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silence_kit posted:Actually, this is done all of the time in electronics to reject radio interference in cables. You probably own multiple cables with crystals (well, the material is polycrystalline, not single crystalline) attached to them. No, this is not done all of the time in electronics. It doesn't reject poo poo. 
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Apr 19, 2016 16:35
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Phanatic posted:No, this is not done all of the time in electronics. It doesn't reject poo poo. I'm just saying that attaching ferrite crystals to cables is actually done all of the time in electronics. To someone who doesn't know very much about electronics, it sounds stupid like the $800 wood block thing in the link, but it's actually very common.
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Apr 19, 2016 16:59
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silence_kit posted:I'm just saying that attaching ferrite crystals to cables is actually done all of the time in electronics. To someone who doesn't know very much about electronics, it sounds stupid like the $800 wood block thing in the link, but it's actually very common. Ferrite chokes aren't made from crystalline ferrite - it's a ceramic ferrous material. E: more importantly, the reason they work is because they're ferromagnetic, not because of any crystalline structure.
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Apr 19, 2016 17:29
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silence_kit posted:I'm just saying that attaching ferrite crystals to cables is actually done all of the time in electronics. To someone who doesn't know very much about electronics, it sounds stupid like the $800 wood block thing in the link, but it's actually very common. Yes but taping a bag of random rocks to your audio jack is not going to make anything sound better.
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Apr 19, 2016 18:38
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Kalman posted:Ferrite chokes aren't made from crystalline ferrite - it's a ceramic ferrous material. In my first post on the subject, I said that ferrite is probably polycrystalline. Yes, a big reason why ferrites are popular in electronics is because they are strongly magnetic. I never attributed the use of ferrites to their phase. Unlike many magnetic materials, many types of ferrites aren't very good conductors of electricity. This second property is also a huge reason why they are so popular. silence_kit fucked around with this message at 20:35 on Apr 19, 2016 |
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Apr 19, 2016 20:30
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silence_kit posted:Actually, this is done all of the time in electronics to reject radio interference in cables. You probably own multiple cables with crystals (well, the material is polycrystalline, not single crystalline) attached to them. We're not talking about actual attachment to cables though, scammy poo poo like this is placed next to the cables in a little box or a little baggie. And it's very likely that the scam crystals are not magnetic
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Apr 19, 2016 21:07
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 This is a shielded cable. It's suited for a variety of tasks but in my field we tend to use it either for control signals or 3 phase motors hooked up to a frequency modulator. It basically works by creating a faraday cage around the wires to keep out signal noise. In a signal cable it's useful if you're running signals next to power cables since the 'noise' can cause errant signals to manifest create ghost signals that would interfere in a PLC controlled system. With frequency modulators it's used to protect everything around it since they create a fuckton of noise. Crucially, they only work if the metal shield is hooked up to an earth on both ends so hooking up any kind of extra around an audio cable is going to do gently caress and all.
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Apr 19, 2016 22:10
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Demiurge4 posted:
A lot of audio cables are cheap and unshielded.
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Apr 19, 2016 22:18
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Demiurge4 posted:
Ferrite chokes on shielded cables are used to account for non-idealities (like unequal return current) that can result in an outer-skin common mode high frequency current. They're less common there but they do actually serve a function.
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Apr 19, 2016 22:22
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CommieGIR posted:A lot of audio cables are cheap and unshielded. Sure, but that doesn't make exterior gadgets anything more than useless. The only way to protect an unshielded cable is to run it alone.
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Apr 19, 2016 22:23
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Demiurge4 posted:Sure, but that doesn't make exterior gadgets anything more than useless. The only way to protect an unshielded cable is to run it alone. True. And ferrite chokes do very little to audio signals I suspect...
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Apr 19, 2016 22:29
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As the son of a ham radio operator who enjoyed using his computer and listening to music as a kid, I assure you ferrite chokes are at least somewhat effective.
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Apr 19, 2016 22:40
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CommieGIR posted:True. And ferrite chokes do very little to audio signals I suspect... A big enough one will.
