January 2008 - AMSAT-BB - mailman.amsat.org

Re: [PNWVHFS] 1.2ghz antenna location
by Edward Cole 14 Jan '08

14 Jan '08

Writing this late at night....I wrote it backwards. Obviously the 1.2G yagi will be inside the aperture of the HF quad, so try to keep the 1.2G yagi away from the quad and dish by the stacking distance of the 1.2G yagi to least impact its performance. The quad probably will not mind the presence of the yagi much. The 3-foot dish is a bigger item. sorry, Ed - KL7UW At 11:28 PM 1/13/2008, Edward Cole wrote: >When stacking antennas within the aperture of another then one >should try to keep the lower frequency antenna out of the aperture >of the higher frequency antenna. Use the stacking dimension of the >1.2 G antenna as minimum spacing. If you do not know what that is >then use half the boom length as min spacing. I would use that also >to keep the dish from affecting the pattern of the 1.2G antenna. > >Another goal is to try not to place booms parallel to a member of >the lower freq. antenna as this may cause coupling and distortion or >detuning of the lower freq. antenna. This would indicate that you >should mount the 1.2G yagi pointing in the same direction as that >places the boom perpendicular to the quad loops. > >I think there is some info on stacking VHF antennas on the Directive >Systems website. >73 Ed - KL7UW > >At 10:51 PM 1/13/2008, w7lrd(a)comcast.net wrote: >>Hello >>I will be mounting my 22 el 1.2Ghz yagi "inside" my HF 20,15, &10 >>meter quad. Has anyone tried something like this or even >>similar? If I mount it up near the top of the mast is might be >>faily close to my 10M driven loop. I also am considering mounting >>it 90 degrees to the quad boom and just figure that in whe aiming >>the short yagi. So what would be the closest I want the yagi to be >>to any of the HF wires? Part of the space inside the quad is taken >>up by a 3 foot primestar dish for 2.4 Ghz. So the antenna >>placement "up there " is getting a bit crowded. I want to try not >>to degrade 1.2 or my HF suff. The height will be about 50 feet. >>As Always- Thanks >> >>-- >>73 Bob W7LRD >>"Somewhere, something incredible is waiting to be known" >>Carl Sagan >> >>--~--~---------~--~----~------------~-------~--~----~ >>~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 >>-~----------~----~----~----~------~----~------~--~--- > >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 >====================================== 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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Re: [PNWVHFS] 1.2ghz antenna location
by Edward Cole 14 Jan '08

14 Jan '08

When stacking antennas within the aperture of another then one should try to keep the lower frequency antenna out of the aperture of the higher frequency antenna. Use the stacking dimension of the 1.2 G antenna as minimum spacing. If you do not know what that is then use half the boom length as min spacing. I would use that also to keep the dish from affecting the pattern of the 1.2G antenna. Another goal is to try not to place booms parallel to a member of the lower freq. antenna as this may cause coupling and distortion or detuning of the lower freq. antenna. This would indicate that you should mount the 1.2G yagi pointing in the same direction as that places the boom perpendicular to the quad loops. I think there is some info on stacking VHF antennas on the Directive Systems website. 73 Ed - KL7UW At 10:51 PM 1/13/2008, w7lrd(a)comcast.net wrote: >Hello >I will be mounting my 22 el 1.2Ghz yagi "inside" my HF 20,15, &10 >meter quad. Has anyone tried something like this or even >similar? If I mount it up near the top of the mast is might be >faily close to my 10M driven loop. I also am considering mounting >it 90 degrees to the quad boom and just figure that in whe aiming >the short yagi. So what would be the closest I want the yagi to be >to any of the HF wires? Part of the space inside the quad is taken >up by a 3 foot primestar dish for 2.4 Ghz. So the antenna placement >"up there " is getting a bit crowded. I want to try not to degrade >1.2 or my HF suff. The height will be about 50 feet. >As Always- Thanks > >-- >73 Bob W7LRD >"Somewhere, something incredible is waiting to be known" >Carl Sagan > >--~--~---------~--~----~------------~-------~--~----~ >~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 >-~----------~----~----~----~------~----~------~--~--- 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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High of Satellite to be in sunlight
by Chris Bloy 14 Jan '08

