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-
- SB SAT @ AMSAT $ANS-310.01
- AMSAT NET
-
- HR AMSAT NEWS SERVICE BULLETIN 310.01 FROM AMSAT HQ
- SILVER SPRING, MD. NOVEMBER 6, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-310.01
-
-
- Houston AMSAT Net Available via Satellites and Many Local Repeaters
- Data updated 11/01/94
-
- The Houston area AMSAT Net which originates live each Tuesday at
- 10:00 PM Central Time on 147.100 is carried live on Galaxy 3,
- Transponder 17, 5.8 Mhz audio subcarrier. Many amateur repeaters
- across this country and in Canada are taking this satellite
- downlink and putting it out. For a list of such repeaters,
- contact Marty Smith WD5DZC at (713) 467-9870 or Bruce Paige KK5DO
- at (713) 933-0488 or via Internet: KK5DO@AMSAT.ORG or:
- paigecom@neosoft.com
-
- This net is of a technical nature for those interested in Satellite, ATV
- and balloon launch communications. If this net is not available in your
- area, you might wish to ask your repeater trustee to get in touch with
- Marty or Bruce about carrying it.
-
- ANS thanks Bruce Page KK5DO and Marty Smith WD5DZC for the information
- that went into this bulletin.
-
- /EX
-
- SB SAT @ AMSAT $ANS-310.02
- COMPUTER SHOW
-
- HR AMSAT NEWS SERVICE BULLETIN 310.02 FROM AMSAT HQ
- SILVER SPRING, MD. NOVEMBER 6, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-310.02
-
-
- COMDEX Computer Show OSCAR Get-together (Las Vegas)
-
- Tom, N7MPM, who you may know from AO-21 and FO-20 and Frank,
- N7ZEV, are holding a get-together for all the OSCAR satellite
- enthusiasts coming to the show in Las Vegas. It'll be November
- 16, Wednesday, at 4 P.M., Las Vegas local time (PST). This is an
- informal affair with sodas and hors d'oeuvres being served. The
- meeting place is at Frank's QTH, 4233 Warm Springs Road in the
- Blue Diamond area of Las Vegas. Since Frank is not only a
- satellite enthusiast, but big into ATV, here's another good
- reason to attend. You'll need to call Tom or Frank in advance so
- they can be amply prepared for the crowd. Frank's phone number
- is 702-361-6080. Or call Tom at 702-644-1446 as soon as you know
- you can attend. Tom may be easier to reach during the
- day than Frank so try him first.
-
- Both Tom and Frank will be monitoring 146.48 MHz simplex (they
- have good antennas!) and can give you talk-in directions on the
- 16th from anywhere in Las Vegas. If you think you may be busy in
- Las Vegas that day but suddenly find you have some spare time,
- Tom and Frank would like to have you join them.
-
- Perspective attendees may also confirm through
- bmyers@primenet.com or w1xt@amsat.org or via KO-23/KO-25 to W1XT
-
- ANS thanks Bob Myers, W1XT for this information.
-
- /EX
-
- SB SAT @ AMSAT $ANS-310.03
- SEDSAT
-
- HR AMSAT NEWS SERVICE BULLETIN 310.03 FROM AMSAT HQ
- SILVER SPRING, MD. NOVEMBER 6, 1994
- TO ALL RADIO AMATEURS BT
- BID:310.03
-
-
- SEDSAT Milestone
-
- Dennis Wingo KD4ETA SEDSAT 1 Project Mangler announces a
- milestone in the SEDSAT 1 satellite development program. He says
- that the Mode A transponder built by Cynetics for the SEDSAT 1
- satellite has been delivered to University of Alabama at
- Huntsville. He plans to put the transponder on the air for
- testing in the during the month of November to ascertain its real
- world operating parameters and conditions as well as to finish
- "infant mortality" testing of the components. This presents a
- possible opportunity for some interesting contacts.
-
- The frequencies of operation for the SEDSAT Mode A transponder
- are:
-
- Uplink 145.915-145.975 Mhz
- Downlink 29.350-29.410 Mhz
-
- This means that the uplink for the SEDSAT 1 mode A transponder
- falls totally within the downlink passband for OSCAR 13 which is:
-
- In preliminary testing, Dennis reports that they have already
- heard OSCAR 13 mode B downlink signals on the ten meter output of
- the transponder. This give satellite enthusiasts the chance to
- work crossband through AO-13 and the SEDSAT test unit, provided
- that propagation exists between their QTH and Hunstsville. This
- time of year, the winter Sporadic E (short skip) season just may
- provide such propagation.
-
- Dennis will release information on the exact dates for the tests
- via ANS and AMSAT.BB.
-
- ANS thanks Dennis Wingo KD4ETA SEDSAT 1 Project Manager for this
- information.
-
- /EX
-
-
- SB SAT @ AMSAT $ANS310.04
- WO-18
-
- HR AMSAT NEWS SERVICE BULLETIN 310.04 FROM AMSAT HQ
- SILVER SPRING, MD. NOVEMBER 6, 1994
- TO ALL RADIO AMATEURS BT
- BID:$ANS-310.04
-
-
- WO-18 Status
-
- The modulation problems aboard WO-18 have improved, according to
- a recent report from, Chris Williams, WA3PSD. A number of things
- have been done and will be done to address this issue, he said.
-
- The phasing control for the Raised Cosine Transmitter is now set
- to 0E. Spectrum analysis showed this to have only a subtle
- effect on the signal, but copy of data definitely improved with
- the change. Various stations around the world have confirmed
- this improvement. We are now collecting over 100K per pass,
- Chris added. He characterized this as "essentially nominal". He
- further said that use of the IF shift on their Kenwood '11 series
- transceiver seems to improve matters.
-
- WA3PSD speculated that the current prime suspect is the
- intermittent presence of a strong audio sub-tone in the downlink
- signal. He said that it is also intermittently present on LUSAT,
- but at a lower amplitude; but not seen prominently on AO-16's
- signal. It has been suggested this tone is a result of degraded
- carrier suppression. In any event, a spurious tone would explain
- why an IF shift offset improves performance. A notch should be
- even better, he concluded.
-
- Williams wonders, however, why, if a spurious tone is the
- problem, changing the phase setting of the transmitter improves
- matters. Phil Karn KA9Q has suggested digitizing the audio with
- a SoundBlaster card for distribution to others for analysis.
- Chris says that this is near the top of his current list of
- things to do.
-
- So, the bottom line is that WO-18 can now be copied in only a
- slightly degraded fashion. Telemetry indicates all is well
- aboard the spacecraft. Imaging and spectroscopy work will
- continue normally.
-
- ANS wishes to thank Chris Williams, WA3PSD for this bulletin
- information. He can be reached at cwilliams@cc.weber.edu
-
-
- For the month of NOVEMBER you have a NEW AMSAT NEWS SERVICE editor, W3QNS,BOB
- PLEASE send all information to w3qns@amsat.org on the internet or to
- 76446,1615 on $CIS. I WILL BE GRATEFUL FOR ALL HELP!
- The AMSAT NEWS SERVICE (ANS) is looking for volunteers to contribute weekly
- OSCAR status reports. If you have a favorite OSCAR which you work on a
- regular basis and would like to contribute to this bulletin, please send
- your observations to the above adresses. THANK YOU,bob w3qns
-
- /EX
-