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

Re: TS-790 and sat comunication
by Mark L. Hammond 26 Oct '09

26 Oct '09

Hello Mario, For the TS-790, the MAIN band transmits and receives. The SUB band is receive ONLY. So, for TS-790 satellite operations, you should use: MAIN band for Transmitting SUB band for Receiving It's a very nice radio for satellite operations! I hope you enjoy it. 73, Mark N8MH Date: Mon, 26 Oct 2009 13:32:07 +0000 (GMT) From: Mario Manissero <mario.manissero(a)yahoo.it> Subject: [amsat-bb] TS-790 and sat comunication To: AMSAT-BB(a)amsat.org Message-ID: <388724.67154.qm(a)web25701.mail.ukl.yahoo.com> Content-Type: text/plain; charset=utf-8 Hello folks, Recently I have in my station a TS-790 for satellites. In the past the radio used for this activity was a IC-821. On that radio, for sat activity, is suggested to use the main band for downlink reception and the sub band for the uplink. This because the reception in main band is better instead of sub receiver. And the radio, when sat mode is selected, allow that configuration. Now on the TS-790, Have I to follow the same setup? This because, I have done many attempts to use this radio how the Icom without results. Tnx for your time 73 Mario IK1ZQJ -- Mark L. Hammond [N8MH]

1 0

SVHFS Conference Call For Papers
by Robin Midgett 26 Oct '09

26 Oct '09

Call for Papers 14th Annual Southeastern VHF Society Conference April 23rd and 24th, 2010 Morehead State University in Morehead, Kentucky The Southeastern VHF Society is calling for the submission of papers and presentations for the upcoming 14th Annual Southeastern VHF Society Conference to be held at Morehead State Univeristy in Morehead, KY on April 23rd and 24th, 2010. Papers and presentations are solicited on both the technical and operational aspects of VHF, UHF and Microwave weak signal amateur radio. Some suggested areas of interest are: Transmitters Receivers Transverters RF Power Amplifiers RF Low Noise Pre Amplifiers Antennas Construction Projects Test Equipment And Station Accessories Station Design And Construction Contesting Roving DXpeditions EME Propagation (Sporadic E, Meteor Scatter, Troposphere Ducting, etc.) Digital Modes (WSJT, etc.) Digital Signal Processing (DSP) Software Defined Radio (SDR) Amateur Satellites Amateur Television In general papers and presentations on non weak signal related topics such as FM repeaters and packet will not be accepted but exceptions may be made if the topic is related to weak signal. For example, a paper or presentation on the use of APRS to track rovers during contests would be considered. The deadline for the submission of papers and presentations is February 5, 2010. All submissions for the proceedings should be in Microsoft Word (.doc). Submissions for presentation at the conference should be in PowerPoint (.ppt) format, and delivered on either a USB memory stick or CDROM or posted for download on a web site of your choice. Pages are 8 and 1/2 by 11 inches with a 1 inch margin on the bottom and ¾ inch margin on the other three sides. All text, drawings, photos, etc. should be black and white only (no color). Please indicate when you submit your paper or presentation if you plan to attend the conference and present there or if you are submitting just for publication. Papers and presentations will be published in bound proceedings by the ARRL. Send all questions, comments and submissions to the program chair, Robin Midgett K4IDC via K4IDC at comcast dot net. For further information about the conference please go to <http://www.svhfs.org>www.svhfs.org Thank you, Robin Midgett K4IDC 2010 Program Chair, SVHFS

1 0

Cute 1.7 Re-Entry
by John Heath 26 Oct '09

26 Oct '09

Its Official Cute 1.7 has re-entered. With no new elements from Space Track since 16:26 UTC on October 24th it was no surprise to see this afternoons posting at 15:03 stating that Cute 1.7 has decayed. There has been sudden rise in sunspot numbers and in solar flux over the past few days which no doubt speeded up its demise, which probably took place just a few orbits after the 16:26 UTC elements. I will announce the re-entry competition winner after I have attempted to get an estimate of the re-entry time. If anyone cares to post an opinion based on the last element sets on Space Track I would be pleased to compare results. 73 John G7HIA

1 0

Err ... right.
by John Hackett 26 Oct '09

26 Oct '09

Yes, Dan, I did get that bit. The other half of the "twisted pair" is GM1SXX, IT engineer by trade and software guru. If my proposal does bear fruit, would you be interested in giving D-Rats a haircut?. (read: produce a dedicdated cut-down 'space' version). As per today, we're still in the concept thrashing department. The first dedicated D-Star satellite launch is slated for October 2010. Another 'notable' is Alexander Zaitzev, director of IZMIRAN Russia. - (Ionospheric sounding studies for the University of Moscow) - by small satellites. Information about IZMIRAN can also be found on the Observation website. 73 John. ......................................................................... > Date: Mon, 26 Oct 2009 07:42:11 -0700 > From: dsmith(a)danplanet.com > To: la2qaa(a)amsat.org > CC: kn0n(a)whatcomradio.org > Subject: Re: Desert Rat Query. > > > As I have previously mentioned, I run EU-Amsat (Amateur satellites) and > > I noticed that our store-and-forward fleet is on it's last legs. I have > > PE1RAH who designed and built the current VO-52 back-up transponder - > > and whom has just built a Picoponder ... details at my website > > <http://www.Observations.biz) designing a dedicated transponder for > > future emergency communications. > > > > I mentioned to Brian that D-Rats would be the software of choice. > > That's very interesting, although I'm quite sure that someone (perhaps > myself) would need to work on a separate piece of software that would be > suitable for embedding in such a device. D-RATS itself is rather large > and depends on a wide range of additional components that you wouldn't > want to put on a resource-constrained satellite. However, the protocol > and all the data formats are open, so crafting a "satellite edition" of > the message parts of D-RATS shouldn't be too hard. > > Good luck! > > -- > Dan Smith > dsmith#danplanet.com, s/#/@/ > www.danplanet.com > KK7DS >

