This is an update on the ARISSat activities. We had a telecon with the ARISSat team in Russia. Here is the situation as described by them. The Russian suit battery that was intended to be used on ARISSat was used during testing both on the ground and onboard ISS when it first arrived. When it was tested prior to the planned April 12 operation, it was discovered that the battery was low on charge. The suit battery's are specified for only five cycles of charge. It was decided to not recharge the battery at this time in order to keep the number of cycles as low as possible and thus saving the battery for the actual mission. That deployment is currently scheduled for July 26. We are still trying to get more information on the storage status and the battery health from the Russian team. We will keep you informed as we prepare for the eventual deployment of ARISSat.
Lou McFadin W5DID ARISS US Hardware manager On Apr 21, 2011, at 10:29 AM, amsat-bb-requ...@amsat.org wrote: > Send AMSAT-BB mailing list submissions to > amsat-bb@amsat.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://amsat.org/mailman/listinfo/amsat-bb > or, via email, send a message with subject or body 'help' to > amsat-bb-requ...@amsat.org > > You can reach the person managing the list at > amsat-bb-ow...@amsat.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of AMSAT-BB digest..." > > > Today's Topics: > > 1. 51 on, then off again (Andrew Glasbrenner) > 2. Re: 51 on, then off again (CA3SOC Raul Romero) > 3. Re: 51 on, then off again (Ted) > 4. Re: 51 on, then off again (Andrew Glasbrenner) > 5. Fwd: ARLS006 Transatlantic Amateur Radio Balloon Launch > (Stuart Balanger) > 6. Re: HF Satellite Experiment? (hi Z) (i8cvs) > 7. Element Corrosion (Clint Bradford) > 8. Re: Element Corrosion (Clint Bradford) > 9. Looking for Yaesu azimuth/elevation Rotors (Frank Viggiano) > 10. ICOM Giving Away D-Star Repeaters (Clint Bradford) > 11. Balloon across Atlantic delayed to 27/29 apr (Bob Bruninga) > 12. STS-134 (Bobby Lacey) > 13. Re: STS-134 (Tom Williams) > 14. AO-51 now requires 67 Hz PL tone; activity reports > appreciated (Mark L. Hammond) > 15. CO6CBF from EL92 QRV tomorrow on AO7 mode A > (hmarti...@ucf.edu.cu) > 16. Re: AO-51 now requires 67 Hz PL tone; activity reports > appreciated (Eric Knaps, ON4HF) > 17. Re: [ao51-modes] Re: AO-51 now requires 67 Hz PL tone; > activity reports appreciated (Andrew Glasbrenner) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 20 Apr 2011 13:06:00 -0400 (GMT-04:00) > From: Andrew Glasbrenner <glasbren...@mindspring.com> > Subject: [amsat-bb] 51 on, then off again > To: amsat-bb <amsat-bb@amsat.org> > Message-ID: > > <19826895.1303319160942.javamail.r...@elwamui-ovcar.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > I turned AO-51 back on, and tried to turn the PL system on unsuccessfully > before the end of the pass. Sorry about that, I'll get it on on the next > pass. Get your 67Hz PL tone programmed back in! > > 73, Drew KO4MA > > > > > ------------------------------ > > Message: 2 > Date: Wed, 20 Apr 2011 18:08:23 -0300 > From: "CA3SOC Raul Romero" <ce3...@gmail.com> > Subject: [amsat-bb] Re: 51 on, then off again > To: "Andrew Glasbrenner" <glasbren...@mindspring.com>, "amsat-bb" > <amsat-bb@amsat.org> > Message-ID: <CD3A0C76DF4C4565A5C53CD54988A32B@dualcore> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > now here off > send tone 67.0 is off > > Raul Romero > 9-7190753 > ce3...@gmail.com > > > > > ----- Original Message ----- > From: "Andrew Glasbrenner" <glasbren...@mindspring.com> > To: "amsat-bb" <amsat-bb@amsat.org> > Sent: Wednesday, April 20, 2011 2:06 PM > Subject: [amsat-bb] 51 on, then off again > > >> I turned AO-51 back on, and tried to turn the PL system on unsuccessfully >> before the end of the pass. Sorry about that, I'll get it on on the next >> pass. Get your 67Hz PL tone programmed back in! >> >> 73, Drew KO4MA >> >> >> _______________________________________________ >> Sent via AMSAT-BB@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 > > > > ------------------------------ > > Message: 3 > Date: Wed, 20 Apr 2011 15:06:43 -0700 > From: "Ted" <k7trkra...