May 2018 - AMSAT-BB - mailman.amsat.org

AlfaSpid help
by John Fickes 20 May '18

20 May '18

Hello Group I'am currently replacing the motors on my AlfaSpid RAS and the azimuth motor is no problem but on the elevation motor there is what I call a hidden screw. It's tucked away down in the housing. you can see it and get a screwdriver to it,BUT, there is no slot for the screwdriver. The head is hollowed out as for a allen wrench,BUT, no hex for the wrench to grab. I don't think that it has been rounded out because I bought the rotor new and it's never been apart before by me. All the other attaching screws are flat headed screws so not sure why this one is different. Anyway I was wondering if anyone else has had any experience with this before ? Thanks John W0JW

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AO-92 L/v active...
by Andrew Glasbrenner 20 May '18

20 May '18

Commanded on at 0235Z 20MAY and will remain active for ~24 hours. Enjoy! 73, Drew KO4MA

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LongJiang 1 & 2 to be launched towards the Moon
by Nico Janssen 19 May '18

19 May '18

All, The two Chinese microsats LongJiang 1 & 2 are to be launched towards the Moon from Xichang on 2018-05-20 around 21:00 UTC. They carry radio amateur payloads with 2 m uplinks and 70 cm downlinks. Amateurs will be able to receive telemetry downlinks but will also be allowed to send telecommands for taking and downlinking pictures. There are also plans to enable FreeDV digital voice communications through these spacecraft. The two LongJiang satellites are planned to perform formation flying in a high elliptical orbit around the Moon (300 x 9000 km). After launch it will take about 4 and a half days to reach the Moon. This GMAT script should work well for the first days after launch: https://hamsat1.home.xs4all.nl/LongJiang_NYC.script The groundstation used in this script is a random location in New York City. You can change this to your location by updating the values under the GroundStation tab in GMAT. 73, Nico PA0DLO

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Re: [amsat-bb] AMSAT-BB Digest, Vol 13, Issue 168
by Todd W Deckard 19 May '18

19 May '18

mailing list bounced my pedantic response due to attached image size ... here’s a link to a parallel thread that has the image of ISS altitude over time. http://forums.qrz.com/index.php?threads/need-help-with-ascending-node.54930… Sent from my iPhone > On May 19, 2018, at 6:43 AM, Todd W Deckard <twdeckard(a)earthlink.net> wrote: > > As an aside, the ISS makes an adjustment approximately once a month. They operate at a higher altitude now that the shuttle is no longer used for resupply. Here is a plot from heavens-above. > > <image1.png> > > > I have observed that if you are using an Arduino or another processor with single precision math, the computed results age very quickly for any LEO and practically I must update every few days. > > if you are using a more respectable math engine and are only concerned about the orbital elements; the error in the satellite position is approximately a kilometer at the epoch of the TLE. Then the simplified perturbation model (SPG4) used by the common software we use loses about 1-2km a day. > > all of this is a bit pedantic if you are hand pointing an antenna in the noble tradition ... > > best > Todd > Sent from my iPhone > >> On May 18, 2018, at 9:51 PM, amsat-bb-request(a)amsat.org wrote: >> >> Send AMSAT-BB mailing list submissions to >> amsat-bb(a)amsat.org >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://www.amsat.org/mailman/listinfo/amsat-bb >> or, via email, send a message with subject or body 'help' to >> amsat-bb-request(a)amsat.org >> >> You can reach the person managing the list at >> amsat-bb-owner(a)amsat.org >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of AMSAT-BB digest..." >> Today's Topics: >> >> 1. Re: when are TLE's too old to use? (Gregory Beat) >> 2. Re: Recording TX & RX from one or two radios? (Mark D. Johns) >> 3. Re: when are TLE's too old to use? (skristof(a)etczone.com) >> 4. FUNcube-1 mode change (Jim Heck) >> 5. Falconsat With Wisp and Kenwood TS-200 Internal TNC >> (Vincenzo Mone) >> 6. Falconsat With Wisp and Kenwood TS-200 Internal TNC >> (Vincenzo Mone) >> 7. Falconsat With Wisp and Kenwood TS-200 Internal TNC >> (Vincenzo Mone) >> 8. Re: Recording TX & RX from one or two radios? >> (skristof(a)etczone.com) >> 9. Re: Recording TX & RX from one or two radios? (Ken M) >> 10. Re: Recording TX & RX from one or two radios? (John Brier) >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> <mime-attachment> >> _______________________________________________ >> Sent via amsat-bb(a)amsat.org. >> AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed >> are solely those of the author, and do not reflect the official views of AMSAT-NA. >> Not an AMSAT member? Join now to support the amateur satellite program! >> http://www.amsat.org/mailman/listinfo/amsat-bb