14 Jan '08

Hi all, Strange question, I guess partly related to wanting to work AO-7 later this year. How do you know, or calculate whether a satellite is in sunlight even if the prediction programs shows it to be out of sunlight on the map?. I.e. will the satellite be illuminated even though the earth in the coverage area is not? I hope that makes sense?! Also, I have been trying to look in the archive and work out exactly when AO-7 will be in what mode during the passes over my QTH.. I try and use the Planet Emily site and Oscar.dcarr.org, but it appears to be mainly in mode A more then B? Finally, has anyone heard the beacon from her recently? Many thanks, Chris M0DQO IO90KU - UK No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.2/1221 - Release Date: 12/01/2008 14:04

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Mak SV1BSX
by k3szh＠netzero.net 14 Jan '08

14 Jan '08

Hello Mak Congratulation on your 1000 contact/qso's on AO7.This old satellite sure keeps our enthusiasm and spirits up.Well done Mak. PS. I sure miss the AO7 chat room 73 and best regards from a old friend JOe K3SZH Amsat 3788 since 1976 _____________________________________________________________ Click here to save cash and find low rates on auto loans. http://thirdpartyoffers.netzero.net/TGL2221/fc/Ioyw6i4uZMY5onKmxKHQWSTmPXiZ…

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AO-7 1000. SV1BSK.
by TERRY BROMLEY 13 Jan '08

13 Jan '08

Hi Mak, congratulation's in reaching the 1000 in the log. 73, Terry G1WPR.

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Sat Panel version 2
by Andrew Rich 13 Jan '08

13 Jan '08

I have for some time wanted to make an indicator panel style of display to tell me what the status of several satellites was. I have now completed this task. A perl script watches over the world wide satellite data and sets some flags in mysql. A cgi web page then displays the status. Enjoy http://vk4tec.no-ip.org/cgi-bin/sat_panel_v2.cgi Andrew Rich VK4TEC

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ANS-013 New Feature -ANS Bulletins Via AMSAT-BB
by JoAnne Maenpaa 13 Jan '08

