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Re: [amsat-bb] Grids
by Brad Smith 29 Aug '20

29 Aug '20

< but I'm wondering if the marker would be sufficient evidence? Depends who placed it, I suppose?> I live near the intersection of 4 grids. It is in a subdivision. There is a bronze marker placed near the curb, explaining the meaning of the grid lines and longitude and latitude. BUT, the actual intersection is across the street, in someone's front yard, not at the curb, where the plaque is placed. You have to rely on your GPS, or one of several grid mapping programs that you can enlarge and do a print screen. Both will work. I use a hand held GPS for this and also for geocaching. Brad KC9UQR

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Re: [amsat-bb] AO92 1728Z August 28
by Scott Davis 29 Aug '20

29 Aug '20

There’s an active station WB4Z, who is in EM70, so it’s very likely you might have heard “WB4Z…EM…” -Scott K5TA

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Proximity to grid line boundary
by tjschuessler＠verizon.net 29 Aug '20

29 Aug '20

For my information, as I am not much of a rover, but as I may be doing a little local grid rove sometime next weekend by request, how far from a grid boundary can you be for it to count? I found a 4 corners grid boundary in my area, but it is way rural in a deep clump of vegetation with a dirt road a couple hundred feet away. What is the maximum deviation from an X .000000; Y.000000 location for it to be legal as a 4 grid location? I will probably do a much easier 2 grid line location, but just wondering. Thanks much. Tom Schuessler, N5HYP EM12ms

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Re: [amsat-bb] Doppler Tracking Discontinuity at TCA - Problem Solved
by Hasan N0AN 29 Aug '20

29 Aug '20

Gerald, https://www.sdr-radio.com/download ...and I listed the program by name in my prior message and when I googled that name I got several listings like the url post immediately above. Did google not work for you? You might find this particularly interesting where the options in the satellite pane of the software are discussed. https://www.sdr-radio.com/options It is free, for amateurs, btw. 73, N0AN Hasan On Sat, Aug 29, 2020 at 1:38 PM Gerald Payton <gp_ab5r(a)outlook.com> wrote: > Is this program TOP SECRET or can anyone look at it? I'm new and trying > to soak in these things. But just talking about it and not supplying a URL > does not help. > > 73, > Jerry AB5R > > ------------------------------ > *From:* AMSAT-BB <amsat-bb-bounces(a)amsat.org> on behalf of Hasan N0AN via > AMSAT-BB <amsat-bb(a)amsat.org> > *Sent:* Saturday, August 29, 2020 1:15 PM > *To:* Bruce Perens <bruce(a)perens.com> > *Cc:* AMSAT-BB <amsat-bb(a)amsat.org> > *Subject:* Re: [amsat-bb] Doppler Tracking Discontinuity at TCA - Problem > Solved > > Hi Bruce, > I'm sure it should be error trapped when an absolutely crazy value is > input, but I'm not pointing the finger at any programmer, when I, in fact, > input the wrong, really wrong, value. > > I'm just glad I found it and now doppler tracking is perfectly even on an > 89 degree overhead pass. > > Considering all the things done right in the software, way beyond any other > program I've seen, I'm not going to complain. > > The program auto-schedules, tracks, prioritizes and presents for decoding > AO-73, EO-88, JO-97, AO-91 and AO-92, with no operator intervention > whatsoever. Any number of birds can be added or deleted. > > I can let it run overnight and come down and see every bird's TLM perfectly > decoded. > > If I chose to, I could have it IQ record every pass and go back and decode > it again later. > > The program is absolutely amazing. The fact that it accepted a ridiculous > input value from me without warning me, is to my way of thinking, small > potatoes. :-) > > (SDR-Radio Console v 3.x ) > > 5 EL Yagi > 60' Hardline > Duplexer > ARR GasFET > Funcube Pro+ SDR > > SDRConsole v3 > > Rotor control by SDRC > PSTrotator > 15 deg uptilt yagi (5 EL on 2m, 8 EL on 70cm, interlaced, common feedpoint) > > Anyone using an SDR that has not used SDRC for controlling it, for > satellite work, has no idea how enriching an SDR setup with good software > can be. > > 73, N0AN > Hasan > > > On Sat, Aug 29, 2020 at 12:52 PM Bruce Perens <bruce(a)perens.com> wrote: > > > It's a software bug when the software quietly accepts an impossible > > parameter. > > > > On Sat, Aug 29, 2020, 6:17 AM Hasan N0AN via AMSAT-BB < > amsat-bb(a)amsat.org> > > wrote: > > > >> Over the last week or two, I have been getting a 200 Hz discontinuity > jump > >> in my uplink frequency at TCA (Time of Closest Approach), also known as > >> the > >> zero doppler point. This happened on every bird, every pass. (all mode > B, > >> 70cm up, 2m down) > >> > >> AOS was early, LOS was late, and doppler tracking was non-linear and had > >> the bad jump at TCA. > >> > >> Today, thanks to K5GZR and KB7IJ, the problem source was identified and > >> corrected. > >> > >> It was caused by a terrible error in the definition of my Home > Altitude. I > >> typed in, 350 meters. The program took it 35,000 meters. > >> > >> I corrected it and now doppler tracking in SDRC v3.x is perfect. > >> > >> If anyone else ever gets a set of symptoms like mine, take a look at > your > >> Home QTH altitude setting. Being off by a factor of 100:1 makes a > >> difference. > >> > >> 73, N0AN > >> > >> Hasan > >> _______________________________________________ > >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > >> to all interested persons worldwide without requiring membership. > >> Opinions expressed > >> are solely those of the author, and do not reflect the official views of > >> AMSAT-NA. > >> Not an AMSAT-NA member? Join now to support the amateur satellite > program! > >> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb > >> > > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official views of > AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb >

