Ron's > profession credentials at Stanford are summarized on his personal web > page at http://www-star.stanford.edu/people/bracewell.html > > I met Ron as a young radio astronomer in the early 1960's, shortly after > he came to the US. He taught me about the beauty of the Fourier > Transform, and I have been forever in his debt since that first > encounter.Many of you have heard me refer to his McGraw-Hill textbook, > "/The Fourier Transform and its Applications/" (ISBN-13:978-0070070158, > see this entry on Amazon.com > <http://www.amazon.com/Fourier-Transform-Its-Applications/dp/0070070156>)as > THE bible to be learned and revered by anyone thinking about topics like > antenna arrays, image processing, holography, XRAY & MRI tomography, and > ... that share the Fourier Transform as their foundation. > > Ron also was active in philosophical discussions about SETI (see, for > example http://www.daviddarling.info/encyclopedia/B/BracewellR.html); be > sure to read his 1975 book /The Galactic Club/. > > Rest well, Ron. Your genius profoundly affected many lives! > > Tom Clark > // > -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair "If you're going to be crazy, you have to get paid for it or else you're going to be locked up." Hunter S. Thompson

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FO-29 sked 16-27 Aug
by Mineo Wakita 16 Aug '07

16 Aug '07

FO-29 operation sked #3 16-27 Aug 2007 UTC 16 Aug 2:40- 4:25- 6:10- 17 Aug 3:30- 5:15- 18 Aug 2:35- 4:20- 6:05- 19 Aug 3:23- 5:10- 20 Aug 2:33- 4:13- 6:00- 21 Aug 3:20- 5:03- 22 Aug 2:27- 4:10- 5:55- 23 Aug 3:15- 5:00- 27 Aug 3:05- 4:50- de JE9PEL, Mineo Wakita

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report on FO-29
by Bruce Robertson 16 Aug '07

16 Aug '07

Thank you for all the hard work you put into making FO-29 work again. This evening (2007-08-16), I listened to its beacon. Though I wasn't able to decode or record it, I can report that from my location on the east coast of Canada, it was audible well past the point when SatPC32 believed the bird was in eclipse (roughly 6:51Z). I believe I could hear the beacon down to LOS, which was 6:55Z. 73, Bruce VE9QRP

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Re: [TowerTalk] Rohn 45G question
by TexasRF＠aol.com 15 Aug '07

15 Aug '07

I can help with this question: Glen Martin no longer offers a thrust bearing. They are suggesting use of a Yaesu GS065 as a substitute. The 45AG4 and BPL45G both have a 3" i.d. hole where the bearing mounts. Neither the old Glen Martn bearing or the GS065 will properly cover a hole this size and you would also have to drill new mounting holes. The Rohn TB3 and TB4 fit without any modifications. The azimuth rotor part of a Yaesu G5500 will fit the AS455G rotor plate without modifications. You will need a Yaesu separation kit to mount the elevation part of the G5500 to a mast above the top of the tower. If you have any questions about any of this please call me at 800 272 3467. 73, Gerald Williamson K5GW Texas Towers In a message dated 8/14/2007 9:50:57 P.M. Central Daylight Time, n4qwf1(a)gmail.com writes: Look at this page and you can get there number. This is one of the best companies I have ever dealt with. My experience with them was outstanding. They will surely answer your questions and help you with whatever they can. Wish I felt the same about most other companies I have dealt with. Go for it. 73's << John http://www.glenmartin.com/techsupport.html On 8/14/07, Stargate <stargatesg1(a)verizon.net> wrote: > Hi all, > Does anyone know if a Glen Martin thrust bearing will fit a BPL45G > or 45AG4 top section without having to re-drill it? > > Also, will a AS455G accessory shelf fit a Yaesu G-5500 rotor without > re-drilling? > > Thanks, > RoD > KD0XX > > A good friend will come and bail you out of jail, > A TRUE friend will be sitting next to you saying..... > > > "DAMN THAT WAS FUN" > > _______________________________________________ > 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 > -- N4QWF Amateur Radio Operator AO-7,AO-27,SO-50,AO-51,VO-52 Internet N4QWF(a)AMSAT.ORG Formerly KC4AHW VK3FEZ Amsat Member #27845 DXCC #33,478 VUCC SAT #135 WAS SAT #296 51 on 51 #13 LON -79.25 LAT 37.45 Grid FM07 >From the Foothills of the Blueridge *Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming - "WOW, What a ride!" _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk(a)contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour

