August 2016 - AMSAT-BB - mailman.amsat.org

High side current sensor chips?
by Robert Bruninga 22 Aug '16

22 Aug '16

What are people using on their cubesats (etc) for current sensors? The MAX-471 we have been using since 2001 (PCSAT) in all our designs are now obsolete. We want a chip with internal shunt and up to say 2 amps or so. Bob, WB4APR

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NO84 APRS
by John Marranca, Jr 22 Aug '16

22 Aug '16

I have been interested in the PSAT NO84 satellite. The downlink of 145.825 is mentioned in many places. Is the uplink ALSO 145.825 MHz???

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CY9C Update
by K4FEG 22 Aug '16

22 Aug '16

Hello All: Fresh from *Pat, N2IEN*, a status report on the *CY9C* operations from *Sable Island*. I am sure most of you know that they have had high winds & sustained antenna systems damage, here is Pat's update this morning: /To: W2JV// //Subject: CY9C // //// //Pete--an update on LEO. We've had some setbacks. First, there were logistical issues getting people to this uninhabited Island and dealing with setting up under difficult conditions. Then last night a storm hit. Took out our EME array and knocked down the partially assembled sat yagis. Our G5500 suffered some damage. Not sure of its status; we're about to get some high winds again so we put it away. Soon as wx clears we'll test it. If it's toast, we might be able to use the G5500 from the EME setup. Worse comes to worse, I'll use the Arrow. Please pass this info on to AMSAT members. // //Thanks! // //73 Pat N2IEN / This may or may not result in limited satellite operations. /*Stay Tuned folks,*//* *//*73*//* *//*K4FEG*/

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Re High side current sensor chips?
by David G0MRF 22 Aug '16

22 Aug '16

Hi Bob. We have used numerous INA194 chips from Texas Instruments. They run from the supply that's being monitored. Can send the circuit and layout image if you wish David G0MRF What are people using on their cubesats (etc) for current sensors? The MAX-471 we have been using since 2001 (PCSAT) in all our designs are now obsolete. We want a chip with internal shunt and up to say 2 amps or so. Bob, WB4APR

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Fw: CY9C
by W2JV 22 Aug '16

22 Aug '16

Update from CY9C: Pete--an update on LEO. We've had some setbacks. First, there were logistical issues getting people to this uninhabited Island and dealing with setting up under difficult conditions. Then last night a storm hit. Took out our EME array and knocked down the partially assembled sat yagis. Our G5500 suffered some damage. Not sure of its status; we're about to get some high winds again so we put it away. Soon as WX clears we'll test it. If it's toast, we might be able to use the G5500 from the EME setup. Worse comes to worse, I'll use the Arrow. Thanks! 73 Pat N2IEN 73’s Peter W2JV

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unsubscribe
by Don Pittman 22 Aug '16

22 Aug '16

Please unsubscribe this email address from the list thank you. Donald Pittman WB8ZOM

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Re: [amsat-bb] EsHail Microwave transponder satellite_ 2.4 Ghz / 10.5 Ghz dual-band feed
by Daniel Cussen 22 Aug '16

22 Aug '16

I have documented the new combined feed for EsHail from Germany. Coverage is not available in North America but for everyone else .... http://www.batc.org.uk/forum/viewforum.php?f=101 There is a DIY version (prototype) here: http://remco.org/index.php/2016/06/03/eshail2-dual-band-dish-feed/ Dan EI9FHB

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FUNcube-1 Mode change
by Graham Shirville 21 Aug '16

21 Aug '16

Hi All, I can report that FUNcube-1 is now autonomously switching between sunlight and eclipse operation. Full time transponder operation should resume next weekend. 73 Graham G3VZV

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FCC Part 97 Regulations on transmission of music
by Tony Stone 21 Aug '16

21 Aug '16

I have edited out all non music related parts. Part 97 : Sec. 97.113 Prohibited transmissions (a) No amateur station shall transmit: (4) Music using a phone emission except as specifically provided elsewhere in this section; communications intended to facilitate a criminal act; messages encoded for the purpose of obscuring their meaning, except as otherwise provided herein; obscene or indecent words or language; or false or deceptive messages, signals or identification. (c) No station shall retransmit programs or signals emanating from any type of radio station other than an amateur station, except propagation and weather forecast information intended for use by the general public and originated from United States Government stations, and communications, including incidental music, originating on United States Government frequencies between a manned spacecraft and its associated Earth stations. Prior approval for manned spacecraft communications retransmissions must be obtained from the National Aeronautics and Space Administration. Such retransmissions must be for the exclusive use of amateur radio operators. Propagation, weather forecasts, and manned spacecraft communications retransmissions may not be conducted on a regular basis, but only occasionally, as an incident of normal amateur radio communications. [58 FR 43072, Aug. 13, 1993; 58 FR 47219, Sept. 8, 1993, as amended at 71 FR 25982, May 3, 2006; 71 FR 66462, Nov. 15, 2006; 75 FR 46857, Aug. 4, 2010] Tony Stone w4tas(a)gte.net

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Amateur Radio BIRDS CubeSat Constellation
by David G0MRF 21 Aug '16

21 Aug '16

Hi Steve. It's certainly one of the 3 or 4 types of content that is prohibited in the UK. I can't imagine that the Japanese would allow it either. Probably OK as a file transfer, but not as analog FM on amateur radio spectrum. Hopefully if this is declared as one of the mission objectives in the frequency coordination request the applicants would have been advised against it and the application put on hold. On the other hand.....Imagine the payment due to the performers of the music if the fee assessment is based on 'total audience in the broadcast area' !! Could make the cost of the satellite seem insignificant. Regards David G0MRF Saw this in today's AMSAT newsletter: " A particularly interesting mission of BIRDS project is the SNG mission that exchanges music via a digi-singer. It is an outreach-oriented mission. First, music in MIDI format is uploaded from ground. Then the MIDI file is processed on-board using a vocal synthesizer. Finally, the processed music is sent back to Earth using UHF antenna as voice FM data. " Isn't music transmission prohibited in the United States amateur radio service? Steve AI9IN

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