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Apr 19, 2016 23:13
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Kalman posted:A big enough one will.  We're talking about your average choke. Not a huge fuckoff choke.
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Apr 19, 2016 23:20
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CommieGIR posted:
Definitely - a normal choke won't affect audio. A huge fuckoff choke will kill just about anything.
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Apr 19, 2016 23:24
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Kalman posted:Definitely - a normal choke won't affect audio. Naturally.
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Apr 19, 2016 23:25
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Pander posted:Which shouldn't be a problem, since methane isn't a byproduct of burning natural gas. It's possible it's been resolved by now (unlikely, but I last read about this a month or two ago), but the Barnett Shale operations in Texas are releasing more methane per hour than the leak in CA.
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Apr 19, 2016 23:49
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My PhD just burst into flames while reading this stupid derail.
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Apr 21, 2016 05:06
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ANIME AKBAR posted:My PhD just burst into flames while reading this stupid derail. I have some crystals you can tape to your PhD that will help with that. $500 a pop
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Apr 21, 2016 05:52
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There's never a bad time to learn about audio cables.
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Apr 21, 2016 05:57
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ANIME AKBAR posted:My PhD just burst into flames while reading this stupid derail. You can always go to your e-mail and print off another one
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Apr 21, 2016 07:20
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QuarkJets posted:You can always go to your e-mail and print off another one No you see my PhD was forged from paper from the mightiest Sequoia of Yosemite and inked with noble metals of the greatest purity. It silently hovers five feet above the floor and resonates at a perfect 440Hz.
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Apr 21, 2016 13:19
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Burning PHD dude you should call up your nearest energy research facility and let them know that you're going to listen to this because I think it might unlock the secret of sustained fusion via your PHD.
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Apr 21, 2016 13:19
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Anos posted:There's never a bad time to learn about audio cables. Or to make choke jokes.
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Apr 21, 2016 16:39
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ANIME AKBAR posted:My PhD just burst into flames while reading this stupid derail. All I did is say that the idea of attaching stuff to the outside of cables to improve signal integrity is actually not a such a bad idea after all. In fact, it is such a good idea that many of the cables that you use in consumer electronics have ferrite beads on them. Then, as is common in this thread, posters misconstrued my post and replied with a bunch of knee-jerk responses because on its face my post violated the Dogma of Internet Science Fanboyism.
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Apr 21, 2016 20:24
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silence_kit posted:All I did is say that the idea of attaching stuff to the outside of cables to improve signal integrity is actually not a such a bad idea after all. In fact, it is such a good idea that many of the cables that you use in consumer electronics have ferrite beads on them. It's because you said that in reaction to people talking about literally random cheap crystals being attached to things
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Apr 21, 2016 20:32
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silence_kit posted:All I did is say that the idea of attaching stuff to the outside of cables to improve signal integrity is actually not a such a bad idea after all. In fact, it is such a good idea that many of the cables that you use in consumer electronics have ferrite beads on them. "It is a good idea to attach properly engineered and well-constructed stuff" has nothing to do with "dumb audiophiles duct tape baggies of random crystals and rocks to cables"
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Apr 21, 2016 20:44
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I CANNOT EJACULATE WITHOUT SEEING NATIVE AMERICANS BRUTALISED!
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silence_kit posted:All I did is say that the idea of attaching stuff to the outside of cables to improve signal integrity is actually not a such a bad idea after all. In fact, it is such a good idea that many of the cables that you use in consumer electronics have ferrite beads on them. You're not wrong, but this D&D and dadchat is leaking.
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Apr 21, 2016 23:01
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silence_kit posted:All I did is say that the idea of attaching stuff to the outside of cables to improve signal integrity is actually not a such a bad idea after all. In fact, it is such a good idea that many of the cables that you use in consumer electronics have ferrite beads on them. What you did is akin to arguing that magnetic healing bracelets are actually good and useful because magnets are used in MRI machines
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Apr 22, 2016 00:10
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Or at least adding to a conversation about magnetic healing bracelets by saying that actually magnets are used in MRI machines and that is good, but possibly not wishing to imply that there is a link between that assertion and magnetic healing bracelets. Either way it's very confusing.
