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

Re: Advice for transponder ops
by Jim Jerzycke 28 Jun '09

28 Jun '09

I also noticed a lot of "warbling" on the AO-7 stations I heard. I'm assuming this is the "FM'ing" I've read about. I cranked my power down to about 10 Watts on the AO-7 passes I tried to work, and my downlink sounded "OK", but some guys had a very 'watery' sound. I also noticed a couple of sats where the downlink seemed to "drop out" after I heard some very LOUD stations on them. I don't think it was receive blockage causing me to lose the signal, but it was something I never heard before. Jim --- On Sun, 6/28/09, n3tl(a)bellsouth.net <n3tl(a)bellsouth.net> wrote: From: n3tl(a)bellsouth.net <n3tl(a)bellsouth.net> Subject: [amsat-bb] Re: Advice for transponder ops To: "Andrew Glasbrenner" <glasbrenner(a)mindspring.com>, amsat-bb(a)amsat.org Date: Sunday, June 28, 2009, 8:45 AM AMEN brother! I called CQ multiple times on AO-7 in CW last night between 145.940 and 145.944 (downlink), and NOBODY was tuning down that far. I found that very disappointing, as I did the close proximity of all the stations on FO-29 and VO-52. I believe a lot of us could have made a lot more contacts on the linear satellites if we'd just used the passband. Thanks for this post Drew! 73 to all, Tim - N3TL -------------- Original message from "Andrew Glasbrenner" <glasbrenner(a)mindspring.com>: -------------- > I took this screen grab of this morning's eastern FO-29 pass, and what it > shows is in my opinion very illustrative of a problem that is getting worse > even on days other than Field Day. > > http://i139.photobucket.com/albums/q305/glasbrenner/radio/FO-29FDanotated.j… > > Spread out! There is no good reason that we should have a dozen operators > fighting over the center 15 kHz of a 100 kHz wide transponder. Remember the > gentlemen's agreement is the lower third is for CW, middle 1/3 is for mixed > ops, and the upper 1/3 is for SSB. There is nothing magic about the Doppler > shift at the very center of the passband that simple addition and > subtraction can't duplicate elsewhere. > > Just my opinion, and please take it constructively. > > 73, Drew KO4MA > > _______________________________________________ > 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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Velocity factor
by PE0SAT 28 Jun '09

28 Jun '09

Thanks for reading, Hi read the following and look at the image attached, after that, can you tell me if there is a velocity factor when calculating the 1/4 lambda distance between the horizontal and vertical antenna? The "Physical Method" following a different technique in order to avoid the use of coaxial piece for the necessary 90° phase's difference. Here the "Phase Difference" has been achieved by "shifting" (moving) each element of the 2nd (Horizontal) antenna exactly one Quarter-Wavelength (ë/4) forward in space, vis-a-vis to each element of 1st (Vertical) antenna onto the common Boom. Thanks, Jan -- With regards PE0SAT Internet web-page http://www.ham.vgnet.nl/

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Original 13 Colonies Special Event Update - K2T
by claryco＠aol.com 28 Jun '09

28 Jun '09

Instead of signing K2J as initially planned, I was able to get "K2T" ("T" since North Carolina is the "Tarheel" State) assigned to me at the last minute for the 1-4 July time frame. K2J will still be on the air from NC, at least on HF, and I'll be QRV on both HF as well as the sats. I'll be on the FM birds at the least; the linear sats will be used as well if I can get my Acer netbook to use SatPC32 to talk to my 897 and?adjust the freqs for Doppler. Contacts with either K2J or K2T will count for North Carolina toward the certificate offered for the event. Nine of the 13 colonial states will have sat stations on during the event. We're still looking for ops for Connecticut, Delaware, Maryland, and Pennsylvania. Pse note that the special event runs the calendar days of 1-4 July; per the event web site, it officially runs out at 05/0400Z July. Finally, for?any sat op who is a county hunter, I'll be running North Carolina counties on both CW and SSB on 20, 30, and 40 meters as K2T throughout the event period and then using my regular call afterward on the way home to Florida. Spots of my HF county hunting operation will be available at http://ch.w6rk.com/?and will include the county that I'm in at the spot time shown. Although the grid square is not indicated on this web site, it shouldn't be difficult to identify since the county I'm in is shown. 73, Jim, ND9M / VQ9JC / K2T

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ISS Contact
by David H. Jordan 28 Jun '09

28 Jun '09

Thanks to the freq update from Kenneth this morning, the LMARS N4EH sat station had a QSO with Bob Thirsk, VA3CSA on the 14:56 UTC pass this morning. Dave, AA4KN and J.D., N4VIL Sent via BlackBerry from T-Mobile

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Advice for transponder ops
by Andrew Glasbrenner 28 Jun '09

28 Jun '09

I took this screen grab of this morning's eastern FO-29 pass, and what it shows is in my opinion very illustrative of a problem that is getting worse even on days other than Field Day. http://i139.photobucket.com/albums/q305/glasbrenner/radio/FO-29FDanotated.j… Spread out! There is no good reason that we should have a dozen operators fighting over the center 15 kHz of a 100 kHz wide transponder. Remember the gentlemen's agreement is the lower third is for CW, middle 1/3 is for mixed ops, and the upper 1/3 is for SSB. There is nothing magic about the Doppler shift at the very center of the passband that simple addition and subtraction can't duplicate elsewhere. Just my opinion, and please take it constructively. 73, Drew KO4MA

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Re: Advice for transponder ops
by Jim Jerzycke 28 Jun '09

28 Jun '09

I noticed it, too. I was up at the top-end all by my lonesome because I didn't want to step on anybody! Jim KQ6EA --- On Sun, 6/28/09, Andrew Glasbrenner <glasbrenner(a)mindspring.com> wrote: From: Andrew Glasbrenner <glasbrenner(a)mindspring.com> Subject: [amsat-bb] Advice for transponder ops To: amsat-bb(a)amsat.org Date: Sunday, June 28, 2009, 7:25 AM I took this screen grab of this morning's eastern FO-29 pass, and what it shows is in my opinion very illustrative of a problem that is getting worse even on days other than Field Day. http://i139.photobucket.com/albums/q305/glasbrenner/radio/FO-29FDanotated.j… Spread out! There is no good reason that we should have a dozen operators fighting over the center 15 kHz of a 100 kHz wide transponder. Remember the gentlemen's agreement is the lower third is for CW, middle 1/3 is for mixed ops, and the upper 1/3 is for SSB. There is nothing magic about the Doppler shift at the very center of the passband that simple addition and subtraction can't duplicate elsewhere. Just my opinion, and please take it constructively. 73, Drew KO4MA _______________________________________________ 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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Re: AO-27 question
by Jim Jerzycke 28 Jun '09

28 Jun '09

Tanks, everybody. I suspected that's what was happening, and reading the AO-27 pages "kinda sorta" confirmed it, but I'd just never *heard* the bird before. Guess my receive setup is working as expected! 73, Jim KQ6EA

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ISS last pass up and down links ??
by David H. Jordan 28 Jun '09

28 Jun '09

What is the ISS using for up and downlinks on the last pass and rest of today? Sent via BlackBerry from T-Mobile

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VA3CSA Active from ISS...
by Andrew Glasbrenner 28 Jun '09

28 Jun '09

on the 1325 UTC pass, 145.800 downlink. 73, Drew KO4MA

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P3E and Eagle status
by Robin Theunis 28 Jun '09

28 Jun '09

Hello satelite operators, Do you know what the current status is of P3E and EAGLE? When will be it ready? When will be it launched? 73 Robin ON8RTH

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