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

Deployable Solar Panels on a 1U CubeSat
by Trevor . 22 Apr '10

22 Apr '10

Interesting presentation by Abhishek Bajpayee on deployable Solar Panels at http://www.ustream.tv/channel/CubeSatWorkshop/v3 A number of other presentations from the first two days are also available at this URL 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm ----

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: For sale, Yaesu VX-3R HT, ARR RF switched pre amp ( pre-amp sold)
by Michael Tondee 22 Apr '10

22 Apr '10

The pre-amp is sold. The VX-3R is still available. Thanks to everyone for their interest, Michael -------- Original Message -------- Subject: For sale, Yaesu VX-3R HT, ARR RF switched pre amp Date: Tue, 20 Apr 2010 17:19:26 -0400 From: Michael Tondee <mat_62(a)netcommander.com> To: amsat-bb(a)amsat.org I have for sale a Yaesu VX-3R dual band HT. While it is not full duplex, it works well as the RX side of a mode J handheld station. I've had it less than six months if even that long. It has never even been outside the house and is in like new condition. Of course box, manual, charger and stock rubber duck are all included. I'll also throw in a 3ft. long adapter cable that goes from the SMA jack on the radio to an SO-239 where an external antenna can be used. Price is $110.00 shipped priority mail in the lower 48. The pre amp is an Advanced Receiver Research SP432VDG with N connectors. The RF switching circuit is rated at 25 watts, I actually only ever used it on a receive only setup with the VX-3R. The pre amp has been mast mounted in a weatherproof enclosure. ARR says these units will withstand heat and cold extremes with no problem, they just have to be mounted in a waterproof enclosure if put outside. As with the HT the unit has seen very little use and is like new. Price is $85.00 shipped priority mail in the lower48. I will accept Paypal or a United States Postal Service money order as payment. Sorry, no international shipping. If you are interested, please contact me off list. Thanks for the bandwidth everyone, Michael, W4HIJ

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Congrats to K7CWQ
by Clint Bradford 22 Apr '10

22 Apr '10

Loren, K7CWQ, just received his VUCC award - using a FT-60R and Arrow Sat Antenna as his station. CONGRATULATIONS, Loren! Clint, K6LCS http://www.work-sat.com

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Re: Arecibo on 432 MHz Moon Bounce (some calculations)
by Idle-Tyme 22 Apr '10

22 Apr '10

do you calculators have commas? The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 4/22/2010 1:14 PM, Sil - ZL2CIA wrote: > Idle-Tyme wrote: >> On 4/21/2010 8:25 PM, i8cvs wrote: >>>> Comma or no comma, shouldn't matter >>>> 1000 mega watts or 1,000 Mega watts is still one thousand million >>>> watts! NOT one thousands watts. true? >>>> >>>> The Original Rolling Ball Clock >>>> Idle Tyme >>>> Idle-Tyme.com >>>> http://www.idle-tyme.com >>>> >>> Hi Idle-Tyme >>> >>> I don't agree with your statement: >>> >>> 1000 mega watt are one thousand million watt >>> 1,000 mega watt or 1.000 mega watt is only one million watt because >>> zero after the comma means nothing like 1,0000000000000 is still >>> one million watt or 1 MW >> NO! it's a comma, not a decimal point! it's one thousand, one >> thousand written 1000 or 1,000 is still one thousand they are exactly >> the same. > That's only true in the English speaking world, and this is the cause > of the confusion in this debate. > > In the Netherlands (and most of Europe), you would write one thousand > million watts as 1.000 megawatts. > > The decimal indicator in Europe is a comma. > For example, > 1,5 means one and a half > 1.000.000 means one million. > > Sil > (ex PA3HIL) > >

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OZ7SAT? Off the air?
by Mark L. Hammond 22 Apr '10

22 Apr '10

Does anybody (Ib ;) ) know if OZ7SAT is off the air? I haven't seen any telemetry updates in over a week. http://www.amsat.dk/oz7sat/tlm/ Thanks, -- Mark L. Hammond [N8MH]

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Re: Arecibo on 432 MHz Moon Bounce (some calculations)
by Fabio A 22 Apr '10

