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Fwd: Re: S band interference solution
by Nate Duehr 05 Oct '06

05 Oct '06

Begin forwarded message: > From: Nate Duehr <nate(a)natetech.com> > Date: October 5, 2006 12:36:38 PM MDT > To: k8ocl(a)arrl.net > Subject: Re: [amsat-bb] Re: S band interference solution > > On Oct 5, 2006, at 11:40 AM, John Champa wrote: >> Nate, >> >> I am happy to report that I get along with my neighbors very well, >> thank you, >> so none of these TVI-type suggestions were any problem whatsoever >> at this QTH. >> >> Have you ever read any texts from the ARRL, etc. on how to manage >> a TVI problem? >> They are not as popular as they once were, but you can still find >> them around. >> >> They will help you in the social skills areas, another big weak >> point for most Hams. >> >> 73, John > > John, > > You completely misread my comments. I do just fine with social > skills and know the neighbors. > > What I *don't* want is to become the neighbor's "tech support" guy > by having a conversation with them about 2.4 interference or > "helping" them with their router. They don't know I can fix their > routers, computers, whatever... and I'd pretty much like to keep it > that way. > > I didn't make any TVI suggestions at all. Not sure where you got > that from. > > I was just (humorously) pointing out that: > > Being forced to deal with interference that's built-into the band- > plan given us by the FCC if 2.4 is flown brings added complexity > and time necessary that many hams will simply avoid. Not because > the technical details of hunting down low-power interference > sources is difficult, but because you have to go pester the > neighbors, ultimately leading to a number of other complex problems > completely unrelated to ham radio. > > For someone who just wants to get on and operate, finding out they > have to first hunt down local interference in the neighborhood will > simply mean they don't operate at all. > > I'm not the "just want to operate" type, but I certainly don't want > to involve myself in the nightmare that is known as my neighbor's > home computers. I do computers and networking and > telecommunications for a living -- fixing someone's (permanently) > broken Windows box, isn't my idea of fun, interesting, or even > slightly amusing anymore. Unless someone wants to pay me my usual > overtime rate for it. > > Walking next door to futz with the neighbor's 802.11 devices opens > me up to that. > > Currently I can "hear" six 802.11 devices from my back porch in a > suburban area without a gain antenna, using the built-in antenna on > my laptop. And those are the ones that are broadcasting an SSID, > and of course this doesn't include cordless phones. 900 MHz ham > is similarly trashed by various unlicensed "household electronic > stuff" I'm not going to bother hunting down. > > It's not getting any better where I live, and I'm in Denver. And > in places where housing is more compact... it must be far worse by > now. > > Nate WY0X > > -- > Nate Duehr > nate(a)natetech.com > > > -- Nate Duehr wy0x(a)mac.com

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HITSAT 1812 UTC
by Mike Rupprecht 05 Oct '06

05 Oct '06

AOS 1812 UTC Oct 05 (JN49lr) Hit2 .....105634 Hit3 344d50494f4a494d Hit4 c1d2d2e2 Hit1 jr8yjt Hit2 a0603145127 Hit3 554a51494f4b4a4e Hit4 ...1d1e2 LOS 1819 UTC used OBJECT F (NORAD #29484)

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Re: S band interference solution
by John Champa 05 Oct '06

