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

WANTED G5600B Elevator
by Dave Aitch 17 Dec '07

17 Dec '07

Looks/sounds like the elevator part of my trusty G5600B has finally given up the ghost. Anyone got a working one for sale please ? ( UK Only ) 73, Dave. Portland. Dorset. IO80SM AMSAT 5766

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ANDE now @220km
by Henk, PA3GUO 17 Dec '07

17 Dec '07

As I am not so much into maths on this topic, the only thing I do is plot the current heigth of ANDE in the graph: http://home.vianetworks.nl/users/hamoen/pa3guo/ande_predict_pa3guo_12dec200… One might conclude from this that from 220km to de-orbit the graph shows ~12 days, so de-orbit today + ~12 days = ~24 Dec. ... BUT: if for any reason ANDE comes down faster we're almost there ! There is a good bunch of activity these days; many stations Igate the packets, many stations make contacts via ANDE in these final days. And: have a look at http://www.ande-deorbit.com for details on the AWARD Henk, PA3GUO http://www.qsl.net/pa3guo

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Radios with built in duplexers How best to use?
by Michael Tondee 17 Dec '07

17 Dec '07

It looks like I'm going to be able to afford to buy a dual band FM rig which will get me a little more back into the sats but the ones in my price range have built in duplexers. I guess the only way I can use two antennas is to use another duplexer up at the antennas and split the coax there but it seems like I'm going to get signal loss doing that. The other thing I've thought about is going with a dualband antenna where I would have one cable without all the extra connections but I'm wondering if a problem might arise with using a 70 cm preamp in that configuration. Would the 70cm preamp RF bypass relay work when 2meter RF was transmitted? Assuming it would, would it pass the 2 meter TX and RX signals through otherwise? I know I should know this but I'm kind of stumped. Any information or suggestions would be greatly appreciated. Tnx and 73, Michael, W4HIJ AMSAT # 36017

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G8ATE Project Oscar Celebration Successful
by Dave Guimont 16 Dec '07

16 Dec '07

Congratulations are in order for G8ATE's (Rob) thoughtful origination of GB ZERO OSCAR ONE (GB0O1). Marty Davidoff's THE SATELLITE EXPERIMENTERS MANUAL preserved it for posterity....And I would like to see Rob's efforts celebrating it repeated annually by ALL AMSATS worldwide. I quote from Marty's first edition: "And so, on December 12,1961, at 2042 GMT, Discover XXXVI was launched into orbit, carrying into separate orbit OSCAR 1 guided in its flight into history by the thoughts and prayers of thousands of radio amateurs who stand on the threshold of tomorrow." It sent a simple "hi hi", and the speed of transmission gave an indication of its temperature. CERTAINLY AN EVENT WORTH CELEBRATING ANNUALY... During the five day event I was fortunate to make contacts (ssb, FM and cw) on AO7, VO52, VO50 and AO51, and mentioned the GB0O1 callsign on them all, my only option in San Diego, limited by LEO's. A digital carry over did not seem to constitute a CONTACT; my old fingers make it difficult for me to "talk" with them! Tnx agn to Rob, to the other GB'ers who assisted, and to my respondents... A high spot in my 71 year interest in ham radio. I ("bootlegged") on cw in 1937. 73, Dave, WB6LLO dguimon1(a)san.rr.com Disagree: I learn.... Pulling for P3E...

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AO-27 pass 2035 UTC
by Ed Tump 16 Dec '07

16 Dec '07

Folks, I was able to make my 2nd contact using this sat but my tape recorder did not work and neither did my brain. Anyone that knows who I "spoke' to please let me know. I can only remember that is was a gentleman from Washington, DC. Thank you. 73, Ed KC9GWK Grid EN52 AmSat Member

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AMSAT UK Colloquium - Dates for 2008 Event
by Jim Heck 16 Dec '07

16 Dec '07

Hi Folks, Please be advised that the dates for the next AMSAT-UK Colloquium are 25/26/27 July 2008. Location and general arrangements will be similar to last year's event. More details later. Please note the date in your diaries NOW. Wish best wishes for the Festive Season HNY es 73 Jim G3WGM Hon Sec AMSAT-UK

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UK Space competition.
by G0MRF＠aol.com 16 Dec '07

16 Dec '07

Further details of the UK schools competition to put an experiment into space are available here. _http://www.spaceexperiment.info/_ (http://www.spaceexperiment.info/) Apparently the experiment will be powered from the host satellite's 28V supply and data will be downlinked via its transmitter. Thanks David G0MRF

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UK AMsat website been hacked!
by Chris Bloy 16 Dec '07

16 Dec '07

Hi All, The UK Amsat sites been hacked, anyone on here know who to contact to put it right? www.uk.amsat.org Thanks, Chris

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satscape tv
by Mr Jeffrey L Ross 16 Dec '07

16 Dec '07

hi folks, thought I would let everyone know that satscape has something called satscape tv now with neat stuff about ham radio and the sats. check it out at http://www.satscape.co.uk/tv.html just in case people dont know about it or want to know about it. 73 kc8gkf p.s. renewing my membership with amsat asap and am going to ask all the hams I know to join.

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Re: Phase 4 versus Eagle
by Tom Clark, K3IO 16 Dec '07

16 Dec '07

In a private note, Ed (KL7UW) pointed out that his gain numbers had assumed an aperture efficiency of 55%. Given this ~-3 dB value for the losses, his "gain" and my "directivity" values (as contained in the AMSAT Symposium paper I referenced) are in agreement. Thanks to Ed for explaining his assumptions. 73, Tom

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