December 2007 - AMSAT-BB - mailman.amsat.org

Request for online sources of antenna modeling stuff
by STeve Andre' 04 Dec '07

04 Dec '07

Hello All, My wife (n8kpl) is taking a mathmatical modeling class, and she is looking for sites that talk about modeling of antennas. Since this is a math class, finding programs that do it isn't quite enough, since she has to do the work. I'm not finding what much stuff online. Thus I am asking on these two lists for help in finding stuff. An online course in antenna modeling would be great, finding formulas and practical experience would be great too. I'm thinking of yagi antennas as a good choice. We're looking at books as well so if you have favorites, that would be good to know. I have an interest in this myself, so this isn't just trying to get data for a school project. ;-) Thanks all, --STeve Andre' wb8wsf en82

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FS: Arrow Antenna
by Jeff Davis 03 Dec '07

03 Dec '07

I've got a spare Arrow Antenna -- the Arrow II Model 146/437-10WBP satellite antenna (split boom with the 10W duplexer @ cable) -- for sale. It has never been used other than to be assembled once and then disassembled. In the original bag with original instructions. New price is $139 + $10 shipping. I'll ship it to your door CONUS for $110. Paypal, money order, personal check, or grand prize winning Powerball lottery ticket accepted. No trades. Contact me off the list for more details. Thanks and 73, Jeff, KE9V

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AO7
by k3szh＠netzero.net 03 Dec '07

03 Dec '07

Congratulation Frank K9CIS for passing the 1000 mark contact on AO7.You are the only 2ND station in the whole USA to do it,plus you did it by your great CW skill. Again well done,I am holding my glass high. 73 Joe K3SZH Amsat 3788

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Re: How to make phasing cable for 440 MHz Arrow II
by Wayne Estes 03 Dec '07

03 Dec '07

Click the links below to see how KB2M modified the 7+7 Arrow 70cm yagi to be circular polarized. Hand-written diagram from W0OQC: http://i238.photobucket.com/albums/ff239/Wayne_Estes/Ham%20Radio/W0OQCHarne… Calculations to determine length of the two 70 Ohm matching cables and the 93 Ohm phasing cable: http://i238.photobucket.com/albums/ff239/Wayne_Estes/Ham%20Radio/W0OQCcalcu… Photo of KB2M's finished wiring harness: http://i238.photobucket.com/albums/ff239/Wayne_Estes/Ham%20Radio/KB2MArrowm… Photo of KB2M's RHCP 7x7 Arrow yagi on the mast: http://i238.photobucket.com/albums/ff239/Wayne_Estes/Ham%20Radio/KB2MArrowo… Note that this was done as a portable uplink antenna for AO40. I can't think of any currently functioning ham satellites that would really need a RHCP 70cm antenna. The impedance matching cables are 3/4 wavelength long. That makes the dimensional tolerances 1/3 as critical compared to making 1/4 wavelength cables. The phasing cable is 1/4 wavelength long for obvious reasons. Also note that the dimensions should be measured from the center of the Tee to the end of the pin on the BNC connectors (connector and Tee contribute to the electrical length). Wayne Estes W9AE Oakland, Oregon, USA, CN83ik

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About CAPE telemetry / Acerca de la telemetría de CAPE.
by HEYLER YESID LEDEZMA LEUDO 03 Dec '07

03 Dec '07

Hi. I am Heiler Ledezma, researcher from satellite 'Libertad 1', I want to know if somebody could to send to me the telemetry received about the cubesat CAPE. This information is very important for somethings researchings. Thanks. ------------------------------------------------------------------------------------------------------------------ Buenas tardes. Soy Heiler Ledezma, investigador del satélite 'Libertad 1 ', quisiera saber si alguien podría enviarme la telemetría recibida de el cubesat CAPE. Esta información es muy importante. Gracias. Heiler Yesid Ledezma Leudo. Estudiante de Tecnología Electrónica -U. Distrital. --------------------------------- Comparte video en la ventana de tus mensajes (y también tus fotos de Flickr). Usa el nuevo Yahoo! Messenger versión Beta. Visita http://mx.beta.messenger.yahoo.com/

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About CAPE telemetry / Acerca de la telemetría de CAPE.
by HEYLER YESID LEDEZMA LEUDO 03 Dec '07