@charter.net> > Subject: [amsat-bb] Re: 51 on, then off again > To: "'Andrew Glasbrenner'" <glasbren...@mindspring.com>, "'amsat-bb'" > <amsat-bb@amsat.org> > Message-ID: <7A46AF569C854D3FAEBC5A83A3381648@HamComputer> > Content-Type: text/plain; charset="us-ascii" > > RU changing the uplink back to the old freq? > > -----Original Message----- > From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On > Behalf Of Andrew Glasbrenner > Sent: Wednesday, April 20, 2011 10:06 AM > To: amsat-bb > Subject: [amsat-bb] 51 on, then off again > > I turned AO-51 back on, and tried to turn the PL system on unsuccessfully > before the end of the pass. Sorry about that, I'll get it on on the next > pass. Get your 67Hz PL tone programmed back in! > > 73, Drew KO4MA > > > _______________________________________________ > Sent via AMSAT-BB@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 > > > > > ------------------------------ > > Message: 4 > Date: Wed, 20 Apr 2011 15:18:36 -0400 (GMT-04:00) > From: Andrew Glasbrenner <glasbren...@mindspring.com> > Subject: [amsat-bb] Re: 51 on, then off again > To: Ted <k7trkra...@charter.net>, "'amsat-bb'" <amsat-bb@amsat.org> > Message-ID: > > <11802921.1303327116744.javamail.r...@elwamui-ovcar.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > No, I'll let everyone know when we do though. > > 73, Drew KO4MA > > > -----Original Message----- >> From: Ted <k7trkra...@charter.net> >> Sent: Apr 20, 2011 6:06 PM >> To: 'Andrew Glasbrenner' <glasbren...@mindspring.com>, 'amsat-bb' >> <amsat-bb@amsat.org> >> Subject: RE: [amsat-bb] 51 on, then off again >> >> RU changing the uplink back to the old freq? >> >> -----Original Message----- >> From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On >> Behalf Of Andrew Glasbrenner >> Sent: Wednesday, April 20, 2011 10:06 AM >> To: amsat-bb >> Subject: [amsat-bb] 51 on, then off again >> >> I turned AO-51 back on, and tried to turn the PL system on unsuccessfully >> before the end of the pass. Sorry about that, I'll get it on on the next >> pass. Get your 67Hz PL tone programmed back in! >> >> 73, Drew KO4MA >> >> >> _______________________________________________ >> Sent via AMSAT-BB@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 >> >> > > > > > > ------------------------------ > > Message: 5 > Date: Wed, 20 Apr 2011 18:16:38 -0400 > From: Stuart Balanger <wa2...@gmail.com> > Subject: [amsat-bb] Fwd: ARLS006 Transatlantic Amateur Radio Balloon > Launch > To: ros...@wr2abb.org, memb...@wr2abb.org, k...@arrl.net > Cc: AMSAT-BB@amsat.org > Message-ID: <BANLkTimrq09W95hDwe6phKzNEHHmf=s...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > *Hi Guys & Gals, (Note, the top fart is for MBARC > Members; & anyone can read the top part, which > is not private!) > Since I know that some of the new "Hams" are not > ARRL Members, I thoughtthat this would be a perfect > oppertunity to have the "New Hams" join ARRL & MBARC & the club would get > alittle back, when the "New Hams joun both ARRL & MBARC! > The ARRL home page is: www.arrl.org > & MBARC home Page: www.wr2abb.org/home/ > Next MBARC "In Person" meeting (5/10); 7PM, > Po'k Gallaria (Community Room), In back of Food Ct. > (On 2nd. floor, & SW Corner of Bldg. (Where City Po'k > & Dut. Co. Loop Buses Stup!) > 73,.Stu (WA2BSS;Director) > * > ---------- Forwarded message ---------- > From: ARRL Web site <memberl...@www.arrl.org> > Date: Wed, Apr 20, 2011 at 2:07 PM > Subject: ARLS006 Transatlantic Amateur Radio Balloon Launch > To: wa2...