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Apr 22, 2016 00:42
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You say homeopathy is a useless or even potentially dangerous pseudoscience but as a medical professional I can actually tell you that water is actually important in health. In fact doctors often tell patients to "get plenty of fluids". Makes you think.
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Apr 22, 2016 00:47
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ITT: rocks as chokes ridiculed with homeopathy 
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Apr 23, 2016 01:01
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I thought this was interesting, coal usage by state for electric power, compared between 2007 and 2015: Notice that only Alaska and Nebraska increased their usage over the past 8 full years of data.
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May 10, 2016 20:44
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NY and Georgia are pretty big changes too. How did New York make up a 90% reduction in coal, especially with Vermont Yankee closing? e. nevermind guessing natural gas.
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May 10, 2016 20:50
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Pander posted:NY and Georgia are pretty big changes too. How did New York make up a 90% reduction in coal, especially with Vermont Yankee closing? Natural gas and increased imports (mostly from Quebec I think?). Note that these are the coal used inside the state for power directly, not all the coal used by suppliers to the state whether in the state or outside of it. That'd be a lot harder to measure. Georgi's going to be interesting the next time the EIA puts out a similar report, because at least one new nuclear reactor will be online there in the next couple years, and Southern Company is expected to use that to mothball some of their coal capacity in the state. fishmech fucked around with this message at 20:55 on May 10, 2016 |
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May 10, 2016 20:53
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Looks like the first commercial scale project for a 50MW rail based energy storage project is going ahead in Nevada. They're planning to make a profit selling ancillary services. The exciting part about this is the tech is pretty simple and scalable and with this smaller project priced a little above $1M per MW, potentially more cost effective at higher scales. http://www.vox.com/2016/4/28/11524958/energy-storage-rail irl testbed -  fancy cgi envisioning - 
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May 10, 2016 21:07
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Trabisnikof posted:Looks like the first commercial scale project for a 50MW rail based energy storage project is going ahead in Nevada. They're planning to make a profit selling ancillary services. The exciting part about this is the tech is pretty simple and scalable and with this smaller project priced a little above $1M per MW, potentially more cost effective at higher scales. That is a lot of damned windmills. And only 50 MW?
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May 10, 2016 21:10
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CommieGIR posted:That is a lot of damned windmills. That's from their test bed in Altamont (https://en.wikipedia.org/wiki/Altamont_Pass_Wind_Farm), which was one of the first wind farms and thus a lot was build before the regulations that make you take them down when they break and so it has a bunch of really old semi-functional wind turbines. Its also where most of the pictures of "see how bad wind ruins the landscape?!?" come from. You just have to crop the freeway out of the pictures of the "ruined" landscape. They're using entirely private funding and no capital markets, so I think this plant size is the biggest they can afford and/or is sized to be most profitable as a ancillary service provider. 50 MW is still around as big as the largest non-hydro/non-CAES storage projects. The final commercialization plan probably involves partnering with big power producers who can take full advantage of arbitrage, something that's way more risky if you only own one plant. edit: here's a more recent render of their NV "plant" from this in depth article: http://www.utilitydive.com/news/first-of-its-kind-rail-energy-storage-project-targets-role-in-caiso-ancilla/417817/ 
Trabisnikof fucked around with this message at 21:26 on May 10, 2016 |
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May 10, 2016 21:22
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CommieGIR posted:That is a lot of damned windmills. You've got to be careful about trying to build too much capacity too fast.
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May 10, 2016 21:33
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CommieGIR posted:That is a lot of damned windmills. From the article, at least some of the value is going to be in smoothing production/consumption mismatches. So when some clouds bring down solar generation for a few minutes in the middle of a hot day, you release some trains rather than firing a gas plant.
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May 10, 2016 21:46
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