05 Oct '06

Nate, I am happy to report that I get along with my neighbors very well, thank you, so none of these TVI-type suggestions were any problem whatsoever at this QTH. Have you ever read any texts from the ARRL, etc. on how to manage a TVI problem? They are not as popular as they once were, but you can still find them around. They will help you in the social skills areas, another big weak point for most Hams. 73, John >From: Nate Duehr <nate(a)natetech.com> >To: AMSAT-BB(a)amsat.org >Subject: [amsat-bb] Re: S band interference solution >Date: Thu, 05 Oct 2006 10:39:00 -0600 > >John Champa wrote: > > I really do get bored reading about all these threats to Mode S from >WiFi, > > etc. > > > > NOT! > > > > These are 100 mW devices...maximum! That means they have to be >relatively > > close to your QTH for you to hear them. > >I've got one here that will happily do 250mW all day long... not that I >run it that way. All it took was some alternate firmware to bypass the >normal firmware's limits. However, 28mW is plenty to cover my house. > > > 1. Pick up your old laptop, or borrow one. > > 2. Plug in a Linksys wireless PC card from Radio Shack. > > 3. Download the free NetStumbler shareware. > > 4. Find the source of the Wifi QRM. > >4a. Explain to the nice Sheriff's deputy why you're walking around the >neighborhood and into neighbor's yards with a laptop. > >4b. Call your wife and ask her to come pick you up from jail. Explain >to wife on the way home that you're not a "terrorist" as the Sheriff's >summons for your later court date indicates. > > > 5. Knock on his door and ask him to change his AP to a channel 7 - 11 > > (outside the Ham Band) > >5a. Listen to 1/2 hour tirade about how this guy bought the thing at the >local Best Buy and they never told him about the ham band, and how he >saw a UFO fly past your tower one night. > >5b. Another 15-30 minutes talking about "What's that tower for, anyway?" > >5c. Spent an hour in his basement with him, helping him click on simple >web interfaces after you reset his router to a default password and have >to set it up from scratch because he's forgotten his password... which >turns out to be "beerrules" and is found on a Post-It note on the bottom >of the router AFTER you've already reset it to factory defaults. > > > 6. Reason: He's interfering with a licensed radio service (be nice!). > >6a. If you were dumb enough to point this out to Joe Sixpack, expect >another 1/2 hour explaining Part 15. If you're lucky, Joe will offer >you a beer at this point. > >6b. If you're *REAL* lucky he might be interested in ham radio. (This >is about the only good that can come of this.) Spend another hour today >and many more Elmering. (Yay!) > > > 7. Return to your radio room and operate Mode S until LOS. > >7a. The satellite passed over long ago and it's time for bed anyway. > >7b. Alternatively Joe may have you "help me fix my computer while you're >here", and you'll spend at least one weekend a month at the neighbor's >house or another neighbor's house (once word gets around) dealing with >their computer problems, virii, and other technical duties now that >you're the "friendly computer guy in the big white house over there!" > > > This is child's play guys! These are consumer grade wireless devices, >not > > super computers. > > Fixing such local QRM issues is easier than solving the old fashioned >TVI > > problems. > >No. The average public at least understood how their TV worked, or at >least how to adjust a pair of rabbit ears. WiFi is "deep voodoo black >magic" to the vast majority of the population in most neighborhoods >today. They think they paid for a system that works perfectly, 100% of >the time and they have their own "channel". Some have heard enough to >turn on the WEP encryption in their routers (crackable, easily). > >(Heck I've seen Engineers where I work stare and boggle at a simple >Radio Frequency Spectrum chart, like the one you can download and print >out from the NTIA. They always ask: "So where's my cell phone on here?") > > > The most troublesome devices I have found , even to WiFi, are 2.4 GHz > > cordless phones. > > In that case the only solution I have found is to go next door and offer >to > > buy him a replacement > > cordless phone of any type he would like EXCEPT one on 2.4 GHz. That is >a > > cheap > > solution. They're usually not more than $79.95 while you probably have > > multiple Ks of $ > > invested in your satellite ground station. > >Yeah - move 'em up to 5.8 GHz! Oh... wait... > >Maybe down to 900 MHz... Oh, oops... some of us are there too... hmmmm... > > > For a bunch of supposedly sophisticated wireless guys, you sure don't >know > > beans about > > consumer grade wireless devices. That includes our wonderfully >dedicated > > but pessimistic AMSAT satellite engineers! > >I know plenty about them and know I'll end up the neighborhood tech >support guy for them if I even THINK about talking to a neighbor about >them. That and their utterly broken Windows 98 machines they THINK they >need. Thanks to mass marketing... "Your child will be smarter if you >buy them our operating system!" (No, it has nothing to do with genetics >or the fact there isn't a single book in the house!) > > > Now get on with the work, and get those birds into orbit! (HI). > >Ditto on that, at least! :-) > > > Vy 73, > > John Champa, K8OCL > > AMSAT Life Member 1069 > >Nate WY0X >_______________________________________________ >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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HITSAT 1638 UTC
by Mike Rupprecht 05 Oct '06

