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

Re: Horizontal stacking distance question
by Edward R. Cole 16 Dec '10

16 Dec '10

At 11:21 AM 12/16/2010, John Geiger wrote: >I know that when stacking antennas for different bands on the same mast, the >general rule of thumb is to space them at least 1/2 of the boom length for >the higher frequency antenna. Does this rule also hold true for stacking 2 >antennas on a horizontal crossboom? If I want to put a 2m and 70cm yagi on >the same crossboom, how far apart should they be spaced? > >73s John AA5JG John, For satellite use that is fine. I have my 2m and 70cm yagis separated 5-feet horizontally. The current setup (before high winds busted the mast) was with my 436CP42 mounted on a 4-foot vertical boom with 1268 loop yagi. The 70cm antenna is 18-foot long and loop yagi 12-foot long. This boom was mounted at right angles to the 5-foot elevation cross boom with a 8-element 2m yagi (vertical pol) at the other end of the cross boom. Not exactly conforming to the half-length rule. Normally, If you are stacking linear-pol antennas the stacking distance in the plane of polarization needs to be further apart than if stacked in the direction right angles to polarization (e.g. two horz pol antennas stacked horizontally need more separation to avoid interaction, whereas, it they are vertical pol antennas stacked horizontal you can stack them closer than the rule. If they are circular pol stacking there is no difference what direction stacking is done. 4 to 5 foot separation on the elevation cross-boom of a B5400 az-el is common for satellite. 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw, 432-100w*, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubususa(a)hotmail.com ====================================== *temp not in service

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Re: AO-7 Scheduling page
by Bob- W7LRD 16 Dec '10

16 Dec '10

You're right Scott. I never checked that link out. What I have done in the past is either "float" a post on the AMSAT bb or try to track down the email address of the person I am trying to contact via AO-7. Some satellite contacts do require advance notice, especially when the footprint time is in seconds. I'm still trying to work JA. So any JA's reading this check out AO-7 mode A to CN87. 73 Bob W7LRD ----- Original Message ----- From: "Scott Armstrong" <aa5am(a)arrl.net> To: amsat-bb(a)amsat.org Sent: Thursday, December 16, 2010 12:02:31 PM Subject: [amsat-bb] AO-7 Scheduling page There is a link off of the AO-7 resource page for a logger for scheduling contacts but it doesn't work. Does anybody know of a real time/near time reflector for scheduling more specifically AO-7 contacts or even a general reflector covering all the satellites? Thanks in advance and 73, Scott AA5AM > From: kladuke1144(a)msn.com > To: amsat-bb(a)amsat.org > Date: Thu, 16 Dec 2010 11:55:37 -0700 > Subject: [amsat-bb] UA0QJ > > All, > > Boris, UA0QJ (Asiatic Russia) is active on AO7 mode B. He has been operating CW so far. He lists his qth as PP42TA in the online AO7 log. > > 73 > WC7V > Kerry > _______________________________________________ > 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 _______________________________________________ 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

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UA0QJ
by KERRY LA*DUKE 16 Dec '10

16 Dec '10

All, Boris, UA0QJ (Asiatic Russia) is active on AO7 mode B. He has been operating CW so far. He lists his qth as PP42TA in the online AO7 log. 73 WC7V Kerry

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Re: LU6QI Sked?
by Daniel Nick Kucij 16 Dec '10

16 Dec '10

He's good on QRZ, but here's the email he used when he replied to me: lu6quintas(a)gmail.com GL & Happy Holidays! 73 Nick KB1RVT

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LU6QI Sked?
by Daniel "Nick" Kucij 16 Dec '10

16 Dec '10

I received this query in an email from Luis, LU6QI. Perhaps someone is in a position to respond. > I am trying to attempt a qso with USA via AO7 or FO29. It could be > possible with some station from Florida, Do you know > who could be in conditions to make this try? > Best 73 de > --luis > LU6QI > ex LU6QI/W9-LQ16DX-LR6QI Happy Holidays! Nick KB1RVT

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Re RE: Clint
by Michael 15 Dec '10

15 Dec '10

Thanks Rick ! I did have opportunity to see and go through a mock up ISS at Huntsville. I was chaperoning a young astronaughts group. They talked alot about the interior but not the design and the exterior. Mike N8GBU

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Will the FTM-350AR do full-duplex?
by Michael Pfeuffer 15 Dec '10

15 Dec '10

Hi all, Time to shop for a new mobile rig for the car. The Yaesu FTM-350AR looks interesting, but I can't tell if it will do full-duplex for U/V and V/U modes. The product sheet on yaesu.com says "yes", but the operating manual is mute on the subject. Does anyone have experience with this rig? Thanks, --Mike WQ5C

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VE9EMS contact AO-51
by Denis Bourque 15 Dec '10

15 Dec '10

I did a contact on AO -51 tonight Dec 15, 20:00 utc with a American station and I did not have a pen or paper. I was wondering if you could send me a email for confirmation.

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Fastrac Keps
by Tony 15 Dec '10

15 Dec '10

All, Not seeing FASTRAC keps on Celestrak. Where can I find the most recent data? Tony -K2MO

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K5VGU in EM67 ( possibly EM68 ) Next Week
by K5VGU Duane Vigue 15 Dec '10

15 Dec '10

Heads up... I will be traveling to Kentucky next week ( 12/22 through 12/29 )...travel days will be 12/22 and 12/29...I will be in EM67 most of the remainder of this time-frame, but may venture a little further north to catch the Kentucky piece of EM68. Not exactly sure what passes I will be able to work, as of yet, but will try to make a few. For any contacts made during this PORTABLE work, please email me with contact details and I will QSL you ASAP. ( If we make contact and I don't hear from you, I will probably query you via email when I return home to Alabama) 73 to all. Duane, K5VGU Wetumpka, AL EM62wm ____________________________________________________________ How to Stay Asleep Cambridge Researchers have developed an all natural sleep aid just for you. http://thirdpartyoffers.netzero.net/TGL3231/4d0914ed43fab6c3d12st04duc

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