April 2008 - AMSAT-BB - mailman.amsat.org

SEEDS CW/FM Analyzer
by Mineo Wakita 26 Apr '08

26 Apr '08

We are available a new analyzer at Nihon University site. http://cubesat.aero.cst.nihon-u.ac.jp/english/index.html http://cubesat.aero.cst.nihon-u.ac.jp/english/blog.html http://cubesat.aero.cst.nihon-u.ac.jp/download/Downlink_Code_for_Distributi…

1 0

Re: FT817 service manual, repair or parts
by David Donaldson 26 Apr '08

26 Apr '08

I will admit publically I toasted my 817 and took 6 months and $500 to fix. I spent the money in order to prove I could fix it. There are more voltages then the 12 and 5 volt. There is 9V TX, 9V RX and regulators on the both the main board and the PA board (but not the module). To save the list my painful story I will contact you directly with my hints. Others my have simular help. I need to get to a real computer other then this moble phone.... Dave WB7DRU Burnsville ,MN US Sent with Wireless Sync from Verizon Wireless by DAVE DONALDSON-Burnsville MN Amateur radio: WB7DRU Navy Mars: NNN0AXK ---- Original Message ---- From: "Pieter Kotze" <PKotze(a)csir.co.za> Date: 4/25/08 2:32 am To: "amsat-bb(a)amsat.org" <amsat-bb(a)amsat.org> Subj: [amsat-bb] FT817 service manual, repair or parts Hello all Managed to kill my 817 some time ago with a power spike from a dodgy power supply. Found some burnt components and tracks on the main board next to the ribbon cable leading to the front panel and LCD. This prevented the 12V from reaching the front panel. Did a small mod to get the 12V around this burnt track. Still no switch on from the 817. Then found another burnt component, the 5V regulator next to the power switch on the front panel PCB. Temporary replaced the 5v surface mount with a 7805 regulator, but still no joy. Beginning to think that a lot more must have been damaged by the power spike. Anyone out there got more of a service manual to try and track the fault? Otherwise anyone got an 817 that has damage elsewhere from which I could try and swop subparts / PCB to get mine working again? Regards Pieter ZS1PK -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ 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 --- Get FREE High Speed Internet from USFamily.Net! -- http://www.usfamily.net/mkt-freepromo.html ---

1 0

FS: Kenwood TS-811
by Jack 26 Apr '08

26 Apr '08

I have for sale a very nice TS-811 I bought new and used for satellite activity. I plan to attend Dayton Hamvention and will bring it along for inspection by anyone interested. Please contact me off list for additional info. hr_gear at charter.net See you at Dayton.

1 0

AMSAT Web Update: Multiple CubeSat Launch April 28
by JoAnne Maenpaa 26 Apr '08

26 Apr '08

Hello everyone, The AMSAT Web page http://www.amsat.org has been updated to provide summary information about the multiple CubeSat launch on April 28. Scroll to the bottom of the page for this information. -- 73 de JoAnne K9JKM k9jkm(a)amsat.org Editor, AMSAT News Service

1 0

CUTE1.7+APDII
by Mineo Wakita 26 Apr '08

26 Apr '08

CW Telemetry Checker Ver 0.5 Beta http://lss.mes.titech.ac.jp/ssp/cute1.7/index_e.html Screen shot http://www.ne.jp/asahi/hamradio/je9pel/80426cut.jpg de JE9PEL, Mineo Wakita

1 0

Re: Using an 817 on AO-51
by John Marranca, Jr 25 Apr '08

25 Apr '08

Likewise, I too, use nothing more than an FT-817ND...but I don't use automation for Doppler Correction. The 817 is quite adept at making QSOs via Satellite. (Next project: Making satellite contacts with a 2AT and a 4AT) John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA Local 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

