On Friday, October 1, 2021 at 7:47:10 PM UTC-4, John Larkin wrote:> > Mo is a speech pathologist. She has worked with old guys who couldn't > talk but could still communicate in morse code. > > I could never learn it myself, so I never got a ham license. > > > >http://www.arrl.org/files/file/Technology/tis/info/pdf/78518.pdf > > > >Now, Mars bounce, that would be ... but we'd first have to re-start the > >Rancho Seco nuclear plant and then hold a major fund drive for the > >expected electricity bills. > This was the first moonbounce: > > https://www.dropbox.com/s/67foxzuqp8pnx6b/MoonBounce.JPG?dl=0 > > I think marsbounce has been done. > --I was only interested in microwave, so I never got a license. Instead, I went into Cable TV and Broadcast to work with microwaves. Cable uses CARS to link two areas together, like to cross a lake or river. TV uses them for STL.
Horrible lead times on some MOSFETs
Started by ●September 28, 2021
Reply by ●October 4, 20212021-10-04
Reply by ●October 4, 20212021-10-04
On Saturday, October 2, 2021 at 2:41:30 AM UTC-4, Jan Panteltje wrote:> On a sunny day (Fri, 1 Oct 2021 12:44:28 -0700) it happened Joerg > <ne...@analogconsultants.com> wrote in <irp6os...@mid.individual.net>: > >Now, Mars bounce, that would be ... but we'd first have to re-start the > >Rancho Seco nuclear plant and then hold a major fund drive for the > >expected electricity bills. > Joerg how about controlling that mars helicopter? > I think a replay attack may work :-) > China you have not seen this posting..The thing couldn't get off the ground for the last test. The atmosphere is too thin at this time.
Reply by ●October 4, 20212021-10-04
On a sunny day (Mon, 4 Oct 2021 10:10:14 -0700 (PDT)) it happened Michael Terrell <terrell.michael.a@gmail.com> wrote in <cde1387a-4d56-4910-b93e-babd2bc09f85n@googlegroups.com>:>On Friday, October 1, 2021 at 7:47:10 PM UTC-4, John Larkin wrote: >> >> Mo is a speech pathologist. She has worked with old guys who couldn't >> talk but could still communicate in morse code. >> >> I could never learn it myself, so I never got a ham license. >> > >> >http://www.arrl.org/files/file/Technology/tis/info/pdf/78518.pdf >> > >> >Now, Mars bounce, that would be ... but we'd first have to re-start the >> >Rancho Seco nuclear plant and then hold a major fund drive for the >> >expected electricity bills. >> This was the first moonbounce: >> >> https://www.dropbox.com/s/67foxzuqp8pnx6b/MoonBounce.JPG?dl=0 >> >> I think marsbounce has been done. >> -- >I was only interested in microwave, so I never got a license. Instead, I went into Cable TV and Broadcast to work with >microwaves. Cable uses CARS to link two areas together, like to cross a lake or river. TV uses them for STL.I have a full license, and also a maritime communication operator certificate. But no morse, do not see the point, was no longer needed, but s.o.s is ...---... :-)
Reply by ●October 4, 20212021-10-04
On a sunny day (Mon, 4 Oct 2021 10:12:33 -0700 (PDT)) it happened Michael Terrell <terrell.michael.a@gmail.com> wrote in <7ef6f447-81ae-4072-bb2c-01f5e0228e10n@googlegroups.com>:>On Saturday, October 2, 2021 at 2:41:30 AM UTC-4, Jan Panteltje wrote: >> On a sunny day (Fri, 1 Oct 2021 12:44:28 -0700) it happened Joerg >> <ne...@analogconsultants.com> wrote in <irp6os...@mid.individual.net>: >> >Now, Mars bounce, that would be ... but we'd first have to re-start the >> >Rancho Seco nuclear plant and then hold a major fund drive for the >> >expected electricity bills. >> Joerg how about controlling that mars helicopter? >> I think a replay attack may work :-) >> China you have not seen this posting..>The thing couldn't get off the ground for the last test. The atmosphere is too thin at this time.Yes servos started oscillating I've read.. Control loop needs to be adapted perhaps.