13 Jan '08

As of the first of the year the weekly AMSAT News Service Bulletins will also be sent via the amsat-bb list to ensure maximum news coverage. (-editor) AMSAT NEWS SERVICE ANS-013 ANS is a free, weekly, news and information service of AMSAT North America, The Radio Amateur Satellite Corporation. ANS reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites. Please send any amateur satellite news or reports to: ans-editor(a)amsat.org In this edition: * AO-51 Report * Florida AMSAT Net Will Host W2GPS This Thursday * SW Conference * AMSAT Engineering Team Meets * Satellite Shorts From All Over * ARISS Status - 07 January 2008 SB SAT @ AMSAT $ANS-013.01 AO-51 Report AMSAT News Service Bulletin 013.01 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.01 The period of no eclipse for AO-51 is about a week old. The no eclipse period has proven to exhibit many short periods when the bad sun angle has caused the solar cells not to supply sufficient power, this has been supplemented by the batteries. We have increased the power output significantly over the last week, TXA (L/U digital BB) is now running 630 mW and TXB (analog V/U repeater) is running 820 mW. We plan on experimenting with the S-Band trans- mitter and a U-Band transmitter during the next couple of weeks. We do not have a published schedule as we are adapting the outputs to optimize the satellite operation and decrease the temperatures. Updated Note:1/13/2007-- AO-51 stopped transmitting and is going to be re-booted ASAP. Keep an "ear" on it. [ANS thanks Gould, WA4SXM and the AO-51 Command team for the above information] /EX SB SAT @ AMSAT $ANS-013.02 Florida AMSAT Net Will Host W2GPS This Thursday AMSAT News Service Bulletin 013.02 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.02 AMSAT President, Rick Hambly, W2GPS will join the Florida AMSAT Net, Thursday Jan 17, 2008 from 7:30 - 8:30 pm EST to give a short status report and field questions. This net links repeaters all over Florida and via EchoLink so there is ample opportunity for those that want to listen or ask questions. The EchoLink nodes to connect through are: KG4YZY-R or N4HHA-R. Please try to connect to KG4YZY-R first via Echolink. If you are connecting via another repeater, please make certain that none of your repeater's IDs, squelch tails, etc are sent over the link, otherwise it gets real messy. The net's purpose is to provide a platform for hams with amateur satellite interest to meet and discuss topics of interest. All amateurs are invited to check in. Expect other AMSAT Officers and Board members to participate over the next few months. /EX SB SAT @ AMSAT $ANS-013.03 SW Conference AMSAT News Service Bulletin 013.03 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.03 A conference on global shortwave coordination will be held February in Kuala Lumpur. This, to try to resolve potential interference problems likely to affect shortwave transmissions. According to the Asia-Pacific Broadcasting Union, the February meeting will be hosted by VT Communications on behalf of the High Frequency Coordination Conference, the Arab States Broadcasting Union and the Asian Broadcasting Union. Using mutual coordination, delegates will try to resolve many of the potential interference problems that are likely to affect shortwave transmissions in the 2008 joint global broadcasting schedule. At present, a single global seasonal database of seasonal frequency requirements, compiled by the High Frequency Coordination Conference secretariat, assists in the coordination process. A new database of frequency requirements for the shortwave radio broadcasting season from March 30th to October 26th will be on the agenda of the conference. Hams will want to keep an eye on the outcome of this gathering because whatever is decided could impact on Amateur Radio operations in spectrum that shared with international shortwave. (Southgate) [ANS thanks ARNS for the above information] /EX SB SAT @ AMSAT $ANS-013.04 AMSAT Engineering Team Meets AMSAT News Service Bulletin 013.04 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.04 With the holiday season behind and everyone settling back into winter in the northern hemisphere, the AMSAT Engineering Team kicked off the new year with the first meeting of 2008 on Tuesday, January 8. Thirty-two radio amateurs met via a VoIP teleconference call to get down to work on AMSAT's main missions which include the Eagle Satellite, the geosynchronous Phase IV Lite rideshare opportunity with Intelsat, and educational support for university projects. Engineering project manager Barry Baines, WD4ASW moderated the meeting along with AMSAT's Vice President of Engineering, Bob McGwier, N4HY. AMSAT's volunteer engineers provided status and planning information for the projects listed below. Barry, Bob and engineering team members will provide members with detailed project information in future columns of the AMSAT Journal. Rick Hambly, W2GPS, AMSAT President, reported that negotiations are continuing with Intelsat and are now going to focus on size, weight, and cost of the geosynchronous rideshare arrangement. Rick reminded everyone that our mission must excite potential grant funding sources via our unique emergency communication and educational capabilities. Watch the Journal for future details! Matt Ettus, N2MJI has taken on the design of the Advanced Communication Payload. The first steps toward specification of the high speed digital channels, power requirements, uplink and downlink protocols, and class of stations supported have begun. Watch the Journal for future details! Howard Long, G6LVB continues work on the linear transponders based on Software Defined Radio (SDR) technology. Development and testing are underway. High altitude balloon, SuitSat2 and SSETI missions are planning to utilize this transponder technology to provide early experience prior to P3E and Eagle utilization. Watch the Journal for future details! Marc Franco, N2UO has started work on the VHF amplifier driver stage using the silicon carbide technology enabling the 86% efficiency of the main PA. Space rated components are under study. The 2 meter band HELAPS amplifier will be the initial design and possible scaling upward to the 70cm band is under consideration. Watch the Journal for future details! Lou McFadin, W5DID leads the team developing SuitSat-2. The internal housekeeping unit (IHU) and AMSAT's software defined transponder technology are the main items under development. Solar cells have been donated by NASA. A new antenna system on top of the helmet has been completed. Watch the Journal for future details! Bob Davis, KF4KSS, AMSAT Lab Manager reported on several good projects that have arisen out of the cooperative efforts of AMSAT and the HAWK Institute of Space Sciences at the University of Maryland, Eastern Shore. Construction of the AMSAT lab in the 8500 square foot facility continues. The clean room and machine shop will be coming on line to begin the development of the Eagle satellite space frame. University students will utilize the facilities to develop and launch a high altitude balloon project and a university cubesat both carrying research-related and AMSAT-related payloads. Watch the Journal for future details! If you want to help with the AMSAT Engineering Team, send an e-mail to Bob N4HY via n4hy(a)amsat.org. [ANS thanks, Bob, N4HY, for the above information] /EX SB SAT @ AMSAT $ANS-013.05 Satellite Shorts From All Over AMSAT News Service Bulletin 013.05 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.05 + Clint Bradford, K6LCS reports success from his Wednesday, January 9 AO-51 club demonstration. "AO-51 performed tremendously! We worked Mexico and a couple California stations", said Clint. + Ed Long, WA4SWJ, Editor, The AMSAT Journal reminds authors that the dead-line is approaching for article submissions for the Jan/Feb 08 Journal. If you have an article to submit Ed would love to have it as soon as possible. + AMSAT Store Manager, Bruce, KK5DO suggests you check out the new 2GB USB Flash Drive in an aluminum finish with the AMSAT logo in the store. Bruce says, "This has to be one of the best items we have carried. Something that all of us can use." + The current launch date for the PSLV-C9, carrying the NLS-4 set of nanosatellites (CanX-2, Delfi-C3, AAUSat-II, COMPASS-1,Cute-1.7+APDII, SEEDS) is February 14. + Reserve your seat! For his next big plan for the private space industry, Richard Branson is thinking up new ways to excite affluent space tourists: flying them into the biggest lightshow on Earth, the Aurora Borealis. Although the New Mexico Virgin Galactic Spaceport isn't scheduled for completion until 2010, the British entrepreneur is already planning his next project intended for cruises into the spectacular space phenomenon from an Arctic launchpad. (Universe Today) + Amateur radio to the moon? Possible rideshare arrangements to the moon via ESA and NASA student projects are discussed in the November/ December 2007 AMSAT Journal. Not a member? Didn't get the Journal? Sign up for membership today at http://www.amsat.org! [ANS thanks everyone for the above information] /EX SB SAT @ AMSAT $ANS-013.05 ARISS Status - 07 January 2008 AMSAT News Service Bulletin 013.06 >From AMSAT HQ SILVER SPRING, MD. January 13, 2008 To All RADIO AMATEURS BID: $ANS-013.06 1. ARISS School Contacts Status Due to ISS crew schedules, no Amateur Radio on the International Space Station (ARISS) contacts are planned at this time. The ARISS team expects contacts to resume once STS-122 launches in late January. 2. Astronaut Training Status Timothy Creamer, KC5WKI, is scheduled for a training session in basic radio operations and school contacts on Tuesday, January 8. Creamer is a backup crew member for the Expedition 18 mission. 3. ARISS Annual Report The Amateur Radio on the International Space Station (ARISS) FY2007 annual report has been written and is being finalized. It will soon be posted on the ARISS section of the AMSAT Web site. [ANS thanks Carol, KB3LKI, for the above information] /EX In addition to regular membership, AMSAT offers membership in the President's Club. Members of the President's Club, as sustaining donors to AMSAT Project Funds, will be eligible to receive additional benefits. Application forms are available from the AMSAT Office. 73, This week's ANS Editor, Dee Interdonato, NB2F nb2f at amsat dot org