@gmail.com > > > SB SPACE @ ARL $ARLS006 > ARLS006 Transatlantic Amateur Radio Balloon Launch > > ZCZC AS06 > QST de W1AW > Space Bulletin 006 ARLS006 >> From ARRL Headquarters > Newington, CT April 20, 2011 > To all radio amateurs > > SB SPACE ARL ARLS006 > ARLS006 Transatlantic Amateur Radio Balloon Launch > > The Project Blue Horizon 5 high-altitude transatlantic balloon is > scheduled for launch, weather permitting, at 0400 UTC (midnight > EDST) Friday, April 22, from Oswego, New York. The weather forecast > for launch time calls for clear to partly cloudy conditions. > > The Project Blue Horizon team is attempting to break current Amateur > Radio high-altitude balloon records for distance (3361.81 miles) and > duration (49 hours, 45 minutes). The payload will be carried beneath > a 54,000 cubic foot capacity helium-filled balloon cruising between > 85,000 and 100,000 feet. > > Amateurs worldwide are encouraged to monitor the N2XE CW telemetry > beacons at 7.1023 and 10.1466 MHz. The balloon is also equipped with > an APRS beacon at 144.39 MHz using the call sign KC2ZJH. Amateurs > can send reports via e-mail to pbh15.d...@gmail.com. > > More information about the program, including the latest projected > flight path, is at the Project Blue Horizon website at, > http://www.projectbluehorizon.com. Launch and flight updates will > also be available on Twitter at, http://twitter.com/#!/PBH5 . > NNNN > /EX > > > ------------------------------ > > Message: 6 > Date: Thu, 21 Apr 2011 02:26:08 +0200 > From: "i8cvs" <domenico.i8...@tin.it> > Subject: [amsat-bb] Re: HF Satellite Experiment? (hi Z) > To: "Bob Bruninga" <bruni...@usna.edu>, "'James Duffey'" > <jamesduf...@comcast.net> > Cc: 'amsat-bb BB' <amsat-bb@amsat.org> > Message-ID: <000001cbffba$f5da1060$0401a8c0@b3o7f1> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Bob, WB4APR > > I suggest you to take a look at the succesful 20 MHz and 40 MHz > HF antennas used by SPUTNIK-1 > > http://www.antenna-theory.com/phpbb2/viewtopic.php?p=451&sid=e909b07b8e95c79 > ac9a04a6adec04932 > > The 58 cm sphere had four antennas, two were 2.4 meters long and > two were 2.9 meters long. They were V shaped turnstile angled at 35 > degrees from the longitudinal axis, and two transmitters alternately > emitted 20 or 40 MHz. > > Following your proposal a deployed 1000m tether have a very poor > radiation efficiency and will have so much drag and the Cubesat will > de-orbit in only a few days > > On the other side the V shaped turnstile are very short and your Cubesat > experiment will not be limited by the drag factor and will last a very long > time . > > Also take a look at the HF antennas of OSCAR-6, OSCAR-7, RS-10/11, > RS-12/13, RS-15 and RS-16 > > 73" de > > i8CVS Domenico > > ----- Original Message ----- > From: "Bob Bruninga" <bruni...@usna.edu> > To: "'James Duffey'" <jamesduf...@comcast.net> > Cc: "'amsat-bb BB'" <amsat-bb@amsat.org> > Sent: Wednesday, April 20, 2011 8:41 PM > Subject: [amsat-bb] Re: HF Satellite Experiment? (hi Z) > > >> Subject: Re: [amsat-bb] HF Satellite Experiment? >> >>> Bob - Calculate the resistance of 1000M of whatever >>> wire you are using at the frequencies you are operating on. >>> It will be low. The resistive component of the impedance >>> will dominate the reactive component, so a simple >>> transformer will do. >> >> Turns out I just learned today that the tether is going to be about 2k > ohms. >> That's 2 ohms per meter or Huge! For the first half wavelength at 7 MHz, >> this is 40 ohms or a nice dummy load... >> >> Putting that into EZNEC changes the antenna from the expected long-wire > cone >> with 14 dBi gain straight down to a nearly perfect Dipole pattern (off the >> sides) with a gain of - 64 dBi and a feed point impedance of 50000 > +j36000. >> In other words, only the first 1/2 wave is really doing anything as far as >> pattern. >> >> Again, these are only 1st cut assessments(we haven't really modeled the >> actual cubesat structure yet), but this high resistance of the tether is >> really going to need some looking at... >> >> Bob, WB4APR >> >>> Cubesat HF experiment: >>> >>> >>> >>> We have revised our HF satellite experiment proposal to be a CW > telemetry >>> beacon on 40, 20, 15 and 10 meter bands. The experiment will last only > a >>> few days, since the deployed 1000m tether will have so much drag, we > will >>> de-orbit in only a few days. >>> >>> >>> >>> The idea is a keyed CW oscillator on 7.010 MHz with harmonics on 14.020, >>> 21.030 and 28.040 MHz. These bands are all in the IARU Satelilte >>> allocation. We will filter all harmonics above 28 MHz. >>> >>> >>> >>> The challenge will be how to feed a 1000m long wire from only a 4"x4"x7" >>> counterpoise (on all bands). transformer coupling? >>> >>> >>> >>> The tether will be vertical and can act as a long wire antenna with a > very >>> narrow cone angle pointed straight down. Antenna gain will be more than >> 10 >>> dB on all bands. This moving donut gain pattern sweeping across the > earth >>> should pose some interesting reception reports (If any of it gets > through >>> the ionosphere). >>> >>> >>> >>> Launch Opportunity no earlier than March 2012. Putting us closer and >> closer >>> to the Solar Max which would be the worst time for this experiment. >>> >>> >>> >>> Other than a nice AMSAT experiment, if anyone can use this for valid >>> ionosphereic science, come join us. >>> >>> >>> >>> Bob, WB4APR >>> >>> >>> >>> >>> >>> >>> >>> _______________________________________________ >>> Sent via AMSAT-BB@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 >> >> -- >> KK6MC >> James Duffey >> Cedar Crest NM >> >> >> >> >> >> >> _______________________________________________ >> Sent via AMSAT-BB@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 > > > > ------------------------------ > > Message: 7 > Date: Wed, 20 Apr 2011 21:33:27 -0700 > From: Clint Bradford <clintbradf...@mac.com> > Subject: [amsat-bb] Element Corrosion > To: AMSAT BB <amsat-bb@amsat.org> > Message-ID: <ac58feee-4b4f-4604-b5a7-02b7a9d68...@mac.com> > Content-Type: text/plain; CHARSET=US-ASCII > >> From my in box this evening - any ideas for this gentleman? > > What do you recommend to treat aluminum corrosion? My HyGain 14-AVQ > seems to have problems with that issue even here in dry heat Palm Springs, CA. > > I used to recommend cleaning and a liberal slathering of marine spar varnish > - > which works for me in Riverside, CA. But what is better for a harsher > environment? > > Clint > > > ------------------------------ > > Message: 8 > Date: Wed, 20 Apr 2011 22:20:05 -0700 > From: Clint Bradford <clintbradf...@mac.com> > Subject: [amsat-bb] Re: Element Corrosion > To: AMSAT BB <amsat-bb@amsat.org> > Message-ID: <78592835-2468-4e19-ade9-b9aba497c...@mac.com> > Content-Type: text/plain; CHARSET=US-ASCII > > THANK YOU all for your immediate and informative replies! > > Clint > > > > > ------------------------------ > > Message: 9 > Date: Wed, 20 Apr 2011 21:46:36 -0700 (PDT) > From: Frank Viggiano <frankviggi...@rocketmail.com> > Subject: [amsat-bb] Looking for Yaesu azimuth/elevation Rotors > To: amsat-bb@amsat.org > Message-ID: <751908.60219...@web113015.mail.gq1.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Any one have G5400 or sim rotor 4 sale?73Kb2mvn > > ------------------------------ > > Message: 10 > Date: Thu, 21 Apr 2011 00:09:04 -0700 > From: Clint Bradford <clintbra...@earthlink.net> > Subject: [amsat-bb] ICOM Giving Away D-Star Repeaters > To: AMSAT BB <amsat-bb@amsat.org> > Message-ID: <3e52c1fd-1643-4ba7-8977-8c79dec51...@earthlink.net> > Content-Type: text/plain; charset=us-ascii > > > http://www.icomamerica.com/en/dstarpromo/ > > Sent from my iPod touch. > > > ------------------------------ > > Message: 11 > Date: Thu, 21 Apr 2011 07:54:25 -0400 > From: "Bob Bruninga" <bruni...@usna.edu> > Subject: [amsat-bb] Balloon across Atlantic delayed to 27/29 apr > To: "'amsat-bb BB'" <amsat-bb@amsat.org> > Cc: 'TAPR APRS Mailing List' <aprs...@tapr.org> > Message-ID: <07c001cc001a$dca592d0$95f0b870$@edu> > Content-Type: text/plain; charset="UTF-8" > > I have been informed: > > The trans-atlantic balloon attempt, PBH-15, has been postponed until next > week due to unfavorable flight predictions and some last minute testing > issues. > > They will now be attempting to launch PBH-15 sometime next week (4/27-4/29). > Latest info can always be found on Twitter (@PBH5) or by contacting > <triebwas...@gmail.com> > > Thanks for the help and hope to hear from you next week. > > PBH5 Team > > ---------- Forwarded message ---------- > From: Bob Bruninga <bruni...