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Re: FO-29 sked 14-19 Aug
by Mineo Wakita 15 Aug '07

15 Aug '07

Hello Andrew, I will send your message to JARL command station. de JE9PEL, Mineo Wakita

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FW: [PNWVHFS] 30-Foot aluminum-mesh dish and mount still available (free) in Bremerton, WA
by w7lrd＠comcast.net 15 Aug '07

15 Aug '07

eme anyone! -------------- Forwarded Message: -------------- From: "Randy" <retired(a)easystreet.com> To: <PNWVHFS(a)googlegroups.com> Subject: [PNWVHFS] 30-Foot aluminum-mesh dish and mount still available (free) in Bremerton, WA Date: Wed, 15 Aug 2007 03:53:28 +0000 The family of Jack Riggs, N7AM (SK) is still looking for a good home for Jack's 30-foot aluminum-mesh dish. Since I originally posted the info last April there has been some interest but no takers as yet. They have someone nearby who has offered to take it down for its salvage value (there is a lot of aluminum up there!) but would rather it went to a ham that could actually use it. If no one takes it soon it will have to go for scrap. If you are interested, please contact Jack's son-in-law, Ben Pedersen at (360) 377-2259 to discuss and make arrangements. Please do not email me, call Ben directly. There is a set of pictures of it in the photo gallery at: http://www.kkn.net/~tree/gallery/n7am It uses a prop-pitch motor for azimuth rotation and a hydraulic system for elevation. These components would be included with the antenna and mount but there is no tracking electronics/computer/software available with it. Thanks. Randy, W7HR --~--~---------~--~----~------------~-------~--~----~ ~The Voice of the Pacific NorthWest VHF Society~ You received this message because you are subscribed to the Google Groups "PNWVHFS" group. To post to this group, send email to PNWVHFS(a)googlegroups.com To unsubscribe from this group, send email to PNWVHFS-unsubscribe(a)googlegroups.com For more options, visit this group at http://groups.google.com/group/PNWVHFS -~----------~----~----~----~------~----~------~--~---

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Rohn 45G question
by Stargate 15 Aug '07

15 Aug '07

Hi all, Does anyone know if a Glen Martin thrust bearing will fit a BPL45G or 45AG4 top section without having to re-drill it? Also, will a AS455G accessory shelf fit a Yaesu G-5500 rotor without re-drilling? Thanks, RoD KD0XX A good friend will come and bail you out of jail, A TRUE friend will be sitting next to you saying..... "DAMN THAT WAS FUN"

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Yaesu 5500 rotor problem
by Jeff Griffin 14 Aug '07

14 Aug '07

Well I finally recovered enough from my shoulder operation to take down my 5500 rotor. I took it apart and the three wires going to the pot seem ok, bummer. I also checked the cables as best I could and they seem ok. Is it possible the azimuth rotor indicater pot is bad? If so how do I check it? 73 Jeff kb2m >

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Re: FO-29 sked 14-19 Aug
by Mika Siira 14 Aug '07

14 Aug '07

>----Alkuperäinen viesti---- >Lähettäjä: m-arai(a)a.email.ne.jp >Päivämäärä: 13.08.2007 8:50 >Vastaanottaja: <amsat-bb(a)amsat.org> >Aihe: [amsat-bb] FO-29 sked 14-19 Aug > > >Here is tentative FO-29 operation sked from JARL command station. > > from to > 14 Aug 0245z eclipse (0322z +??) > 0426z eclipse (0509z +??) > 0615z eclipse (0655z +??) Hello, I monitored/worked two passes over north Europe starting 4:43z and 6: 27z. Great signal levels, the bird works just fine!! Thanks to guys at JARL command station for bringing this great satellite back alive! Mika, OH8MBN

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