AMSAT-BB April 2012

108 participants
161 discussions

LVB Tracker USB serial port driver for Windows 7 x64?
by Bill Bordy, NJ1H 22 Dec '16

22 Dec '16

Has anyone located a driver for the LVB Tracker internal USB to serial port adapter on Windows 7 x64? If not, has anyone reverted to the serial port connection on LVB Tracker and used an external USB to serial port adapter successfully with SatPC32 on Windows 7 x64? I have an Edgeport multiple USB to serial port that has drivers for Windows 7 x64 that I will use if I have to. I would prefer using the LVB Tracker with its USB to serial adapter if someone has another solution. 73, Bill NJ1H

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AO-16 telemetry 3 Oct 2010
by Mark L. Hammond 01 Jul '16

01 Jul '16

Hi All, Here is a quick AO-16 update. On Sunday I turned AO-16 long enough to get some telemetry packets. The satellite would remain on for less than one minute after being commanded on. A quick test of the "bent pipe" voice mode repeater was successful. . The "hardware watchdog timer problem" is still evident; as expected, spacecraft temperatures are insufficient to keep the transmitter ON (needs to be above 15 deg C). Orbit projections suggest that satellite illumination conditions will not result in increased temperatures for nearly 10 years. Command stations do periodically turn AO-16 "ON" to check on its condition and see if the hardware timer problem has "automagically" fixed itself (which in not anticipated, but who knows...). AO-16 telemetry 3 Oct 2010 1838 utc PACSAT MBL Telemetry Decoder Ver. 1.3 (c) Mike Rupprecht, DK3WN =============================================================================== (average values) +10V Battery Bus : 0.00 V Battery Charge Reg : 0.55 mA Base Temp : 9.07 °C PSK RF Out : 1.90 W +5V RX Bus : 4.87 V +8.5V RX Bus : 8.49 V +10V RX Bus : 11.24 V Here is another teaser :) Several months ago I commanded the AO-16 S-band transmitter ON; it too remains functional (albeit weak), and was received by me, Drew KO4MA, and Alan WA4SCA. 73, -- Mark L. Hammond [N8MH]

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VO-52 beacon heard I think
by Ib Christoffersen 09 Aug '12

09 Aug '12

Hi all, I think I had a very small signal from Williams beacon frequency. Pass with AOS here in Copenhagen 1422 UTC - but just 1 degree of elevation in my worst direction. Hope I am right. Should be a good pass over NA in a few minutes. 73 OZ1MY Ib

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Call for Papers--2007 ARRL/TAPR Digital Communications Conference
by Ford, Steve, WB8IMY 16 Jul '12

16 Jul '12

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

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Re: EggBeater
by Bill Dzurilla 29 May '12

29 May '12

Steve, I have both a commercial and a homebrew Eggbeater and am disappointed with both, especially in light of its rather high price. Connected to my IC-7000 via an ARR mast-mounted preamp, performance is far less than with an HT and an Arrow. Guess an omni can't cut it, at least not from my QTH. Maybe if I could get it up higher, clear of all roofs, it would do better. I can make contacts at relatively high sat elevations, but can do just as well with a $10 dual band ground plane. My friend has an Eggbeater and the same preamp at a clearer QTH, and he hears substantially better, down to 10 degrees elevation in some directions. Good luck and 73, Bill NZ5N > > Hi Steve, > > > > It is surprising to read that you are not hearing > anything. I have > > repeatedly used a 2m and 70cm Eggbeater for the sats > and have had no > > problem hearing things. No pre-amp. > > > > I was using a short cable (e.g. less than 10 meters). > The rigs I > > used were a FT-736r (deaf) and a FT-847 (so-so). > > > > 73, > > > > Dave

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Dutch Transponder on-baord HAMSAT VO-52 'Turned On'
by Mani VU2WMY 04 May '12

04 May '12

Dear HAMSAT VO-52 users, The commands to 'Turn On' the transponder # 2 (Dutch transponder, made by Williams PE1RAH) on-board HAMSAT VO-52 was successfully sent during 14:00 UT 35 deg ascending Node pass over Bangalore, India. The sent commands were successfully received, acknowledged and confirmed by the telemetry. Subsequently, the transponder # 2 is now 'ON' and Williams CW message beacon was heard again after a gap of approximately 6 years & 4 months. The beacon signal was heard loud and strong here at Bangalore. A detailed Initial reports addressed to: tprangan(a)istrac.org and a copy to wmy(a)isac.gov.in would be greatly appreciated. 73 de Mani, VU2WMY Secretary & Station-In-Charge Upagrah Amateur Radio Club VU2URC ISRO Satellite Centre HAL Airport Road, Bangalore-560 017. Phone:(O)91-80-25082054/2598/2192 Mobile: 91-80-98803 41456 E-mail ID: wmy(a)isac.gov.in vu2wmy_mani(a)yahoo.com isrohams(a)yahoo.com ------------------------------------------------------------------------------ Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ------------------------------------------------------------------------------

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[amsat-bb] Delfi-C3 (DO-64) – 4 years in orbit
by Trevor . 01 May '12

01 May '12

See http://www.uk.amsat.org/6948 73 Trevor M5AKA ----

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Anyone using a Fox-Delta ST-1 (USB) with MacDoppler?
by Bill Howell 30 Apr '12

30 Apr '12

I'm thinking of retiring my Endeavour rotor control interface for something newer. Is anyone using a Fox-Delta ST-1 (USB) with MacDoppler on an iMac? I know that MacDoppler and the ST-1 are supposed to support the EasyCom protocol, but I'd like to know if anyone out there is actually using this combination. thanks, Bill N5AB

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SpaceX Test Firing Completed
by B J 30 Apr '12

30 Apr '12

Two attempts were required today. The first one was stopped at less than T-1 minute and the countdown resumed after about an hour. The test appears to have been successful. 73s Bernhard VA6BMJ @ DO33FL

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Changes to the IARU Satellite Advisor Region 1, Germany, AMSAT-DL
by Peter Guelzow 30 Apr '12

30 Apr '12

Changes to the IARU Satellite Advisor Region 1 I have recommended to the IARU Satellite Adviser that Mike Rupprecht takes over membership of the advisory panel form Norbert Nothoff and I'm happy to notify interested parties that he has agreed to appoint Mike, DK3WN as a panel member. He has thanked Norbert, DF5DP for his support as a member of the Advisory panel for many years and said that he is looking forward to work with Mike. Mike Rupprecht, DK3WN will help with the IARU Satellite Frequency Coordination process in Region 1 and in particular here in Germany. Mike is very active and well known on the satellite bands and Internet boards, and he has particularly profound knowledge of all cubesat operations. He is also very well known in the community of cubesat operators, including excellent communication connections to that groups. Mike Ruprecht, DK3WN will support Norbert Nothoff, DF5DP and take over the coordination process of satellite projects from him, which includes correspondence with the coordination group and the satellite operators. Norbert Nothoff, DF5DP will continue to stay in charge of anything which is related to government issues (government and office liaison, laws, bylaws, and regulations of satellite operations) in Germany. Peter Gülzow, DB2OS President, AMSAT-DL

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AMSAT-BB April 2012