@usna.edu> > Date: Tue, Apr 19, 2011 at 4:22 PM > Subject: Balloon across Atlantic 21 April? > To: Amsat <amsat-bb@amsat.org>, TAPR APRS Mailing List <aprs...@tapr.org> > Cc: Tom Triebwasser <triebwas...@gmail.com>, Bob Bruninga <bruni...@usna.edu> > > > KC2TUA announces: Balloon attempt across the Atlantic. 21 April 2011 > > Hams in the USA and worldwide are needed to listen on 7.1023 and 10.1466 MHz > and to send readings of the balloon's progress to pbh15.d...@gmail.com. More > information about the program, including the latest projected flight path, > can be found at http://www.projectbluehorizon.com/ > https://twitter.com/PBH5. > > It also has an APRS GPS tracker on 144.39 with the callsign KC2ZJH and will > launch from Oswego, NY around midnight Thursday. Thanks in advance for your > help! > > The HF downlink exact frequency will vary 10 Hz or so with temperature. > Accurate recording of frequency will be useful. > > 73, > -Tom Triebwasser > PBH Alumnus '09 > KC2TUA > > ----------------------------------------------------------------------- > > The Project Blue Horizon Increment 5 (PBH V) team has finalized a launch > window for the third and final flight of Increment 5; launch of PBH-15 is > tentatively planned for 4/21/11 ? 4/22/11. The team will be rolling out GO/ > NO-GO communications to all parties to provide adequate time for interested > individuals to plan accordingly for observing the launch or tracking and > following the mission progress. > > The PBH-15 mission will be the Increment 5 teams attempt at breaking the > current ARHAB distance (3,361.81 miles) and duration (49 hours, 45 minutes) > records. It will include integration of an altitude control mechanism for > reducing air vehicle weight during flight to sustain float and 30m HF > communications via an Enhanced Morse Decoder provided by Dylan Thorner of > Enhanced Solutions. PBH-15 will be lifted with a 54,000 cubic foot > Zero-pressure envelope and is projected to float for long durations between > 85,000-110,000. > > The current target for executing launch of PBH-15 is between 11:00PM ? > 12:00AM on Thursday (4/21)/Friday (4/22), weather and approval permitting. > > At conclusion of Thursday?s Flight Readiness Review (2PM - 3PM), the team > will provide updated GO/ NO-GO information. > > During the PBH-15 mission, the Twitter feed will be updated in 30 minute > increments at: http://twitter.com/PBH5 > > -------------------------------------- > > For those interested in tracking the Mission Payload, the following band > plan and call signs will be used for PBH-15: > > Function > Frequency > Required > HAM Level > > Payload > Call Sign > Primary Voice / Mission Communication > 147.500MHz > Technician > > Mission Payload HF (40m) > N2XE > Secondary Voice / Mission Communication > Owego Repeater (Duplex) > 146.760MHz > Technician > > Mission Payload HF (30m) > N2XE > > > > > Mission Payload APRS > KC2ZJH > APRS > 144.390MHz > Technician > > > > 40m HF (Morse Code) > See attached > Technician > > > > 30m HF (Morse Code) > See attached > General > > > > > Users can input data received from the Mission Payload via the ?User Input? > tab at http://www.projectbluehorizon.com/. > > Points received from the PBH-15 payload over HF can also be submitted to: > pbh15.d...@gmail.com > > Thanks, > > Matthew T. Lewis > > > > > > > ------------------------------ > > Message: 12 > Date: Thu, 21 Apr 2011 08:26:12 -0400 > From: Bobby Lacey <am...@duaneallman.net> > Subject: [amsat-bb] STS-134 > To: amsat-bb@amsat.org > Message-ID: <banlktinzvavwdrnot8cr6agltyh36ha...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > I will be down at KSC to cover Endeavour's last launch from the press site > next week, and I was just wondering if any hams on the list would be making > the trip down to the cape? The white house announced yesterday that POTUS > will be attending this launch, so security may be interesting. > > I'll be tweeting and posting photos of RSS retraction + launch. > > http://www.twitter.com/kf4gta > http://www.flickr.com/photos/rllacey > > 73 > Bobby > KF4GTA > > > ------------------------------ > > Message: 13 > Date: Thu, 21 Apr 2011 09:01:29 -0400 > From: Tom Williams <tdub20...