05 Oct '06

AOS 1638 UTC Oct 05 (JN49lr) Hit1 jr8yjt Hit2 a0601365038 Hit3 374d524c504a484c Hit4 c1d1d1b8 Hit1 jr8yjt Hit2 a0601404726 Hit3 0e4d504b4e4b4a4a Hit4 c1d2d2e2 Hit1 jr8yjt LOS 1647 UTC used OBJECT F (NORAD #29484) ------------------------------------------------------------------------ -------- Date: Oct, 06 Time: 01:40:47 JST HIT2 a0601404726 HIT3 0e4d504b4e4b4a4a HIT4 c1d2d2e2 Temp +X face : 181,310 °C Temp -X face : 29,975 °C Temp +Y face : 22,769 °C Temp -Y face : 34,779 °C Temp +Z face : 27,573 °C Temp -Z face : 34,779 °C Temp Transceiver: 37,181 °C Temp Battery : 37,181 °C Prim. Battery : 7,539 V Sec. Battery : 8,203 V 5 Volts : 4,974 V 5.5 Volts : 5,353 V RSSI : 0,742 V 73, Mike DK3WN

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HITSAT 1509 UTC
by Mike Rupprecht 05 Oct '06

05 Oct '06

AOS 1509 UTC Oct 05 (JN49lr) Hit2 a060006333c Hit3 3c4b52484e4b4a4d Hit4 c1d2d1e2 LOS 1511 UTC used OBJECT F (NORAD #29484) ------------------------------------------------------------------------ -------- Date: Oct, 06 Time: 00:06:33 JST HIT2 a060006333c HIT3 3c4b52484e4b4a4d HIT4 c1d2d1e2 Temp +X face : 70,811 °C Temp -X face : 34,779 °C Temp +Y face : 17,964 °C Temp -Y face : 41,986 °C Temp +Z face : 27,573 °C Temp -Z face : 34,779 °C Temp Transceiver: 37,181 °C Temp Battery : 29,975 °C Prim. Battery : 7,539 V Sec. Battery : 8,203 V 5 Volts : 4,951 V 5.5 Volts : 5,353 V RSSI : 1,172 V 73, Mike DK3WN

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Re: AMSAT-BB Digest, Vol 1, Issue 171
by Reicher, James 05 Oct '06