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Re: [amsat-bb] AMSAT-BB Digest, Vol 15, Issue 357
by Douglas Tabor 29 Aug '20

29 Aug '20

At long last, a BB digest with News you can Use. 73 and everyone have a great weekend! Doug, N6UA DN71qd Douglas Tabor dtabor52(a)gmail.com

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AO92 1728Z August 28
by John Geiger 29 Aug '20

29 Aug '20

Who was the WB4Z station on yesterday's AO92 pass at 1728Z? He called me a couple of times and I finally worked him. I had it written down as WB4ZEM but that call is not coming up in QRZ.COM or on the FCC's website so it must be something else. 73 John AF5CC

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VUCC in the books
by Russ Kinner 29 Aug '20

29 Aug '20

I have with the latest LotW update yesterday exceeded 125 grids and have applied to the ARRL for the VUCC Satellite certificate with the 125 sticker. Thanks to all the rovers such as AD0HJ, WY7AA, WD9EWK, N6DNM, K5ZM, N7EGY and many others. Now it's time to get out there myself so I'm planning a short trip to adjacent grids to get some of the lesser occupied AZ grids on the air. It Will be FM only to begin with until I can upgrade my rig but maybe I can be someone's grid hero in a few months.I For 6 months since my first contact post retirement, it's been loads of fun (and occasionally frustrating getting my signal in to the bird). Made contacts even on AO-27! Rusty, WA8ZID

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FW: G5400 rotator position pot.
by Gary 29 Aug '20

29 Aug '20

I was unable to reply directly. -----Original Message----- From: Gary Sent: Saturday, August 29, 2020 11:43 AM To: Tom Lubbers K8TL <k8tl(a)earthlink.net> Subject: RE: [amsat-bb] G5400 rotator position pot. Tom, I hate emails that don't answer the questioned asked, but find myself doing it anyway. When I had a 5400 I was able to repair the pot. There used to be a wire that twisted as the pot turned. This wire liked to fail from repeated twisting. You may want to try replacing it. 73, Gary kk0sd -----Original Message----- From: AMSAT-BB <amsat-bb-bounces(a)amsat.org> On Behalf Of Tom Lubbers K8TL via AMSAT-BB Sent: Saturday, August 29, 2020 11:09 AM To: AMSAT BB <amsat-bb(a)amsat.org> Subject: [amsat-bb] G5400 rotator position pot. Anyone know a source or a replacement pot for the Yaesu G5400 azimuth rotor. That's the 500 ohm pot that measures the position. Tom K8TL _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb

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G5400 rotator position pot.
by Tom Lubbers K8TL 29 Aug '20

29 Aug '20

Anyone know a source or a replacement pot for the Yaesu G5400 azimuth rotor. That's the 500 ohm pot that measures the position. Tom K8TL

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Noise Blanker in FM
by John Geiger 29 Aug '20

29 Aug '20

Does anyone on the list know of any satellite radios or 2 meter radios that have a noise blanker that functions in FM mode? I am getting some bad noise to my north and northeast that is interfering with the FM sats, so am looking for a rig that can help with this. 73 John AF5CC

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