@yahoo.com> > Subject: [amsat-bb] Re: STS-134 > To: Bobby Lacey <am...@duaneallman.net> > Cc: "amsat-bb@amsat.org" <amsat-bb@amsat.org> > Message-ID: <51123887-5f5f-430d-a6ad-098622fad...@yahoo.com> > Content-Type: text/plain; charset=us-ascii > > There's a good bunch of hams in the area that cover just about all of the > Cape launches and rebroadcast the countdown nets on a local repeater. > > You can get the skinny at http://www.lisats.org/. > > I was able to view a shuttle launch a while back from next to the VAB, and > had my little VX-3 tuned to their freq. I was consistently up to date on > holds, issues, and the like. > > 73s > > Tom Williams > KJ4EAW > > On Apr 21, 2011, at 8:26 AM, Bobby Lacey <am...@duaneallman.net> wrote: > >> I will be down at KSC to cover Endeavour's last launch from the press site >> next week, and I was just wondering if any hams on the list would be making >> the trip down to the cape? The white house announced yesterday that POTUS >> will be attending this launch, so security may be interesting. >> >> I'll be tweeting and posting photos of RSS retraction + launch. >> >> http://www.twitter.com/kf4gta >> http://www.flickr.com/photos/rllacey >> >> 73 >> Bobby >> KF4GTA >> _______________________________________________ >> Sent via AMSAT-BB@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 > > > > ------------------------------ > > Message: 14 > Date: Thu, 21 Apr 2011 09:09:04 -0400 > From: "Mark L. Hammond" <marklhamm...@gmail.com> > Subject: [amsat-bb] AO-51 now requires 67 Hz PL tone; activity > reports appreciated > To: Amsat - BBS <amsat-bb@amsat.org> > Cc: ao51-mo...@amsat.org > Message-ID: <BANLkTik5rv632SpUCMXqqwYDWtmgD=5...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hello AO-51 users, > > As you have noticed, AO-51 has recently experienced a few shutdowns > due to a low battery voltage trip. This is because of increasing > eclipses (now at 20 mins per orbit and increasing), poor sun angles > (still getting worse), and a "weak" battery. > > We are now using the 67 Hz PL tone required mode in order to turn the > transmitter(s) OFF when not in use. The transmitter power is down to > about 550 mW. We will continue adjusting various parameters, > including transmitter power, trigger voltages, etc. in order to keep > the battery temperatures reasonable. Keep in mind that the power > management feature keeps the transmitter(s) OFF during eclipses, so > you can't bring it up even with a PL tone while the satellite is in > eclipse. > > Here is our current schedule, which will continue until further notice: > > AO-51 Schedule > > Mode V/U FM Voice Repeater (**67 Hz PL tone required**) > Uplink: 145.880 MHz FM (Temporarily from 145.920) > Downlink 435.300 MHz FM > > > The AO-51 Command Team can use your help! > > 1-Please make activity reports to: http://oscar.dcarr.org/ This is > very useful to all users. Until everyone knows that the 67 Hz tone > is required, we might see some conflicting reports. > > 2-Please help spread the word about needing the 67 Hz tone! > > 73, > > -- > Mark L. Hammond [N8MH] > > > ------------------------------ > > Message: 15 > Date: Thu, 21 Apr 2011 09:45:38 -0400 (EDT) > From: hmarti...@ucf.edu.cu > Subject: [amsat-bb] CO6CBF from EL92 QRV tomorrow on AO7 mode A > To: amsat-bb@amsat.org > Message-ID: <1212.10.14.32.15.1303393538.squir...@correo.ucf.edu.cu> > Content-Type: text/plain; charset="utf-8" > > > > > > Hello friends > > ? > > > > ? > > I will try to be QRV on AO7 in mode (A) tomorrow morning and tomorrow > afternoon > around 29.447 KHz in CW. > > ? > > > > ? > > This is a great experiment for me because I will be trying my homemade setup. > > Thank you and 73 > > ? > > ? > Hector, CO6CBF > > ? > > EL92 > > ? > > > > *************************************** > Genius is one per cent > inspiration, > and ninety-nine per cent > perspiration. > -- Thomas A. > Edison > *************************************** > > > --- > Free the Cuban Five! > http://www.injusticia.cubaweb.cu/, http://www.antiterroristas.cu/ > > Participe en Universidad 2012, del 13 al 17 de febrero de 2012. Habana, Cuba. > http://www.congresouniversidad.cu/ > > Consulte la Enciclopedia Colaborativa Cubana: http://www.ecured.cu/ > > ------------------------------ > > Message: 16 > Date: Thu, 21 Apr 2011 16:17:54 +0200 > From: "Eric Knaps, ON4HF" <on...