05 Oct '06

John, If the bird is in range and it's daylight at your location, then the satellite is also in daylight. If any part of it's footprint is in daylight, the satellite is sunlit. I would assume that at 11:58 your local time (9:58 UTC), that you are experiencing daylight. 73 de N8AU, Jim in Raymore, MO Date: Thu, 05 Oct 2006 12:42:49 +0200 From: "john hackett" <la2qaa(a)hotmail.com> Subject: [amsat-bb] ... Err!, an observation. To: Amsat-bb(a)amsat.org Cc: jking(a)eclipticenterprises.com, allan_gm1sxx(a)hotmail.com, n1did(a)amsat.org, k3szh(a)netzero.net, eu-amsat(a)yahoogroups.com Message-ID: <BAY105-F25F9CF026C72E2230A562C81120(a)phx.gbl> Content-Type: text/plain; format=flowed Hello Folks, As we all know (or assumed), AO-7's battery system has been down the tube for a couple of decades. However, this morning I got quite a surprise. I always monitor the old girl before actually *bellowing* into the microphone. As is my want, I was watching both InstantTRACK and NOVA on seperate computers (and before you comment, my keps are! correct and up to date). The satellite came up over Northern Russia at 09:58 UTC on the 45926 orbit and was in complete darkness at that time but just for a laugh I sent a few CQ's on CW (432.150 up 145.941 down) and to my surprise I copied LA2QAA calling CQ - (that's me folks). Thinks ... "This can't be, the batteries are knackered". This instigated careful checks of time (Atomtime Pro), keps & doppler - no doubt - (both InstantTRACK and Nova agreed) - AO-7 was in darkness but I was able to copy my downlink at S3. A few minutes later, when the old girl came into sunlight my signal shot up to S8. Careful checks of my hearing and senility confirmed that both are! functioning correctly. So ... how come I could hear myself when AO-7 was in darkness?. As can be imagined, I will keep tabs on this tomorrow morning. Sensible explanations please written on the back of a clean $100 bill wrapped round a wallbrick and chucked through my window - or - an e-mail to <la2qaa(a)amsat.org> at a pinch, will suffice 73 John. ------------------------------ _______________________________________________ Sent via amsat-bb(a)amsat.org. Opinions expressed are those of the author. Not an AMSAT member? Join now to support the amateur satellite program! http://amsat.org/mailman/listinfo/amsat-bb End of AMSAT-BB Digest, Vol 1, Issue 171 ****************************************

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HITSAT - Object J
by Colin Hurst 05 Oct '06

05 Oct '06

Over the last two days I have concluded that HITSAT is more likely to be Object J, than Object B. Using Object J, I am able to hold the CW tone, to +/- 100 Hertz, using homebrew software that updates the RX every 1 second. Colin VK5HI.

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Re: HITSAT - Object J
by Mike Rupprecht 05 Oct '06

05 Oct '06

Hi Colin, do you mean really OBJECT J (NORAD 29491)? Between OBJECT B (29480) and OBJECT J is a time difference of 27 minutes. I can hear HITSAT from AOS to LOS with OBJECT B. But a correction of -1KHz in CW Mode (FT-736R with small filters) is necessary. A second question: the RCS of OBJECT B is 9.0. That seems to me for a Cubesat much too largely. 73, Mike DK3WN ----- original Nachricht -------- Betreff: [amsat-bb] HITSAT - Object J Gesendet: Do, 05. Okt 2006 Von: "Colin Hurst" <cjhurst(a)bigpond.net.au> > Over the last two days I have concluded that HITSAT is more likely to be > Object J, than Object B. > Using Object J, I am able to hold the CW tone, to +/- 100 Hertz, using > homebrew software that updates the RX every 1 second. > Colin VK5HI. > > _______________________________________________ > 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 > --- original Nachricht Ende ----

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Another Source of 2.4 GHz Interference ?
by Trevor 05 Oct '06

05 Oct '06

Nokia have announced a new short-range wireless technology called Wibree, see http://news.bbc.co.uk/1/hi/technology/5403564.stm It's claimed it can be used in intelligent jewelry, watches as well as more conventional applications. No information on the frequencies used is given in the press release but I'm presuming it's 2.4 GHz. 73 Trevor M5AKA --------------- Daily Amateur Radio RSS News: http://www.southgatearc.org/ Email your news items to: editor at southgatearc.org News On Your Website: http://www.southgatearc.org/rss/index.htm News On Your PC: http://www.southgatearc.org/rss/newsreader.htm Upload Your News: http://www.southgatearc.org/news/your_news.htm --------------- ___________________________________________________________ Copy addresses and emails from any email account to Yahoo! Mail - quick, easy and free. http://uk.docs.yahoo.com/trueswitch2.html

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S band interference solution
by Luc Leblanc VE2DWE 05 Oct '06

05 Oct '06

Anyone interrrested in give it a try go on : http://www.antennasystems.com/cellular.html The ultimate solution... "-" The medium is the message...The content is the audience...;) Luc Leblanc VE2DWE WAC basic,CW,Phone,Satellite Skype VE2DWE www.qsl.net/ve2dwe

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