Reply by ●October 4, 20212021-10-04
On Monday, October 4, 2021 at 9:51:54 AM UTC-7, Joerg wrote:> On 10/1/21 4:46 PM, John Larkin wrote:> > This was the first moonbounce: > > > > https://www.dropbox.com/s/67foxzuqp8pnx6b/MoonBounce.JPG?dl=0 > > > > I think marsbounce has been done.> If your antenna is big enough almost anything becomes possible.There's interesting possibilities for small enough antennas, too. If one parked a few corner-cube reflectors in orbit, you could link to a nearby but over-the-horizon station by simply retroreflecting off the satellite with a small dish (and the diffraction limit of the satellite would guarantee that another node a few miles away would make a good connection). Echo was a lovely sight in the night sky, once. <https://en.wikipedia.org/wiki/Project_Echo>
Reply by ●October 4, 20212021-10-04
On 10/2/21 7:11 AM, jlarkin@highlandsniptechnology.com wrote:> On Tue, 28 Sep 2021 14:40:09 -0400, bitrex <user@example.net> wrote: > >> Ouch: >> >> <https://www.mouser.com/Semiconductors/Discrete-Semiconductors/Transistors/MOSFET/_/N-ax1sf?P=1yzvta6Z1yrzahtZ1yw78i4&Ns=Pricing%7c0> >> >> A lot of the inexpensive low Vgs high-voltage MOSFETs are like that, >> even singles :( > > I just designed a gadget with an 8.7 volt SMB zener, in an emergency > clamp circuit. But nobody has any. Looks like we can nab a reel of > SOD123 parts, and push the power dissipation a tad. Lots of copper on > the ends. >Aren't these good enough? :-) https://www.digikey.com/en/products/detail/micro-commercial-co/SMBJ5345B-TP/1636167 -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●October 6, 20212021-10-06
On Monday, October 4, 2021 at 1:34:40 PM UTC-4, Jan Panteltje wrote:> On a sunny day (Mon, 4 Oct 2021 10:12:33 -0700 (PDT)) it happened Michael > Terrell <terrell....@gmail.com> wrote in > <7ef6f447-81ae-4072...@googlegroups.com>: > >On Saturday, October 2, 2021 at 2:41:30 AM UTC-4, Jan Panteltje wrote: > >> On a sunny day (Fri, 1 Oct 2021 12:44:28 -0700) it happened Joerg > >> <ne...@analogconsultants.com> wrote in <irp6os...@mid.individual.net>: > >> >Now, Mars bounce, that would be ... but we'd first have to re-start the > >> >Rancho Seco nuclear plant and then hold a major fund drive for the > >> >expected electricity bills. > >> Joerg how about controlling that mars helicopter? > >> I think a replay attack may work :-) > >> China you have not seen this posting.. > > >The thing couldn't get off the ground for the last test. The atmosphere is too thin at this time. > Yes servos started oscillating I've read.. > Control loop needs to be adapted perhaps.The thin atmosphere changes pressure, depending on the time of year. It is to thin for the current atmospheric conditions to archive lift at the rotor speed that's available. It has well exceed its design specification of five flights. There has been ongoing coverage of this on a Veteran and Military support website, since the first flight. I would link the site, but the trolls on here would try to disrupt it. They would quickly be booted, but why let them even know about it? There are plenty of videos about it on Youtube, derived from NASA's public data.
