- AMSAT-BB - mailman.amsat.org

Re: [amsat-bb] beepbeepbeepboopboopboopbeepbeepbeep
by Roy Dean 28 Jul '20

28 Jul '20

Ok, answered my own question: https://network.satnogs.org/observations/2615366/ Not just me. --Roy K3RLD > Anybody else hear this on the 16:00z pass of AO-92 that is finishing up > right now? Or is it my SDR? (didn't hear it on the AO-91 pass immediate > before this AO-92 pass). > > --Roy > K3RLD > >

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beepbeepbeepboopboopboopbeepbeepbeep
by Roy Dean 28 Jul '20

28 Jul '20

Anybody else hear this on the 16:00z pass of AO-92 that is finishing up right now? Or is it my SDR? (didn't hear it on the AO-91 pass immediate before this AO-92 pass). --Roy K3RLD

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Re: [amsat-bb] Signal to Noise ratio
by Mike Seguin 28 Jul '20

28 Jul '20

And here's a short text from Ian, GM3SEK about adjusting preamp gain. No test equipment needed. Too much gain can be a bad thing... ==== Here's a method that requires no test equipment at all. It comes from G4DGU, who designed all the original muTek transverters and outboard preamps to have adjustable gain. This method uses the sharp threshold effect of FM detectors at low S/N ratios, and it allows you to optimize the preamp/transverter gain for your local band noise conditions. 1. Turn the transverter/preamp gain well up. 2. Find a very weak but steady unmodulated carrier (off-air, not from a signal generator or a local birdie). Rotate the antenna until you can just detect the signal in FM mode. 3. Reduce the preamp/transverter gain until you hear the noise increase. The FM threshold is sensitive to a small fraction of a dB in S/N. 4. Increase the gain just a little,to the point where you can't hear the quieting improve much. 5. Switch back to a real DX mode. Remember that every dB of unnecessary preamp/transverter gain will probably subtract almost 1dB from your system intermod intercept! The penalty of adjusting the gain correctly is that you're living just above the "knee" where S/N will begin to deteriorate rapidly if something changes. It's worthwhile to repeat this test every few months - especially just before a contest. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) On 7/28/2020 9:28 AM, Leffke, Zachary via AMSAT-BB wrote: > An EXCELLENT topic of conversation, and one I keep circling back to over and over and over....... > > -Zach, KJ4QLP -- 73, Mike, N1JEZ "A closed mouth gathers no feet"

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Turning on a light
by Michael Tondee 28 Jul '20

28 Jul '20

The AMSAT membership has obviously long been in the dark about how the organization operates and what's involved in the finances and various decision making processes. Michelle and Patrick are trying to turn on a light and get some clarity and transparency. Despite the rancor it's caused and the fact that it's painful, it's becoming more and more undeniable how necessary it was and I fail to see how it's a bad thing. I'd love to go back to discussing satellites too but sometimes you have to go through the bad to get to the good. That's life. 73, Michael, W4HIJ

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Re: [amsat-bb] Searching AMSAT Archives Using Google 'Site:' Tool
by Clint Bradford 28 Jul '20

28 Jul '20

Hmmm ... never tried that. List messages are included in regular Google searches - but I am not sure if the more current years are included, or just the ones on the “old system” are being searched. Clint Bradford K6LCS Sent from my iPhone

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Signal to Noise ratio
by Albert Ozias 27 Jul '20

27 Jul '20

Do preamps improve the signal to noise ratio or simply amplify signal and noise?

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Re: [amsat-bb] Easy and FUN Antenna Projects
by Roy Dean 27 Jul '20

27 Jul '20

Ok, Clint. Then I'll call it as I see it: Please stop clogging the internet with your personal web page propaganda. --Roy K3RLD > Roy Dean: > > You need a little education. > > “Spam” is irrelevant or inappropriate messages sent indiscriminately to all audiences. > > “Advertising” is the activity or profession of producing ads for commercial products or services. > > What do I offer on my Web site? Information. Free-of-charge. No product nor service that > benefits me personally. > > SO … What I did - post ANTENNA PROJECTS to groups entitled “antennas,” “satellites,” and > “DIY Projects” is really quite an appropriate use of the ‘Net. No spam. Target audiences. > > Clint Bradford K6LCS > >

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(no subject)
by Jim Davis 27 Jul '20

27 Jul '20

Department of Redundancy Dept.

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AMSAT Awards Update
by Bruce 27 Jul '20

27 Jul '20

Here are the awards issued in the last two months. AMSAT Satellite Communicators Award for making their first satellite QSO Anthony Rizi, NR1Z Edward Hartzel, W3HMK James Brooks, KB3EFH Vilanova University ARC, W3YP Robin Shelley, G8VVY ------ AMSAT Communications Achievement Award Anthony Rizi, NR1Z, #628 Angus Alexander, KJ7KOJ, #629 ------ AMSAT Sexagesimal Satellite Communications Achievement Award Stephan Greene, KS1G, #187 Casey Tucker, KI7UNJ, #188 ------ AMSAT South Africa Satellite Communications Achievement Award Anthony Rizi, NR1Z, #US230 Casey Tucker, KI7UNJ, #US231 Angus Alexander, KJ7KOJ, #US232 ------ AMSAT Robert W. Barbee Jr., W4AMI Award (1,000-4,000) Mitchell Whitman, N4DCW, #110 Mark Johns, K0JM, #111 David Hoffman, KL1XI, #112 Phillip Sauvey, AK7DD, #113 Dennis Love, N7EGY, #114 Kell Bodholt, KI7UXT, upgrade to 2000 ------ AMSAT Rover Award Rover Call ===== ======== #054 N0TEL #055 AK7DD #056 KE0WPA ------ GridMaster Award GridMaster Call ========== ======== #11 KO4MA #12 N4UFO #13 W5CBF To see all the awards visit http://www.amsat.org and click on Services then Awards. 73...bruce -- Bruce Paige, KK5DO AMSAT Director Contests and Awards AMSAT Board Member 2016-2020 ARRL Awards Field Checker (WAS, 5BWAS, VUCC), VE Houston AMSAT Net - Wed 0100z on Echolink - Conference *AMSAT* Also live streaming MP3 at http://www.amsatnet.com Podcast at http://www.amsatnet.com/podcast.xml or iTunes Latest satellite news on the ARRL Audio News http://www.arrl.org AMSAT on Twitter http://www.twitter.com/amsat

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Sorry to Leave...Let Me Know When the BS is Done
by Dino Papas 27 Jul '20

27 Jul '20

Can someone let me know when all the political diatribe is done with so I can resubscribe to the mail list and just hear about satellites? TNX! Dino KLØS

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