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Rich Hambly to talk with AMSAT members on FL AMSAT net
by Gould Smith 13 Jan '08

13 Jan '08

AMSAT President, Rick Hambly, W2GPS will join the Florida AMSAT Net, Thursday Jan 17, 2008 from 7:30 - 8:30 pm EST to give a short status report and field questions. This net links repeaters all over Florida and via EchoLink so there is ample opportunity for those that want to listen or ask questions. The EchoLink nodes to connect through are: KG4YZY-R or N4HHA-R. The net's purpose is to provide a platform for hams with amateur satellite interest to meet and discuss topics of interest. All amateurs are invited to check in. Expect other AMSAT Officers and Board members to participate over the next few months. 73, Gould, WA4SXM

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Re: AMSAT-BB Digest, Vol 3, Issue 20
by Kevin Forbes 13 Jan '08

13 Jan '08

Hello folks, there is a new website online. Mainly amateur radio, some free software is also available. Again, mostly related to amateur radio. Calculators and spacecraft imaging software. http://www.vk3ukf.com/ All the best, Kevin, VK3UKF. _________________________________________________________________ Your Future Starts Here. Dream it? Then be it! Find it at www.seek.com.au http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau%2…

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Florida AMSAT Net Will Host W2GPS This Thursday
by JoAnne Maenpaa 13 Jan '08

13 Jan '08

AMSAT President, Rick Hambly, W2GPS will join the Florida AMSAT Net, Thursday Jan 17, 2008 from 7:30 - 8:30 pm EST to give a short status report and field questions. This net links repeaters all over Florida and via EchoLink so there is ample opportunity for those that want to listen or ask questions. The EchoLink nodes to connect through are: KG4YZY-R or N4HHA-R. The net's purpose is to provide a platform for hams with amateur satellite interest to meet and discuss topics of interest. All amateurs are invited to check in. Expect other AMSAT Officers and Board members to participate over the next few months. -- 73 de JoAnne K9JKM k9jkm(a)amsat.org

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