AMSAT-BB November 2007

170 participants
297 discussions

Ampire 146-OS pre-amp schematic?
by Michael Pfeuffer 08 Nov '07

08 Nov '07

Hi all, Does anyone happen to have a schematic for an Ampire 146-OS pre-amp? I'm trying to identify the GaAs FET it uses. Thanks, Mike WQ5C

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rs-15 constructor
by Auke de Jong, VE6PWN 08 Nov '07

08 Nov '07

How might I be able to find and contact the group responsible for the creation of RS-15? auke VE6PWN

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Re: Data on the Sats
by John Marranca, Jr 08 Nov '07

08 Nov '07

Good Evening Satellite Jockeys: I think Hellschreiber would be GREAT via satellite, as it's probably my favorite "digital" mode when running HF. (Once upon a time, I could be found on 40 meter Hell DAILY). Perhaps if/when the GEOSYNC sat is a reality, these types of activities will be commonplace. Let's hope. John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA Local 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

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SSET via ISS
by Robert Bruninga 08 Nov '07

08 Nov '07

ISS Packet is back on the air on 145.825 with PCSAT and ANDE, giving over a dozen satellite access windows per day for packets transmitted on 145.825. You can send your Satellite Simulated Emergency Test message via any of these satellites as deomonstrated below by Paulo getting his message out via the ISS: > Hello Bob, once again from CT2IWW. > > I was sucessfull in getting an SSET email > digipeated via the ISS, this morning. > Here's a copy of the message as received > by email: > ---------------------------------------------- > > /sset message test via iss 12:14z > > ---------------------------------------------- > Message received by MacAPRS IGate station WU2Z > Located in NO BRUNSWICK, NJ > APRS path = CT2IWW>CQ,RS0ISS-4*,WIDE2-2,qAO,EA4EKH-6 > ---------------------------------------------------- > > / Any idea what is that qAO in the path? The callsign after the qao construct is the callsign of the SATgate that heard the packet and injected it into the global APRS Internet channel. When any APRS Igate injects any packet into the APRS-IS, the path is modified with the QAO construct and the callsign of the Igate station. Bob, WB4APR

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Data on Sats
by Eric H Christensen 08 Nov '07

08 Nov '07

Has anyone or does anyone use RTTY or PSK31 or the like on any of the linear birds? 73s, Eric W4OTN

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Re: Data on Sats
by Andrew Glasbrenner 08 Nov '07

08 Nov '07

Some of us have played with Hellschrieber on AO-40, AO-7, FO-29, and VO-52. It is very low tech, but very doppler tolerant. 73, Drew KO4MA -----Original Message----- >From: Eric H Christensen <eric(a)christensenplace.us> >Sent: Nov 8, 2007 9:56 AM >To: amsat-bb(a)amsat.org >Subject: [amsat-bb] Data on Sats > >Has anyone or does anyone use RTTY or PSK31 or the like on any of the linear birds? > >73s, >Eric W4OTN >_______________________________________________ >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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IC-910 Pre-amp Problem
by Steve kb9ups 08 Nov '07

08 Nov '07

Hello all, I have an IC-910. Just tried to power up the Icom pre-amps with No Luck.. I set pre-amps to "on", pushed the button and "?". The display indicator flashes 5 times and goes out..no power. Tried the amps on my other 910 and they work great and the indicator stays on...both bands. Does anyone know what may be wrong with the 910? Steve/kb9ups ARISS Mentor AMSAT area coordinator, Toledo, Oh. AMSAT area coordinator, Streator, IL. www.qsl.net/kb9ups _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

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IC-910 pre-amp Problem
by Steve kb9ups 08 Nov '07