22 Apr '10

Hello all, just a curiosity, how did you found that the ERP is "... 243,902,443 Million Watts". Thanks 73s Fabio iw8qku ----- Original Message ----- From: "MM" <ka1rrw(a)yahoo.com> To: <amsat-bb(a)amsat.org> Sent: Wednesday, April 07, 2010 3:06 PM Subject: [amsat-bb] Arecibo on 432 MHz Moon Bounce > Hi all: > Here is a EME event you cant miss. > Dust off your CW key, its time for Satellite, QRP EME. > > The 1,000 foot dish has 60 dBi on 432 mc and 400 watts. > That comes out to be approximately 243,902,443 Million Watts ERP. > > enjoy > > wf1f > www.marexgm.org > > (thanks to KB1MGI for passing on this data) > > > Arecibo on 432 MHz Moon Bounce > > The Arecibo Observatory Amateur Radio Club will be putting the > 1000-foot radio telescope on the air for 432 MHz EME from April 16-18. > > It can be heard with a small hand-held yagi pointed at the moon > > The scheduled times of operation are: > > April 16: 1645 - 1930 UTC > > April 17: 1740 - 2020 UTC > > April 18: 1840 - 2125 UTC > > Callsign: KP4AO > > Tx Frequency: 432.045 MHz > > Rx Frequency: 432.050 to 432.060+ > > Tx power: 400 W > > Antenna gain: 60 dBi > > System noise temp: 120 K (cold sky) > > System noise temp: 330 K (when pointed at moon) > > KP4AO can be heard with a small hand-held yagi pointed at the moon and a > good receiver. A 15 dBi antenna and 100 W will be enough to work us on > CW. > > Operators at KP4AO will do their best to work as many stations as > possible. Each session will start with a brief announcement and CQ in > SSB. SSB QSOs may continue for 30 minutes to an hour, if the QSO rate > remains high. > > The mode will be shifted to CW as soon as it is judged that higher QSO > rates would result. > > We will listen for calls at frequencies 5-15 kHz higher than our own, > and even higher if QRM warrants. Callers who s-p-r-e-a-d o-u-t are more > likely to be copied. > > If you've already worked us in any mode, please do not call again -- > give others a chance. > > If we call "CQ QRP", we will listen for stations running 100 W or less > to a single yagi. Please do not answer such a CQ if you are running more > power or have a larger antenna. > > On April 18, if we reach a condition where most calling stations have > been worked, and we judge that operating in the digital mode JT65B would > produce a higher QSO rate, we will switch to JT65B. > > Note that any of these planned operating strategies may be changed as > circumstances dictate. > > We are extremely fortunate to have been granted access to the world's > largest radio telescope for this amateur radio good-will event. We look > forward to working as many stations as possible in the alloted time! > > >From QRZ.COM > > KB1MGI ...snip...

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W1RJA EME event, Echoes of Apollo
by Luc Leblanc 22 Apr '10

22 Apr '10

W1RJA EME event, Echoes of Apollo Aside of the "Pickle dipole" did any one have an idea of their setup? (Amp power and # of beam element) A linear amp and the beam stacking is giving the required ERP on the TX side and the 3db stacking gain seems to make the difference between reception just at the noise level and something above the noise. This EME was a good overall satellite station test. 50 watts and one single beam was too borderline to have a decent 2 way contact but without the real Arecibo ERP TX figures it is hard to say if a setup is below standard equal or above. http://www.youtube.com/watch?v=ZutOfYLPIMY "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE

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N3FJP Amateur Contact Log and LoTW
by Michae J. Wolthuis 22 Apr '10

22 Apr '10

Is anyone else having problems downloading data from LoTW for N3FJP's AC Log?? I have not been able to download data for about 2 weeks. I can upload. I get an error saying: The data file did not complete normally. Please try downloading the file again. I have tried about 25 times. Any ideas? It has been working so well! Mike Kb8zgl

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Balloon launch now!
by Robert Bruninga 21 Apr '10

21 Apr '10

APRS Balloon? I got an email to an anonomyous list about an APRS balloon launch any minute now from Oswego New York. Donno if anyone on APRS or AMSAT also got it, but here is a link to the launch site twitter account: The scientific transport that was launched at 1832 EDT can be tracked at http://aprs.fi/?call=KB3HCY-11 3 minutes ago via web All ? PBH-10, our test flight, was successful and we plan to launch our first mission at 1800 EDT (2200 UTC) 21 April 2010! Be sure to check our Twitter feed <http://www.twitter.com/PBH3> to for the latest updates. PBH-11 ? Duration record VHF(APRS): 144.390 MHz (North American Frequency) APRS Callsign: KB2ZWZ (Kilo-Bravo-Two-Zulu-Whisky-Zulu) Monitor APRS location at <http://aprs.fi/?call=KB2ZWZ> Downlink is on APRS 144.39 and also some HF: HF: 7.1028 MHz (CW) HF Callsign: K2RAM Monitor periodic status transmissions every 10 minutes at :05, :15, :25, :35, :45, :55 UTC Bob, WB4aPR

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CubeSat workshop
by Bryan Klofas 21 Apr '10

21 Apr '10

Hey Everybody-- The CubeSat workshop at Cal Poly is today through Friday. Presentations are being streamed live, and archived for future viewing: http://www.ustream.tv/channel/CubeSatWorkshop/v3 More information: http://cubesat.org/index.php/workshops/upcoming-workshops Thanks! -- Bryan Klofas, KF6ZEO

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