AMSAT-BB April 2008

199 participants
382 discussions

Call for Papers--2007 ARRL/TAPR Digital Communications Conference

by Ford, Steve, WB8IMY

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. 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, 2007. 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

10 years, 2 months

AO-16 Update and brief mode change

by Mark L. Hammond

Hello All, AO-16 has been in its "voice mode" continuously for nearly a month now. Many thanks to all the users of this "new" bird! It is time to pause voice operations long to receive some MBL telemetry (limited as it is, it's all we have). Around 0920 UTC on 17FEB08 I plan to return AO-16 to digital mode in order to receive some telemetry. If all goes as planned, it should be back to "voice mode" during the same pass. If not, I'll try to catch it on the 1056 UTC pass. Most of you will be asleep, so I don't think it will interfere with too many contacts. Looking to the future, we can see that after several months of continuous illumination, AO-16 will begin to experience eclipse periods at the end of March. The eclipse periods will increase and extend through the summer. This may impact AO-16's power budget such that the transmitter output will have to be reduced in order to protect its 18 year old batteries. We'll know more after the eclipse periods begin in late March and early April. In the meanwhile, enjoy AO-16 and her strong signals! 73 on behalf of the command team, Mark L. Hammond [N8MH]

14 years

Santa docks at the ISS

by Ed Tump

Happy holidays! I got a kick out of this video: http://youtube.com/watch?v=_Di8mZLu0VE <http://youtube.com/watch?v=_Di8mZLu0VE&feature=PlayList&p=26B9B2ACB4AAC849& index=7> &feature=PlayList&p=26B9B2ACB4AAC849&index=7 Maybe he dropped off some more amateur radio gifts. 73, Ed KC9GWK Grid EN52 AmSat Member

14 years, 1 month

Yaesu G500 bearings, KLM antennas

by KYLE YOKSH

Hello, I've got a KR-500 and G500a rotor that need a good servicing. I've found a lot of great info in the archives that will help me, but still have a few questions.. I've read that the original bearings were steel, and begin to rust almost immediately after installation. Can anyone suggest a better quality bearing, and perhaps a source and part number? I've also read that the bearing cages are subject to failure, and some folks prefer to ditch them altogether. I'm also curious if anyone has any suggestions to optimize my old KLM crossed yagis? I use a KLM 2m14c and 43518c, and they seem to work fairly well, but are not exactly top performers. I've never opened the polarization switcher units on either antenna, but suppose I might want to clean the relay contacts? Since my tower must be tilted over to service the rotator and antennas, I'd like to get several years of service out of this gear. Thank you for any help. 73, Kyle K0KN

14 years, 4 months

RF connectors in 736R

by n1jez＠burlingtontelecom.net

Howdy, A while ago I seem to remember a discussion on availability of the small push on RF connectors used inside the FT-736R to interconnect boards. These same connectors are used in quite a few radios. They were a crimp on style. Anyone remember the source? Tnx 73, Mike N1JEZ AMSAT #29649 "A closed mouth gathers no feet"

14 years, 4 months

help tuning AO-16

by W0DXZ＠aol.com

I have a lot of trouble tuning in stations on AO-16,,, strong sigs, but i just haven't got the knack of it,,, I put the receiver on USB,,, even the most minor adjustments dont do it... any hints? All sounds like you are listening to SSB on an AM radio... by the time I get a station tuned in, they are gone 73 Bob W0DXZ **************Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp00300000002851)

14 years, 4 months

SEEDS reception...

by Mark Vandewettering

Well, I didn't get anything from Delfi C3 on its first pass over the West Coast, but I had heard that some people managed to get some signals from some of the other cubesats, so I set up for SEEDS on the low, second pass. Maximum elevation was only 9 degrees, and I recorded the pass with my FT-817 and a little voice recorder, tuning the doppler by hand. My morse skills are feeble, but even I could pick out the SEEDS in the telemetry stream. Audio is here: http://brainwagon.com/images/seeds.mp3 Congrats to all the teams! Mark

14 years, 4 months

AMSAT goes to the races -- photos

by Tom Clark, K3IO

This past weekend, W2GPS, WA4SXM and I attended the premier of AMSAT.ORG in Grand-Am Racing at the Virginia International Raceway (VIR). As reported earlier, Jim Jaeger (K8RQ) arranged for the AMSAT logo to appear prominently on the yellow Doran Racing Kodak #77 Dallara/Ford car driven by Brad Jaeger (Jim's son) and Memo Gidley. The Doran Racing web site has a gallery of photos featuring their #77 Kodak & #47 BSi cars available for viewing at http://www.doranracing.com/08_vir/photo.htm. The VIR race can be seen this coming Saturday on the cable SPEED CHANNEL from noon to 3PM EDT (16:00-19:00 UTC). AMSAT's logo will again be flying this coming weekend at the Laguna Seca track in California (see http://www.grand-am.com/rolex/schedule/event.cfm?eid=10). Rick and I have HUNDREDS of additional photos of the AMSAT car in action which we will post soon for your enjoyment. You will be able to see (a large photo of) the car in the AMSAT booth at Dayton. 73, Tom

14 years, 4 months

COMPASS or Cute ?

by Henk, PA3GUO

... interesting: Maybe I have mixed up COMPASS and Cute 1.7 ? I believed this was Cute, but now I start to believe this was in fact COMPASS: http://home.vianetworks.nl/users/hamoen/pa3guo/cute_17_pa3guo_29apr08_1820u… .. which means that what I thought was COMPASS was in fact Cute, and that the CW from Cute is good and COMPASS not. Ahhh ...: to many satellites flying by at the same time at the same frequency to confusing for me - trying to jump from one to the next sat :-)) Henk - PA3GUO

14 years, 4 months

Re: Fresh Delfi-C3 Kepler & Nova!!!

by Cor

Hello All, In my previous messages all sentences were together. Here are fresh keps (30-April2008) in a delfiC3.txt file: http://pd0rkc.ontwikkel.nl/DELFIC3/delfiC3.txt New keps are also on the DelfiC3 website. http://www.delfic3.nl/index.php?option=com_content&task=view&id=93&Itemid=1… 73's Cor PD0RKC Ham Radio In Space: http://iss.ontwikkel.nl

14 years, 4 months

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AMSAT-BB April 2008