Reply by ●October 6, 20212021-10-06
On 29/09/2021 21:10, John Larkin wrote:> > Shortage, real or not. > > Panic. > > Multiple over-buying. > > Ramp up production. > > Glut. Garages full of toilet paper. > > The semi industry does this pattern now and then.There's a very fine line between JIT and TFL. JIT doesn't cope well with fluctuations in demand, whatever the cause. I have enough petrol for about 20 miles, according to the car. I don't know how accurate that is, I've never pushed it (!) that far before. -- Cheers Clive
Reply by ●October 6, 20212021-10-06
On a sunny day (Wed, 6 Oct 2021 00:14:56 -0700 (PDT)) it happened Michael Terrell <terrell.michael.a@gmail.com> wrote in <ed914183-acbc-46b7-8a99-49ad82f74fcan@googlegroups.com>:>On Monday, October 4, 2021 at 1:34:40 PM UTC-4, Jan Panteltje wrote: >> On a sunny day (Mon, 4 Oct 2021 10:12:33 -0700 (PDT)) it happened Michael >> Terrell <terrell....@gmail.com> wrote in >> <7ef6f447-81ae-4072...@googlegroups.com>: >> >On Saturday, October 2, 2021 at 2:41:30 AM UTC-4, Jan Panteltje wrote: >> >> On a sunny day (Fri, 1 Oct 2021 12:44:28 -0700) it happened Joerg >> >> <ne...@analogconsultants.com> wrote in <irp6os...@mid.individual.net>: >> >> >Now, Mars bounce, that would be ... but we'd first have to re-start the >> >> >Rancho Seco nuclear plant and then hold a major fund drive for the >> >> >expected electricity bills. >> >> Joerg how about controlling that mars helicopter? >> >> I think a replay attack may work :-) >> >> China you have not seen this posting.. >> >> >The thing couldn't get off the ground for the last test. The atmosphere is too thin at this time. >> Yes servos started oscillating I've read.. >> Control loop needs to be adapted perhaps. > >The thin atmosphere changes pressure, depending on the time of year. It is to thin for the current atmospheric conditions to >archive lift at the rotor speed that's available. It has well exceed its design specification of five flights. >There has been ongoing coverage of this on a Veteran and Military support website, since the first flight. I would link the >site, but the trolls on here would try to disrupt it. They would quickly be booted, but why let them even know about it? >There are plenty of videos about it on Youtube, derived from NASA's public data.Yes the thin air issue is true. But they just did speedup rotor speed https://www.space.com/mars-helicopter-ingenuity-flight-14-abort From that link: Analysis of the Sept. 18 preflight test has shown that two of Ingenuity's servos oscillated slightly during the "servo wiggle" checkout. The team is still trying to determine the cause, but it may be due to increasing wear More here: https://www.space.com/mars-flying-harder-ingenuity-helicopter-14th-flight
Reply by ●October 7, 20212021-10-07
On Wednesday, October 6, 2021 at 6:43:18 AM UTC-4, Jan Panteltje wrote:> On a sunny day (Wed, 6 Oct 2021 00:14:56 -0700 (PDT)) it happened Michael > Terrell <terrell....@gmail.com> wrote in > <ed914183-acbc-46b7...@googlegroups.com>: > >On Monday, October 4, 2021 at 1:34:40 PM UTC-4, Jan Panteltje wrote: > >> On a sunny day (Mon, 4 Oct 2021 10:12:33 -0700 (PDT)) it happened Michael > >> Terrell <terrell....@gmail.com> wrote in > >> <7ef6f447-81ae-4072...@googlegroups.com>: > >> >On Saturday, October 2, 2021 at 2:41:30 AM UTC-4, Jan Panteltje wrote: > >> >> On a sunny day (Fri, 1 Oct 2021 12:44:28 -0700) it happened Joerg > >> >> <ne...@analogconsultants.com> wrote in <irp6os...@mid.individual.net>: > >> >> >Now, Mars bounce, that would be ... but we'd first have to re-start the > >> >> >Rancho Seco nuclear plant and then hold a major fund drive for the > >> >> >expected electricity bills. > >> >> Joerg how about controlling that mars helicopter? > >> >> I think a replay attack may work :-) > >> >> China you have not seen this posting.. > >> > >> >The thing couldn't get off the ground for the last test. The atmosphere is too thin at this time. > >> Yes servos started oscillating I've read.. > >> Control loop needs to be adapted perhaps. > > > >The thin atmosphere changes pressure, depending on the time of year. It is to thin for the current atmospheric conditions to > >archive lift at the rotor speed that's available. It has well exceed its design specification of five flights. > >There has been ongoing coverage of this on a Veteran and Military support website, since the first flight. I would link the > >site, but the trolls on here would try to disrupt it. They would quickly be booted, but why let them even know about it? > >There are plenty of videos about it on Youtube, derived from NASA's public data. > Yes the thin air issue is true. > But they just did speedup rotor speed > https://www.space.com/mars-helicopter-ingenuity-flight-14-abort > From that link: > Analysis of the Sept. 18 preflight test has shown that two of Ingenuity's servos oscillated slightly during the "servo wiggle" checkout. > The team is still trying to determine the cause, but it may be due to increasing wear > > More here: > https://www.space.com/mars-flying-harder-ingenuity-helicopter-14th-flightI would think the thin air would make it worse, because it can't damp the variations with so little load on the blades.
