June 2017 - AMSAT-BB - mailman.amsat.org

(no subject)
by jeffory broughton 08 Jun '17

08 Jun '17

MGF1302 OR MGF1402 GAASFET TRANSISTORS WILL WORK.I HAVE FOUND THE 1302 TO BE A BETTER DEVICE. JEFF WB8RJY.your swr issue sounds like a relay contact. jeff broughton

1 0

NO-84?
by skristof＠etczone.com 08 Jun '17

08 Jun '17

What happened to NO-84? It's not in the pull down menu in the AMSAT Online Pass Predictor. Steve AI9IN

2 1

Landwehr pre amp
by Jeff Griffin 08 Jun '17

08 Jun '17

Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just got around to setting them up in my station in NJ. Both are DOA, so now I'm trying to fix them. Does anyone know where I can get a schematic, or anyone that can fix these that has the parts. Both units relay are function 100%, issue is with the rx on both units. The 70cm one shows hi SWR and low RX, the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm not sure these are available anymore on the open market.. 73 Jeff kb2m

4 5

Controlling WRAPS Rotor
by David Rush 08 Jun '17

08 Jun '17

Last year I built WA8SME's WRAPS rotor to use with my Arrow antenna, and it works fine with SatPC32 (set up as SAEBRTrackBox). Has anyone ever been able to control such a rotor with anything other than SatPC32? I'd rather use my Mac to drive this thing than drag out an old laptop with Windows, but I cannot get either MacDoppler or gpredict to drive it. No obvious errors, but the WRAPS never responds to either one. Still works fine with SatPC32. I've tried setting MacDoppler (and gpredict, IIRC) to both EasyCom I and EasyCom II at 9600 bps, with no success. Mark's documentation says it uses EasyCom. David, ky7dr

1 0

Upcoming ARISS Contact Schedule as of 2017-06-08 16:00 UTC
by AJ9N＠aol.com 08 Jun '17

08 Jun '17

Upcoming ARISS Contact Schedule as of 2017-06-08 16:00 UTC Quick list of scheduled contacts and events: Greater Niagara Frontier Council BSA, Buffalo, NY, telebridge via ON4ISS (***) The ISS callsign is presently scheduled to be OR4ISS (***) The scheduled astronaut is Fyodor Yurchikhin RN3FI (***) Contact is a go for: Sat 2017-06-10 16:18:48 UTC 88 deg (***) Space Center Houston, Houston, TX, telebridge via ON4ISS The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is Jack Fischer K2FSH Contact is a go for: Tue 2017-06-13 15:19:26 UTC 84 deg **************************************************************************** ** ARISS is always glad to receive listener reports for the above contacts. ARISS thanks everyone in advance for their assistance. Feel free to send your reports to aj9n(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz. **************************************************************************** *** All ARISS contacts are made via the Kenwood radio unless otherwise noted. **************************************************************************** *** Several of you have sent me emails asking about the RAC ARISS website and not being able to get in. That has now been changed to http://www.ariss.org/ Note that there are links to other ARISS websites from this site. **************************************************************************** Looking for something new to do? How about receiving DATV from the ISS? If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Satoshi 7M3TJZ with 123 Gaston ON4WF with 123 Francesco IKØWGF with 119 **************************************************************************** The webpages listed below were all reviewed for accuracy. Out of date webpages were removed and new ones have been added. If there are additional ARISS websites I need to know about, please let me know. Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time. All dates and times listed follow International Standard ISO 8601 date and time format YYYY-MM-DD HH:MM:SS The complete schedule page has been updated as of 2017-06-08 16:00 UTC. (***) Here you will find a listing of all scheduled school contacts, and questions, other ISS related websites, IRLP and Echolink websites, and instructions for any contact that may be streamed live. http://www.amsat.org/amsat/ariss/news/arissnews.rtf http://www.amsat.org/amsat/ariss/news/arissnews.txt Total number of ARISS ISS to earth school events is 1142. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1101. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 47. A complete year by year breakdown of the contacts may be found in the file. http://www.amsat.org/amsat/ariss/news/arissnews.rtf Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: Arkansas, Delaware, South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: http://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** The successful school list has been updated as of 2017-06-01 08:00 UTC. http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction .rtf Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC. http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 50 on orbit Peggy Whitson Thomas Pesquet KG5FYG Oleg Novitskiy Exp. 51 on orbit Jack Fischer K2FSH Fyodor Yurchikhin RN3FI **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 0

Dimensions of AO-13
by Stewart Todd Morgan 08 Jun '17

08 Jun '17

See "Spotlight On: AMSAT-OSCAR-13" by John A. Magliacane, KD2BD: https://web.archive.org/web/19961028042702/http://amsat.org:80/amsat/sats/n… Todd AL0I

4 5

Is this common? Better audio w/ delay before speaking?
by Scott 07 Jun '17

07 Jun '17

Hey everybody! I had a very high pass of LilacSat-1 tonight and took the opportunity to try to see how I could improve the percentage of my transmissions that the satellite would digitize & repeat onto the downlink. Wei from the project team at Harbin was kind enough to call to my attention that there should be a short delay ("a few hundred ms") before speaking so that the CTCSS decode could process. Following that period, the audio on the uplink would be passed on to the satellite's receiver. As I tested various techniques while transmitting tonight, it became pretty obvious that I was getting MUCH better audio on the downlink with a full 2-second delay before speaking when I keyed the mic. I was just wondering if anything like this had been seen on other satellites over the years. (or land-based systems, for that matter) I realize that we're treading on new ground with this satellite processing the uplink audio with an on-board computer for transmission as a data stream on the downlink, but the front-end is still dealing with a standard FM carrier and PL, so I was curious if a longer-than-expected delay had possibly been seen elsewhere over the years. Just trying to learn as I go. Thanks for any feedback. Here's a sample of the quality of downlink I was seeing with that 2-second delay: http://www.qsl.net/k4kdr/files/2017-06-07--0334--LilacSat-1--audio.mp3 -Scott, K4KDR

1 0

Special Thanks
by Mike Diehl 06 Jun '17

06 Jun '17

I wanted to send a special thanks to everyone who helped out with donations for my recent grid expedition to DM02. I know some asked to remain anonymous so I'll just keep them all that way. Many thanks for helping out, I had a great time working everyone I could and it was an experience I won't forget. 73, Mike Diehl AI6GS

1 0

Alaska Cruise
by Glenn Miller - AA5PK 06 Jun '17

06 Jun '17

All QSOs from my AK cruise have been uploaded to LoTW. QSOs from CO28 (Juneau) were logged as AA5PK/KL7 All others were logged as AA5PK/VP9/MM Hard copy QSLs by email request. 73 Glenn AA5PK

1 0

Full Duplex Packet Modem Programs?
by Alan 06 Jun '17

06 Jun '17

I am working on a project which requires full duplex at 9600 baud. MixW is one program which does supports this. I am interested in any other readily available (free) programs which do so, and from experience are KNOWN to work correctly. Direwolf? AGWPE? Soundmodem? ??? 73s, Alan WA4SCA

1 0