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

SatPC32 with Icom 706MK2G
by John Germanos 18 Apr '10

18 Apr '10

Has anyone sucessfully interfaced an Icom706 with SatPC32? The radio is not mentioned on the list. John WB9PNU

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Arecibo recordings
by Luc Leblanc 18 Apr '10

18 Apr '10

Here is 2 recordings of april 17 Arecibo EME transmission received on a linear 24 elements yagi with an Icom preamp on an FT-847 60' of LMR- 400. http://www.yourfilelink.com/get.php?fid=541211 http://www.yourfilelink.com/get.php?fid=541210 http://www.yourfilelink.com/get.php?fid=541209 My first observation is while some seems to report great reception with moderate set up? i cannot say my first EME reception is Q5... When you listen the audio file put your volume up as KP4AO is way down in the noise but after a couple of try you will be able to detect some words from them. The CW recording is much better with the maximum of filtering. Conclusion:1- An LEO class satellite station does not make an EME station at all. 2- Accurately reporting a reception by ears is not an exact science... recording tells the truth without any doubts 3- My third file is giving some explanation about why my JT65B program give's me 4 EME call sign: F5BUU KU7Z K3AX IQ2CJ I will try this mode if they used it but as i does not want to be controversial i think the 4 stations that i got on my JT65B screen where probably never transmitting at the time of reception!!! Just read the third file above and you will be able to understand more my point 2! Anyway it was my first EME SWL reception "i hope" as some just tells me it is possible that tropo scater reflection in the caribbean and ducting made some getting the Arecibo signal this way as their EIRP made it quite possible explaining the rapid QSB reported by some station. Here as soon as i move the antenna off by 10 deg Arecibo disappear. Just to pointed out i was listening the HAARP EME test 2 years ago and i was able to copy their HF ionospheric signal and their moon reflected signal much much weaker but some on the world where only able to get the moon reflected signal as they where out of range form the standard HF propagation path. Just to warned those in the tropo scatter/RF ducting path from Arecibo to checked if moving their antenna off the moon make the signal disappear. P.S. If someone is aware of an audio software able to filtered out the noise from a recording just pointed me toward the source. "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE

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Yaesu 736 help
by Nick Pugh K5QXJ 18 Apr '10

18 Apr '10

I have a Yaesu 736 running with satpc32. It has work find until today now the tx frequency and mode cannot be set by satpc32. Satpc32 does change the rx frequency and I have played with the delay setting in satpc32. Any suggestions?? Thanks nick Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School

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Arecibo
by Bob- W7LRD 18 Apr '10

18 Apr '10

Very consistant signal 910/40el cp. I wish they would use dxpedition qso methods for more qso/hr. This is a very finite opportunity. Had fun anyway, better luck tomorrow. 73 Bob W7LRD

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Preamp mounting?
by Greg D. 18 Apr '10

18 Apr '10

Hi folks, So, a follow-up to my previous message. All this discussion about EME got me thinking... We're always taught to put your preamp as close to the feed point as possible, but as with everything, there are tradeoffs. Where should the Preamp be mounted? Choices: 1 - on the antenna boom, at the feed point (or attached to the CP relay) 2 - on the rotor cross arm 3 - below the rotor, where the flex transitions to the main feed I'm thinking that #1 is a problem. Yes, it's the shortest run, but you've got the weight of the preamp at the far end of the antenna, unbalancing things. Depending on the antenna, it might be right in the middle of a bunch of elements, so putting a metal box there might upset the antenna's performance or impedance. It's would also be subjected to the strong RF fields of the antenna during transmit. #2 is probably the best; fairly short coax run on the antenna side, and somewhat outside of the RF field. #3 (what I have) is most convenient, and has one less set of connectors to go bad, and one less wire to snake around the rotor. Weather proofing is easier when the object being proofed can't move, and mounting the preamp on the tower, for me at least, is a lot easier. And, it's not THAT much more coax to the antenna. Thoughts? Greg KO6TH _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28…

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Call for Papers--2010 ARRL/TAPR Digital Communications Conference
by Mark Thompson 18 Apr '10