2 1

I: TS-790 and sat comunication
by Francesco Grappi 26 Oct '09

26 Oct '09

Hi Mario, I'm using this radio for satellites since 1998. It's work great without problem at all. 73" Francesco IW4DVZ -----Messaggio originale----- Da: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] Per conto di Mario Manissero Inviato: lunedì 26 ottobre 2009 14.32 A: AMSAT-BB(a)amsat.org Oggetto: [amsat-bb] TS-790 and sat comunication Hello folks, Recently I have in my station a TS-790 for satellites. In the past the radio used for this activity was a IC-821. On that radio, for sat activity, is suggested to use the main band for downlink reception and the sub band for the uplink. This because the reception in main band is better instead of sub receiver. And the radio, when sat mode is selected, allow that configuration. Now on the TS-790, Have I to follow the same setup? This because, I have done many attempts to use this radio how the Icom without results. Tnx for your time 73 Mario IK1ZQJ _______________________________________________ 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

1 0

Making a Circular Polarized antenna
by Greg D. 26 Oct '09

26 Oct '09

Hi folks, Just curious... One of the ways to make a circularly polarized antenna is to feed two linearly polarized antennas in-phase, but mount one them 90 degrees rotated from the other, and 1/4 wavelength ahead of it. Couldn't one also mount the two antennas 180 degrees rotated and 1/2 wavelength ahead? The reason I ask is that I have some flat panel 2.4 ghz "Wi-Fi" antennas, and the mounting holes work out best that way. The only effect I can think of is that the array will probably pick up signals from both left and right polarizations, which could actually be handy. Greg KO6TH _________________________________________________________________ Windows 7: It helps you do more. Explore Windows 7. http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WL…

3 3

Re: AO-51 in V/US repeater until November 1
by Bob- W7LRD 26 Oct '09

26 Oct '09

Hi Drew et al I monitored the last pass with three radios. On the standard 70cm downlink. A three foot primestar dish with transystem 3731aa downconverter to a TS700A transceiver. Finally a "portable" 20 turn helix with a IC-W32a connected to a Keps 13-LNC2-PH downconverter. The primestar dish and 70cm antennas tracked automatically via a LVB tracker. With the 20 turn helix I stood out in the driveway (w/rain) waving it around at the sky (neighbors already look at me funny). I was surprised how sharp the 20 turn helix is, 20 degrees off the satellite and it's almost gone. Solid full quieting signals on all three receivers, obviously the dish was stronger. With monitoring all three receivers and tracking doppler manually I had no time to do any transmitting. A very busy and entertaining 10 minutes! I have a couple of pictures of the lash up should anyone like to see them, email direct. S o any of you AO-40 (sobsob) fans dust off your S band gear! 73 Bob W7LRD Seattle ----- Original Message ----- From: "Andrew Glasbrenner" <glasbrenner(a)mindspring.com> To: "Amsat-BB" <amsat-bb(a)amsat.org> Sent: Sunday, October 25, 2009 4:34:44 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] AO-51 in V/US repeater until November 1 FM Repeater, V/US Uplink: 145.920 MHz FM Downlink: 435.300 and 2401.200 MHz FM Reports on the S band transmitter would be appreciated. 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

1 0

volunteering
by Steve Daniels 25 Oct '09

25 Oct '09

Hi After reading various posts I decided that having time one my hands at the moment, I would like to volunteer to help out in whatever capacity I can. I think being able to help build a satellite is probably out of my league. But I could help out collating information and updating websites etc. I run my own web server built by myself and a few websites. Hopefully someone can contact me for a discussion on how I can help. Steve G6UIM Email steve(a)daniels270.eclipse.co.uk

5 10

KLM 22c and 40cx antennas for sale
by John Hansen 25 Oct '09

25 Oct '09

Long boom circular polarized Yagi's. Complete with manuals. $75 each plus shipping. These are UPS shippable. They have not been used in several years, but were working FB when last in service. PayPal accepted. Photos available at: www.johnahansen.com For more information contact John W2FS at john(a)hansen.net Thanks, John Hansen W2FS

1 0

Re: LVB Tracker
by WILLIAMS MICHAEL 25 Oct '09

25 Oct '09

I believe the KR-500 and G1000DXC could be upgraded for LVB control with some thought. My LVB tracker ran an old Wilson 500 rotor that I modified for several years before it gave out and I had to upgrade to a 5500. Since the Wilson had no transformer (all 120 VAC), I did it with relays. GL Mike, K9QHO, AMSAT 33589

1 0