Re: [Vo]:[EE] Wireless power transmission
https://en.wikipedia.org/wiki/Wireless_power_transfer On Mon, Aug 10, 2020 at 12:22 AM William Beaty wrote: > On Sat, 8 Aug 2020, bobcook39...@hotmail.com wrote: > > > I agree its not clear what I meant.. I was intending to note that the > form > > of the energy being transmitted was avoided in the presentation. > > HA! They can't say "megawatts of RADIATION. It's jsut microwaves, > broadcast at exactly the same frequency as your kitchen soup-nuker box." > The natives would come after them with pitchforks (torches only needed if > at night.) > > But it's OK! Since its non-ionizing radiation! And, it's not on land, and > only sent above water. So it cooks migratory waterfowl. And cooks > pleasure boats who aren't aware of what that long mysterious row of > floating "danger buoys" actually means. > > ( ( ( ((O)) ) ) ) > William J. Beaty https://electricatechnology.com > beat...@gmail.comCTO, Inventor, Research Engineer > bi...@amasci.com > 206-762-3818 vm5459 Wilkinson Rd, Langley, WA 98260-8700 >
RE: [Vo]:[EE] Wireless power transmission
On Sat, 8 Aug 2020, bobcook39...@hotmail.com wrote: I agree its not clear what I meant.. I was intending to note that the form of the energy being transmitted was avoided in the presentation. HA! They can't say "megawatts of RADIATION. It's jsut microwaves, broadcast at exactly the same frequency as your kitchen soup-nuker box." The natives would come after them with pitchforks (torches only needed if at night.) But it's OK! Since its non-ionizing radiation! And, it's not on land, and only sent above water. So it cooks migratory waterfowl. And cooks pleasure boats who aren't aware of what that long mysterious row of floating "danger buoys" actually means. ( ( ( ((O)) ) ) ) William J. Beaty https://electricatechnology.com beat...@gmail.comCTO, Inventor, Research Engineer bi...@amasci.com 206-762-3818 vm5459 Wilkinson Rd, Langley, WA 98260-8700
[Vo]:Offshort Wind cables Re: [Vo] Wireless power transmission
On Wed, 5 Aug 2020, Terry Blanton wrote: > Similar methods have been proposed to send power to earth from orbiting solar cell arrays, and probably just as impractical. https://www.thedrive.com/the-war-zone/9/x-37b-space-planes-microwave-po wer-beam-experiment-is-a-way-bigger-deal-than-it-seems Look at their EMROD "our technology," it's almost certainly just 2.5GHz unlicenced industrial microwave, same as uWave ovens, and not at all "tight" unless we have dipole arrays tens of meters wide. Which is probably what they propose (didn't read the whole thing.) They'll need little repeaters on floating boats. Some modern microwave ovens use kilowatt FET oscillators. I've had one apart on my bench (well, it was an argon-capsule plasma lamp, but used power pcb modules from a commercial microwave oven.) The goal: for offshore wind turbines, the underwater cables cost roughly $1000USD per foot. There's BIG money in any wireless replacements for submerged megawatt power cables: wireless beams on a scale of tens of kilometers. ( ( ( ((O)) ) ) ) William J. Beaty https://electricatechnology.com beat...@gmail.comCTO, Inventor, Research Engineer bi...@amasci.com 206-762-3818 vm5459 Wilkinson Rd, Langley, WA 98260-8700
Re: [Vo]:Useful information on masks
On Sun., Aug. 9, 2020, 8:29 p.m. Jed Rothwell, wrote: > H LV wrote: > > >> When you think about it, I don`t think masks have ever been designed >> explicitly to keep stuff in. >> As far as I know masks have traditionally been designed to keep stuff >> out. Keeping stuff in is a new concept. >> > > I believe you are wrong about that. Surgical masks are worn to protect the > patients as much as the doctors. > That is true. I realised that after I sent the message. In a way we are all surgeons now. > >
Re: [Vo]:Useful information on masks
H LV wrote: > When you think about it, I don`t think masks have ever been designed > explicitly to keep stuff in. > As far as I know masks have traditionally been designed to keep stuff out. > Keeping stuff in is a new concept. > I believe you are wrong about that. Surgical masks are worn to protect the patients as much as the doctors.
Re: [Vo]:Useful information on masks
When you think about it, I don`t think masks have ever been designed explicitly to keep stuff in. As far as I know masks have traditionally been designed to keep stuff out. Keeping stuff in is a new concept. Harry On Sun, Aug 9, 2020 at 5:29 PM Jed Rothwell wrote: > This is off-topic, but important. > > It turns out that cheap, throw-away "surgical mask, 3-layer" type masks > work best. These are the ones you can buy anywhere nowadays. Office Depot > sells them cheap. > > See this research article in Science: > > https://advances.sciencemag.org/content/early/2020/08/07/sciadv.abd3083 > > Knitted and bandana types are not recommended. > >> >
[Vo]:Useful information on masks
This is off-topic, but important. It turns out that cheap, throw-away "surgical mask, 3-layer" type masks work best. These are the ones you can buy anywhere nowadays. Office Depot sells them cheap. See this research article in Science: https://advances.sciencemag.org/content/early/2020/08/07/sciadv.abd3083 Knitted and bandana types are not recommended. >