18 Apr '10

Call for Papers--2010 ARRL/TAPR Digital Communications Conference Posted by: "Ford, Steve, WB8IMY" sford(a)arrl.org wb8imy Date: Thu Apr 15, 2010 11:12 am ((PDT)) Technical papers are solicited for presentation at the 29th Annual ARRL and TAPR Digital Communications Conference to be held September 24-26, 2010 near Portland, Oregon. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2010. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

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Arecibo--MUCH louder today!
by Mark L. Hammond 17 Apr '10

17 Apr '10

Hearing test carriers MUCH better today! Give it a listen, they are saying 350W output today (rather than 30W yesterday ;) 73! Mark N8MH Mark L. Hammond [N8MH]

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EME
by ANTHONY JAPHA 17 Apr '10

17 Apr '10

Hi all, On a lark, I took my FT817 with ARR preamp and 8-el cheap yagi downstairs to listen for KP4AO. They were about 349 on CW around 2000Z. Unbelievable, I thought. I have tremendous noise of all manmade kinds here in Manhattan. You can only imagine how loud the noise is. Still, KP4AO was in there steadily for as long as I listened, about 15 minutes.. Another reason for my surprise is that the FT817 has no CW filter. With a filter, I'm sure they would have been Q5. Pointing the beam was not critical at all. This all reminds me of W2RS's backyard EME article of some years ago. Are you in there, Ray? Anyone out there with a spare million watt amp? 73, Tony, N2UN

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Amsat Weekend Sympoium 2010 & Question
by Stuart Balanger 17 Apr '10

17 Apr '10

*Hi all, A couple of suggested places to visit @ this yrs Sympoium: San Fallipo Residence & Musical museum In Barrington Hill,Ill. Chicago museum of Science & Techmology! Also, there is both an elevated rail line& a Blue line Subway line that goes from O'Hare Airport fto Downtown Chicago (Near Chicago's Union RR Terminal) For more info (Subway & elevated rail):www.transitchicago.com 73,.Stu (WA2BSS) PS Home of "Walkway over the Hudson"! Also, does anyone know where I can go (Online) to download a copy of "MxW? *

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Thanks - re: Arecibo
by David Barber 17 Apr '10

17 Apr '10

Thanks guys, had a blast. A brilliant Saturday evening. Not enough antenna gain or power here to work you but hearing you over the last two evenings has been very satisfying. Hope to listen again tomorrow. Congratulations to all and to those that made it, I heard several UK stations confirmed. Best wishes and thank you to you all. Regards David G8OQW ******** -----Original Message----- From: moon-net-bounces(a)list-serv.davidv.net [mailto:[email protected]] On Behalf Of joe(a)Princeton.EDU Sent: 17 April 2010 16:39 To: moon-net(a)list-serv.davidv.net Subject: [Moon-net] Arecibo Update Hello from Arecibo: Update for today (Saturday) : we have diagnosed our amplifier problem and are hard at work on repairs. With any luck we should be good for 350-400 W today. We have also located a power supply for a solid-state amp that should be good for a bit more power, maybe 500 W. Keep your fingers crossed... we *should* be 10-13 dB louder today. Operating plans for today: SSB at first, then CW. As before, we Tx on 432.045 and Rx on 432.050 - 432.060. If we exhaust the CW pileup we will go to JT65B. In JT65B mode, KP4AO will transmit first on 432.045. Please call us between 432.045 and 432.049. Expected QSO pattern will be like this: 1. CQ KP4AO FK68 2. KP4AO K1ABC FN42 3. K1ABC KP4AO FK68 OOO 4. RO 5. RRR 6. 73 (... tail-ender...) KP4AO G4XYZ IO83 7. G4XYZ KP4AO FK68 OOO ... and so on. We will not send 73s; please feel free to call us following our "RRR" transmission, as G4XYZ did in the example above. On Sunday we may work any mode, depending on available activity. We will certainly be on JT65B for at least half of our Sunday moon window. Remember: please limit yourself to one QSO with us, regardless of mode. 73, Joe, K1JT ... for the KP4AO team _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

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