@telenet.be> > Subject: [amsat-bb] Re: AO-51 now requires 67 Hz PL tone; activity > reports appreciated > Cc: Amsat - BBS <amsat-bb@amsat.org>, ao51-mo...@amsat.org > Message-ID: <4db03c92.2080...@telenet.be> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hello, > > Just worked AO-51 without 67Hz tone. I noticed that the carrier drops > out sometimes. I guess you activate the carrier again with subtone but > i'm not sure. > 73, > Eric. > > Amateur Radio Station ON4HF > Eric Knaps > Satellite manager UBA > > Tel. +32472985876 (mobile) > > http://www.on4hf.be > > > Op 21/04/2011 15:09, Mark L. Hammond schreef: >> Hello AO-51 users, >> >> As you have noticed, AO-51 has recently experienced a few shutdowns >> due to a low battery voltage trip. This is because of increasing >> eclipses (now at 20 mins per orbit and increasing), poor sun angles >> (still getting worse), and a "weak" battery. >> >> We are now using the 67 Hz PL tone required mode in order to turn the >> transmitter(s) OFF when not in use. The transmitter power is down to >> about 550 mW. We will continue adjusting various parameters, >> including transmitter power, trigger voltages, etc. in order to keep >> the battery temperatures reasonable. Keep in mind that the power >> management feature keeps the transmitter(s) OFF during eclipses, so >> you can't bring it up even with a PL tone while the satellite is in >> eclipse. >> >> Here is our current schedule, which will continue until further notice: >> >> AO-51 Schedule >> >> Mode V/U FM Voice Repeater (**67 Hz PL tone required**) >> Uplink: 145.880 MHz FM (Temporarily from 145.920) >> Downlink 435.300 MHz FM >> >> >> The AO-51 Command Team can use your help! >> >> 1-Please make activity reports to: http://oscar.dcarr.org/ This is >> very useful to all users. Until everyone knows that the 67 Hz tone >> is required, we might see some conflicting reports. >> >> 2-Please help spread the word about needing the 67 Hz tone! >> >> 73, >> > > > ------------------------------ > > Message: 17 > Date: Thu, 21 Apr 2011 09:32:45 -0400 (GMT-04:00) > From: Andrew Glasbrenner <glasbren...@mindspring.com> > Subject: [amsat-bb] Re: [ao51-modes] Re: AO-51 now requires 67 Hz PL > tone; activity reports appreciated > To: "Eric Knaps,ON4HF" <on...@telenet.be> > Cc: Amsat - BBS <amsat-bb@amsat.org>, ao51-mo...@amsat.org > Message-ID: > > <3230746.1303392765706.javamail.r...@elwamui-chisos.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > > > > -----Original Message----- >> From: "Eric Knaps, ON4HF" <on...@telenet.be> >> >> Hello, >> >> Just worked AO-51 without 67Hz tone. I noticed that the carrier drops >> out sometimes. I guess you activate the carrier again with subtone but >> i'm not sure. >> 73, >> Eric. > > Thanks Eric. You are correct. In this newer PL scheme, the 67 Hz tone turns > the transmitter on for two minutes, and the uplink receiver is open > squelched. If someone else on the satellite has their tone on and activates > the repeater, you can have a QSO with them in the 2 minute window. The open > squelch also prevents the logjam effect we see on the older PL mode, where > multiple stations may be transmitting simultaneously with none getting > through, and maybe not realizing why. > > 73, Drew KO4MA > AMSAT-NA VP Operations > > > > > ------------------------------ > > _______________________________________________ > Sent via amsat-bb@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 6, Issue 231 > **************************************** Lou McFadin W5DID ARISS US Hardware manager _______________________________________________ Sent via AMSAT-BB@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
