Recent content by DaveE

But, why would they? "Can't" and "hasn't been observed" are two different things. Animals in the wild tend not to do circus tricks, they drink the easiest way. BTW, my dog will sometimes drink water from a bowl in the back seat of my car by lying down, putting her front feet out on the sides...

Only in simple conductors with constant resistivity. Which is soooo far away from blue light as to be irrelevant. Don't confuse what you read in an EM textbook with chemistry. Metals are special because of the (relatively) free conduction band electrons; that's not like sea water. The term...

It will never balance perfectly, but it doesn't need to. As others said, things tend to average out. If they don't, in a significant way, the utility can shift things around to compensate. Users with big loads tend to want to draw balanced currents anyway, and many users with smaller loads will...

Sorry, your probably not going to get a design from us, certainly not me. I would suggest more study/research/reading and less repeatedly asking general questions about noise and amplifiers. Trust me you have more to learn about this before you can build the highest performance circuits. There...

LT1115 SSM2019 AD8429 JFE150 EL2125

The short answer about polarities is that they ALL have to be defined in schematics and such. Then given those definitions you write equations that reflect how the real world works. Yes, you can define things so that power is negative. It's a real thing, for example, in electrical distribution...

Sorry, I misunderstood your reply, I think. I'll undo it. "the same reply"... Not exactly.

Excellent, thank you! The battery will cause current to flow through the resistors. Each resistor will have a voltage drop across it according to Ohm's law. Kirchhoff's voltage law says that the voltages around any loop must sum to zero. Your voltmeter isn't measuring just the battery voltage...

The ground symbol in schematics is an arbitrary name for a circuit node. If there is only one drawn then it is meaningless.

IDK, why isn't it 137V? 4V? -17V? How would we know? Schematic please, with component values. You can just draw it on paper, take a (readable) photo and post it. Seriously, reread your question and consider if it's understandable. We are not clairvoyant. 'They' say there's no bad questions...

Yes. When the news media gets captivated by the next big story... SQUIRREL!!!... Something about Taylor Swift or a migrant invasion, IDK. Stories about 787 manufacturing issues have been around for several years. Stories about wheels and engine cowls falling off have little do do with Boeing...

Yes, but you have more of them, so it's not the same amount of copper.

Umm.. What? Are you trolling us? Wouldn't that depend on how close you are to the transmitter, how powerful the transmitter is, etc. ? There's lots of stuff on the web about low noise analog design, maybe you should study some of that stuff. I'm not really motivated to search for and read data...

Somewhere in my workshop I've got these: HP465A, circa 1965, with 25uV over 1MHz BW (RTI), for white noise, that's equivalent to 25nV/√Hz. HP461A, circa 1963, with 40uV over 150MHz BW (RTI), equivalent to 3.3nV/√Hz. These aren't heroic circuits, just good lab preamps. Granted, they aren't...

Here's stuff you could improve on, buy one of these and take it apart. Or, maybe you haven't fully described what you want. https://www.google.com/search?q=portable+propane+electric+generator&rlz=1C1UEAD_enUS1084US1084&sourceid=chrome&ie=UTF-8