1 0

Re: FT817 service manual, repair or parts
by Henk, PA3GUO 25 Apr '08

25 Apr '08

Hi Pieter, I had the same 2 yrs ago ... including smoke from within :-( All the el.cap's in the 12V input line exploded. They are rated only 16V or so, and there is NO protection at all inside the 817 for wrong polarity or too high voltage. As soon as you apply ~16V it's most likely damaged big time (!) At first I hoped only the C's, then the 5V regulator, but it turned out to be the main CPU that was dead. Felt also quite hot. The main CPU is located at the front PCB. You hardly see it. It tried here in the Netherlands at the local Yeasu, for a new front PCB or new front, but they didnt want to help (or offer it at the price of a brand new 817). Then I got help from Yaesu in the UK. Very friendly, and the shipped it I believe for something like 50 dollars. In any case much less as 500..600 for a new 817 ! On trick after that was to de-solder the old CPU and get the new one in. And: I got an old part, so have only 2 colors for the display, and I miss that 3rd bright nice color. Well, anything better as no 817. (wife would NOT allow spending again 600$ due to stupid me applying too much voltage to a new toy :-)) Hope this helps & Hope your CPU is NOT dead. ps1: I now have 2 diodes in the power supply cable to prevent wrong polarity. ps2: I do not complain about the 817, everything comes at a price, more safe/secure DC input design would have resulted in a higher price ! ps3: try a front from another HAM to trace down if you have the same issue. ps4: I also had to remove a C in the HF Amp, also that one caused a short. Henk, PA3GUO http://www.qsl.net/pa3guo ==================================== Hello all Managed to kill my 817 some time ago with a power spike from a dodgy power supply. Found some burnt components and tracks on the main board next to the ribbon cable leading to the front panel and LCD. This prevented the 12V from reaching the front panel. Did a small mod to get the 12V around this burnt track. Still no switch on from the 817. Then found another burnt component, the 5V regulator next to the power switch on the front panel PCB. Temporary replaced the 5v surface mount with a 7805 regulator, but still no joy. Beginning to think that a lot more must have been damaged by the power spike. Anyone out there got more of a service manual to try and track the fault? Otherwise anyone got an 817 that has damage elsewhere from which I could try and swop subparts / PCB to get mine working again? Regards Pieter ZS1PK

1 0

TS-2000X question
by i8cvs 25 Apr '08

25 Apr '08

Hi All, I got advise that the quality of modulation on 23 cm for the TS-2000X in SSB is not so good as in 2 meters and 70 cm. Any experience ? Tanks and 73" de i8CVS Domenico

1 0

Dish position pulse counter
by Phil 25 Apr '08

25 Apr '08

Thank you for reading this. While looking for something to do recently, I came across a project that I was working on four years ago. It's the basis of a PIC controller for a home-built satellite dish rotator. It's taken me the better part of a week to figure out what it's all about and I now remember one of the problems that slowed the pace of the project. I'm wondering if it's worth the effort of continuing. The PIC was counting pulses reasonably well from the elevation jack but was not always accurate because of noise pulses from the motor. I expect the larger azimuth rotator motor will produce even more hash. An accurate pulse count is important so as not to accumulate a large error towards the end of a satellite pass. Constant stopping and starting would probably add extra pulses too. Do home TV dish pointers use shielded cable to take the position pulses back to the controller? It's not something that I can test myself because my satellite gear is in storage more that 1100km from where I live. I'm having second thoughts about the pulse counting scheme and I'm beginning to think that the tried and proven ten-turn pot method might be more fool proof. Has anyone else had any success, or otherwise, with pulse counting? It's an interesting project but it might be impractical. Regards, Phil.

4 3

AMSAT Awards
by Bruce 25 Apr '08

25 Apr '08

We would like to welcome the following to the satellite community. They have made their first satellite contact and are now members of the AMSAT Satellite Communicators Club. University of Florida, Gator Amateur Radio Club, W4DFU The following have earned the AMSAT Sattelite Communications Achievement Award Clyde de Rossett, KI4CKT #462 University of Florida, Gator Amateur Radio Club, W4DFU #463 The following have earned the AMSAT South Africa Satellite Communications Achievement Award Dimitrios Pallis, SW1JGW #US120 University of Florida, Gator Amateur Radio Club, W4DFU #US121 To see all the awards visit http://www.amsat.org or http://www.amsatnet.com Bruce Paige, KK5DO AMSAT Director Contests and Awards ARRL Awards Manager (WAS, 5BWAS, VUCC), VE -- Bruce Paige, KK5DO AMSAT Director Contests and Awards ARRL Awards Manager (WAS, 5BWAS, VUCC), VE Houston AMSAT Net - Wed 0100z on SkyScanner Satellite Radio Network on Galaxy-25 @97° West, Transponder 23 (12115 Vert), Symbol Rate: 22425, APID: 1794 (DVB Free To Air) Also streaming MP3 at http://www.amsatnet.com Podcast at http://www.amsatnet.com/podcast.xml or iTunes Latest satellite news on the ARRL Audio News http://www.arrl.org

1 0