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urgent help from AMSAT members worldwide
by Tanan Rangseeprom 19 May '18

19 May '18

Dear Paul Stoetzer, Executive Vice President of Radio Amateur Satellite Corporation (AMSAT-NA) and member of AMSAT-BB The Radio Amateur Society of Thailand under patronage of His Majesty the King (RAST) would like to thank you for the SatPC32 program along with the Registration Code for the HS0AJ Ground Station. I and members of RAST along with the team building the JAISAT-1 satellite used your program to control the Rotor with a V/U antenna to work automatically in order to receive signals from amateur radio satellites that passed over Thailand. We have posted a video on YouTube of this, along with audio from an IC-9100 transceiver, which you can view by using the link below or by searching YouTube for the callsign HS0AJ. https://www.youtube.com/watch?v=ldjAA6e_Pjs We have made an application to the Thai regulator, the National Broadcasting and Telecommunications Commission (NBTC) to set up ground stations in different regions of Thailand in four locations, from North to South and with the following callsigns: 1. GS station in the North of Thailand, using the callsign HS0AN 2. GS station in the South using the callsign HS0AS 3. GS Station in the Northeast of Thailand using the callsign HS0AO 4. GS station in the Central region of Thailand with the callsign HS0AL We intend to post videos from all of these stations on YouTube, similar to those from HS0AJ, and we will establish ground stations all over the country in order to receive signals from satellites and to enable amateur radio operators and others in Thailand who are interested to access videos from these stations on YouTube. However, now we are seeking urgent help from AMSAT members worldwide because we are unable to contact the company Innovative Solutions In Space (ISIS) with which RAST had signed a contract to buy components for a U-class CubeSat but excluding the payload, being the Linear Transponder. Since the beginning of this year up until now we have been unable to contact ISIS, which is the reason for this appeal to you for urgent help in the purchase of components for the Flight Model of the 1U CubeSat satellite which is capable of carrying a payload of a Linear Transponder for RAST and which has been assembled and has passed the testing phase. Can anyone please provide some recommendations to us regarding the assembly of the satellite – and as quickly as possible? RAST and its members are lacking experience in satellite assembly and for the initial testing phase and we are appealing for suggestions as to where we can find suppliers of CubeSat components and as to who can test them and send the satellite out into space? For your consideration, please find some YouTube links about testing and building a Linear Transponder below: Thermal vacuum test https://www.youtube.com/watch?v=q8gebXAaj6M Vibration Test https://www.youtube.com/watch?v=6e02iOwZdM8 Design PCB https://www.youtube.com/watch?v=z61l6r1AtQo https://www.youtube.com/watch?v=lBwMD5y3nns https://www.youtube.com/watch?v=bSb86DushF8 https://www.youtube.com/watch?v=1fXePZ-L86M 3D of JAISAT-1 Satellites https://www.youtube.com/watch?v=TNqO_3Q9vxo JITTER OF LOCAL OSCILLATOR 190MHz and 390MHz https://www.youtube.com/watch?v=IrSpHzPD-Y8 Sincerely and with respect, Tanan Rangseeprom

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Recording TX & RX from one or two radios?
by Bill Acito 18 May '18

18 May '18

[[I haven't done this yet but I think others have and I plan to do it one day: most recorders are stereo. Get a *channel* splitter (I bought one on Amazon) and send radio audio to left channel, say, and an external mic to right.]] I have been doing this for years. The key/trick is that you have to insert a 40db pad on the rig audio side because the audio levels (mic vs rig) are very different. Most audio recorders use a AGC of some sort, and with no balancing L to R, the AGC will adjust for the stronger rig audio, and lower its overall sensitivity so you won't hear the mic channel. Inserting the 40db pad balances the left and right and will give you good audio on both sides. Bill W1PA

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Falconsat With Wisp and Kenwood TS-200 Internal TNC
by Vincenzo Mone 18 May '18

18 May '18

Hi folks, Is there any one that uses the Kenwood TS-2000 and Wisp Using the internal TNC to RX/TX on Falconsat-3? I cannot get success. I can RX but cannot TX since there is the signal. Please can somebody give me the correct settings. Actually I have the following settings in the radio: Menu 46 SUB Menu 47 9600Bps Menu 48 TNC BAND Menu 55 On On the main band I have set the TX frequency 145.840 FM for the Uplink and On the Sub Band the RX Frequency 435.103 FM for the Downlink. The PTT is set on the maid band. When the MSPE program starts, I can see the STA and CON LEDs flashing for three times That indicates the radio is gone in kiss mode. I can see the data coming in, but when I go to request the directory or a message the radio does not Go in TX since there is no signal on the SUB band but it TX on the SUB Band instead to TX on the Main one. Vice versa if while I am receiving, I go to request the directory or a message the radio does not go in TX since there is no signal on the SUB band, But if I entry in the menu 46 and change for a second from SUB to MAIN the radio goes TX and it goes on the correct Band the Main Which is set for the Uplink then I have to switch back the Menu 46 from MAIN to SUB again otherwise I will not get anymore the incoming data. Please what am I doing wrong or which settings is wrong in the radio? Please any help will be really appreciated. 73's de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520 ************************************* ******* GSM +39 328 7110193 ******* ****** SMS +39 328 7110193 ****** *************************************