03 Dec '07

Hi. I am Heiler Ledezma, researcher from satellite 'Libertad 1', I want to know if somebody could to send to me the telemetry received about the cubesat CAPE. This information is very important for somethings researchings. Thanks. ------------------------------------------------------------------------------------------------------------------ Buenas tardes. Soy Heiler Ledezma, investigador del satélite 'Libertad 1 ', quisiera saber si alguien podría enviarme la telemetría recibida de el cubesat CAPE. Esta información es muy importante. Gracias. Heiler Yesid Ledezma Leudo. Estudiante de Tecnología Electrónica -U. Distrital. --------------------------------- ¡Capacidad ilimitada de almacenamiento en tu correo! No te preocupes más por el espacio de tu cuenta con Correo Yahoo!: http://correo.yahoo.com.mx/

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Evening SO-50 NA passes tonight
by Jonny 290 03 Dec '07

03 Dec '07

If anybody is like me and likes to burn the midnight oil, I'll be working the two overnight SO-50 passes, the first from 0638-0652Z and the second from 0820-0831Z. I know that traffic is very low on the birds at night, but I just thought I'd throw it out there. My station is now in the 'tune and tweak' mode and I am attempting to work as many passes as possible so I can plot my antenna/receiver response vs. the pass altitude and bearing to get an idea of my environment here; unfortunately it's tough as I am at work from 2100-0500Z. also if anybody wants to chat about some sort of overnight sked, that'd be awesome - I'm sure there's at least one or two NA ops that keep the same hours that I do. :P Up to four contacts on the birds, enjoying every pass as it's exciting as heck! my YL figured out that every time a certain alarm goes off on my cell phone I scamper back into the shack for 15 minutes and the U-110 starts thump thump thumping :) Matt KC4YLV em26

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Re: AO-16 update--for AMSAT NEWS Release
by Wouter Jan Ubbels 03 Dec '07

03 Dec '07

Hi all, great to see AO-16 come back to live, It's always good to hear its steady buzzing sound:) Based on a suggestion by Mike, DK3WN, I have now also included decoding of the 7 short 2-byte MBL telemetry frames from AO-16 in the latest release ( v1.0.3 Beta) of Warbler (an AO-16 soundcard demodulator program I wrote). These frames are included in the .kss file which Warbler creates, and can therefore be viewed with DK3WN's MBL telemetry decoder. You can download the latest release from my website at http://home.casema.nl/b.ubbels/Warbler.htm 73 Wouter Jan Ubbels PE4WJ

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FS: Kenwood TH77 dualband HT
by John Geiger 03 Dec '07

03 Dec '07

I have for sale a Kenwood TH77 dualband (2m/70cm) HT in good condition. It does dual receive which would work perfectly for the FM sats like AO51 and AO27. It comes with the antenna, and 1 PB-6 battery that holds a charge, but I can't guarantee for how long. The HT can run directly off of 12 volts from a jack in the top-for 5 watts out. It does not have the tone board installed, but they should still be available somewhere. It also has the original box and manual. I will include one extra long life battery that is dead and needs rebuilding. There is no charger for the PB-6 included, but you can charge it with a drop in or universal charger. I am asking $65 plus shipping for this package. I can take paypal, check, or MO. 73s John AA5JG ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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FS Bird Model 43 & Slugs
by Steven Raas 03 Dec '07

03 Dec '07

Bird Model 43 Watt meter S/N 165665 Great condx 'N' conectors Price $160.00 Shipping included to lower 48 states Bird Slug 500E 500w 400-1000 mhz unused/factory sealed - $70.00 Shipping Incl to lower 48 Bird Slug 100C 100w 100-250 mhz - $50.00 Shipping Incl to lower 48 Bird Slug 250C 250w 100-250 mhz - $60.00 Shipping Incl to lower 48 Bird Slug 50E 50w 400-1000 mhz $50.00 Shipping incl to lower 48 Inquiries or questions to sraas(a)optonline.net 73 Steven J.Raas QRV From FN20vg on 2/432 Terestrial-Sats-Digital-EME Member of - ARRL & AMSAT Supporter of N3FJP Software <http://www.n3fjp.com/> http://www.n3fjp.com Page - <http://n2jdq2007.tripod.com/> http://n2jdq2007.tripod.com/

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