08 Nov '07

Thanks everyone! In taking a look see inside..I found a burnt part (ouch). On the B5573L board "PA unit", part L720 behind the 144 antenna connector, a coil, is burnt. I guess the owner didn't tell me everything about his year old, still under warranty rig.. I hope that's all I find..but should I look elswhere? Steve/kb9ups ARISS Mentor AMSAT area coordinator, Toledo, Oh. AMSAT area coordinator, Streator, IL. www.qsl.net/kb9ups _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

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FO-29 schedule Nov.
by Mineo Wakita 08 Nov '07

08 Nov '07

Nov. UTC 13 3:35 - 14 4:26 - 15 3:33 - 16 4:22 - 17 3:27 - 18 none 19 none 20 4:13 - 21 3:18 - 22 4:08 - 23 3:13 - 24 none 25 3:10 - 26 none 27 3:05 -, 4:50 - 28 3:55 - 29 3:00 -, 4:45 - 30 3:50 de JE9PEL, Mineo Wakita

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Possible source of QRM on AO-51
by andy thomas 08 Nov '07

08 Nov '07

Those of us in N Europe suffer from qrm on AO51, southbound from the poles, from fm transmitters thought to be in N Russia. I have just come back from China, where thanks to Michael and others, I met the Shandong ARS in Jinan. Amongst other hospitalities, the group took me to a street selling handhelds as well as other stuff like mobile phones, mobiles and I think repeaters. There I bought a VHF handheld for 180 RMB, about £12 UK or $26. (Including battery, charger, belt clip and antenna!) This promises 2.5 W out into keyboard entry and/or stored channels, either simplex or separate tx/rx. The model has the PU HUANG brand name, model PG5118 and covers 140 to 170 MHz, no tone or ctcss. The keyboard entry will only accept 5khz steps. The company name is Guang Yuan Electronic Co Ltd; I can't read the address -it's in Chinese - but was told it was made 100km from Xiamen in Fujian province. The instructions offer bands as follows: 145-175, 150-170,136-`74, 200-270,400-420,430-450,450-470, 400-470 MHz. Other handhelds on sale in Jinan covered 70cms and the 145-175 and 450-470 MHz bands - these were more common. In Beijing at the Silk market (4th floor) there were a few stalls selling "Walky talkies" with the same frequencies, and they recommended a "Chinese Kenwood" that looked like my Pu Huang but had Kenwood written on it instead. They had other "Kenwoods" and "Motorolas" but your guess is as good as mine. Another name is Bei Feng (BF) and their address is: Fujian Quanzhou BeiFeng Telecom Sytsems Ltd http://www.bfdx.com email: beidian(a)pub2.qz.fj.cn Also in Beijing I got hold of some flyers for the HONGO range produced by the Fujian Quanzhou Hongda Electron Industry Ltd. Specs are: HD-45AT : 136-174, 400-430 0r 440-470, 4/5w, ctcss, 12.5 khz channels. A-88: : same bands, 2.5w, no ctcss, 12.5 khz channels. HD-8800:400-470,no ctcss, QT/DQT (don't know what that is),5w, 12.5 khz steps. What's all this got to do with AO-51, well the box my Pu Guang came in is written in Chinese, English -and Russian. The Russian reads "Seriiniaya osobennaya vnutrisvyazhaya sistema" (I'm transliterating from the cyrillic) which reads something like "serial personal home system" - I'll get a better transaltion from my Russian tutor tonight. So I conclude that these sets are being sold on the Russian domestic market - why else write in Russian on the box? And they are therefore a strong candidate for the FM uplink qrm on AO-51 when the ctcss access is off. Finally, looking at all the above specs., while some of them do have ctcss, and they could have 5 or 12.5 or 25 kHz steps, none have the odd 6.25 kHz steps. Maybe future FM sat builders could get around unintentional qrm this way? If anyone wants a scan of the "manual" or flyers please email me off the list. 73 de andy G0SFJ ___________________________________________________________ Want ideas for reducing your carbon footprint? Visit Yahoo! For Good http://uk.promotions.yahoo.com/forgood/environment.html

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AMSAT-BB November 2007