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Falconsat With Wisp and Kenwood TS-200 Internal TNC
by Vincenzo Mone 18 May '18

18 May '18

Hi folks, Is there any one that uses the Kenwood TS-2000 and Wisp Using the internal TNC to RX/TX on Falconsat-3? I cannot get success. I can RX but cannot TX since there is the signal. Please can somebody give me the correct settings. Actually I have the following settings in the radio: Menu 46 SUB Menu 47 9600Bps Menu 48 TNC BAND Menu 55 On On the main band I have set the TX frequency 145.840 FM for the Uplink and On the Sub Band the RX Frequency 435.103 FM for the Downlink. The PTT is set on the maid band. When the MSPE program starts, I can see the STA and CON LEDs flashing for three times That indicates the radio is gone in kiss mode. I can see the data coming in, but when I go to request the directory or a message the radio does not Go in TX since there is no signal on the SUB band but it TX on the SUB Band instead to TX on the Main one. Vice versa if while I am receiving, I go to request the directory or a message the radio does not go in TX since there is no signal on the SUB band, But if I entry in the menu 46 and change for a second from SUB to MAIN the radio goes TX and it goes on the correct Band the Main Which is set for the Uplink then I have to switch back the Menu 46 from MAIN to SUB again otherwise I will not get anymore the incoming data. Please what am I doing wrong or which settings is wrong in the radio? Please any help will be really appreciated. 73's de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520 ************************************* ******* GSM +39 328 7110193 ******* ****** SMS +39 328 7110193 ****** *************************************

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Falconsat With Wisp and Kenwood TS-200 Internal TNC
by Vincenzo Mone 18 May '18

18 May '18

Hi folks, Is there any one that uses the Kenwood TS-2000 and Wisp Using the internal TNC to RX/TX on Falconsat-3? I cannot get success. I can RX but cannot TX since there is the signal. Please can somebody give me the correct settings. Actually I have the following settings in the radio: Menu 46 SUB Menu 47 9600Bps Menu 48 TNC BAND Menu 55 On On the main band I have set the TX frequency 145.840 FM for the Uplink and On the Sub Band the RX Frequency 435.103 FM for the Downlink. The PTT is set on the maid band. When the MSPE program starts, I can see the STA and CON LEDs flashing for three times That indicates the radio is gone in kiss mode. I can see the data coming in, but when I go to request the directory or a message the radio does not Go in TX since there is no signal on the SUB band but it TX on the SUB Band instead to TX on the Main one. Vice versa if while I am receiving, I go to request the directory or a message the radio does not go in TX since there is no signal on the SUB band, But if I entry in the menu 46 and change for a second from SUB to MAIN the radio goes TX and it goes on the correct Band the Main Which is set for the Uplink then I have to switch back the Menu 46 from MAIN to SUB again otherwise I will not get anymore the incoming data. Please what am I doing wrong or which settings is wrong in the radio? Please any help will be really appreciated. 73's de Enzo IK8OZV EasyLog 5 BetaTester EasyLog PDA BetaTester WinBollet BetaTester D.C.I. CheckPoint Regione Campania Skype: ik8ozv8520 ************************************* ******* GSM +39 328 7110193 ******* ****** SMS +39 328 7110193 ****** *************************************

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Re: [amsat-bb] when are TLE's too old to use?
by Gregory Beat 18 May '18

18 May '18

???? Clint, I have been working satellites since Oscar 6, when I was in high school. Worked STS-9 (Owen Garriott, Spacehab-1) when I was in graduate college. No need for education or evangelizing. 73. greg, w9gb AMSAT-NA, AMSAT-UK Sent from iPad Air > > On May 17, 2018, at 8:43 PM, Clint Bradford <clintbrad4d(a)earthlink.net> wrote: > > If you are working the ISS (fruitless right now), I would update every week, because > they re-position themselves a couple times a month. NOTHING drastic, but that is > where the slight difference is from week-to-week. > > And since you’re updating already, snag ‘em all (grin). > > If not working the ISS - every couple weeks or up to a month is fine. > > Clint K6LCS > http://www.work-sat.com > 909-999-SATS

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