April 2011 - AMSAT-BB - mailman.amsat.org

searching advice on low hpass filter for 146 MHz
by Werner Kullmann, HB9BNK 10 May '11

10 May '11

To improve the reception of the sats on 145.9xx MHz with my little yagi, I recently acquired a SSB-preamplifier SP-2000. To my dismay, the reception on my IC910H was intermittend heavily distorted. After a while I found, that a nearby located commercial transmitter (POCSAG) emitting bursts on 147.300 is so strong, that the frontend of the IC910H (or its AGC) practically quites the receiver on 145.900. When the bursts stop, reception resumes. Difficult to qso. I have experimented with a large cavity filter and found, that the impact of the bursts can be reduced, so that normal satellite work is possible again. Now I am looking for advice on how to build a steep low pass filter, eliminating everything above 146 MHz, to be mounted before the preamp on the mast. The filter must however be capable to accept the rf power, if I work in V/U mode. Thank you for any ideas ! Werner, HB9BNK

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Re: KD8KSN Active Tomorrow (4/30) for Boy Scout Demo
by Zachary Beougher 30 Apr '11

30 Apr '11

Hi Everyone, Thanks for the QSOs during my portable operation today. It was probably the hardest portable operation I have done so far, as I am sure some of you heard the plane that kept buzzing around every time I would transmit... ;-) I can't exactly say what was causing that horrible "buzz" every time I would transmit, but I do know that Horns Hill (where I was operating from) has three towers with cell, amateur, police and fire repeaters on them. I could barely hear my downlink through the buzz, and the trees really complicated it as well. The first AO27 and AO51 passes were okay with a few QSOs made, but we decided to just monitor the last AO27. I heard at least one station call on the 1957z AO27 pass, but I did not feel comfortable transmitting. Everyone just enjoyed listening - especially to that pass. Everyone enjoyed hearing WD9EWK and KF7MYK on the west coast along with CO6CBF in Cuba and VE3JW in Canada. I was able to log all of the QSO from the first AO27 pass, but I do need the 1942z AO51 recording. I had to sacrifice my recorder jack for an external speaker. If someone could email that to me I would greatly appreciate it! If EN80 was new for anyone, let me know and I will send one of my regular cards - no return/sase needed. Thank you to the gracious ops today who put up with the noise! 73! Zack KD8KSN -----Original Message----- From: Zachary Beougher Sent: Friday, April 29, 2011 9:25 AM To: amsat-bb(a)amsat.org Subject: KD8KSN Active Tomorrow (4/30) for Boy Scout Demo Hi All, I have been asked to do a few satellite demos for some Boy Scouts tomorrow afternoon on Horn’s Hill, Newark Ohio. The location sits about 400-500’ above the rest of the terrain which is great for low passes, but there are several trees to contend with. It would be great if a few people could call so the scouts could hear a typical exchange, and it would be really great if whoever calls could give their state as well. Here are the passes I plan to be on: AO27 30/1817z 50* AO51 30/1942z 15* Maybe... AO27 30/1957z 19* I will be operating with my usual call, or I might be operating using W8CBF. Grid will still be EN80. We will also be on HF: JOTA Scout Frequencies > > Band > > 80-meter > 3.940 MHz > > 40-meter > 7.190 MHz > > 20-meter > 14.290 MHz > > 10-meter > 28.390 MHz Sorry I can't provide more details about the event. I believe there were a few organizational issues. The passes and HF ops will be dependent on who all shows up, band conditions and weather. There are supposedly 400-500 scouts that will be coming through. If you would like a card, send me the QSO details and I will send you one - no return necessary. 73! Zack KD8KSN

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Re: Send Your Name to Mars
by Bob- W7LRD 30 Apr '11

30 Apr '11

Hey Mark-What would the suggested ERP be? I can only imagine someday way in the future this may not be a joke! just dreaming 73 Bob W7LRD/M ars ----- Original Message ----- From: "Mark L. Hammond" <marklhammond(a)gmail.com> To: "Clint Bradford" <clintbradford(a)mac.com>, amsat-bb(a)amsat.org Sent: Saturday, April 30, 2011 9:46:12 AM Subject: [amsat-bb] Re: Send Your Name to Mars Or just point your array at Mars and send it in CW....it'll get there faster :) 73, Mark N8MH At 08:59 AM 4/30/2011 -0700, you wrote: >Place you name/call on a chip that will be sent to Mars later this year. > >http://marsparticipate.jpl.nasa.gov/msl/participate/sendyourname/ > >_______________________________________________ >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 _______________________________________________ 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

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Send Your Name to Mars
by Clint Bradford 30 Apr '11

30 Apr '11

Place you name/call on a chip that will be sent to Mars later this year. http://marsparticipate.jpl.nasa.gov/msl/participate/sendyourname/

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MR0DQO event summary
by Chris Bloy 30 Apr '11

30 Apr '11

Hi All, Thank you to all the stations that took part in the Royal Wedding special events station yesterday and we are pleased with the number of stations calling us! However we believe we missed some of you as the recording is hard to pick out your callsigns! Please contact me if you worked us as we would be happy to add you to our list! Below is a summary link to our website: http://wordpress.projectoscar.co.uk/#/?p=628 Many thanks, Chris - M0DQO (MR0DQO) Founder of Project OSCAR UK Sent from my iPhone

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XF2P EM11??
by John Papay 29 Apr '11

29 Apr '11

The DX Cluster has a spot for XF2P saying that the operation was cancelled due to bad weather. Can anyone provide any information about this? 73, John K8YSE

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Re: XF2P EM11??
by Rafael Valdez G. 29 Apr '11

29 Apr '11

The operation was cancelled, however be aware that XE1AY will be conducting satellite operations from rare grids nearby. 73 de XE2RV @ DM41mh -----Original Message----- From: John Papay <john(a)papays.com> Date: Sat, 30 Apr 2011 01:01:56 To: <amsat-bb(a)amsat.org> Subject: [amsat-bb] XF2P EM11?? The DX Cluster has a spot for XF2P saying that the operation was cancelled due to bad weather. Can anyone provide any information about this? 73, John K8YSE _______________________________________________ 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

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Enterprise launch
by Robert McGwier 29 Apr '11

29 Apr '11

SCRUBBED for Friday

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Re: New Sat Operators
by Clint Bradford 29 Apr '11

29 Apr '11

>> ... gud luck FM birds are very over crowded. SSB birds would be alot better I hope you told them what to expect ... I live in the most populous region of the U.S.' most populous state, and have never had a problem demo'ing in front of audiences. Of course it is busy on the "prime time" passes. That's why they exist - for us to use them. I hope your comment was just tongue-in-cheek ... (grin) Clint, K6LCS http://www.work-sat.com

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Re: Icom D-Star
by Clint Bradford 29 Apr '11

29 Apr '11

>> ... They shouldn't be allowed to sell them for use on the amateur bands. Aren't secret codes illegal? I didn't know that the transmission of one's callsign and GPS coordinates was illegal ... And of course it isn't. >> ... it's not really amateur radio ... It seems you do not like this mode of operation. But to demean it by tossing in hints of it being universally "illegal" is an irresponsible and immature tactic, IHMO. Clint Bradford, K6LCS http://www.k6lcs.com ---------------------------------- Clint Bradford, K6LCS http://www.clintbradford.com

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