coil impedance

Nov 06, 2025 Last reply: 8 months ago 204 Replies

You know nothing about my "performance". But you reply as though you do.

That suggests only that you have three patents and a few published papers. It says noting about whether you can tie your shoe laces.

Is that a Word document saved as html? It's unreadable on a big screen for reasons I won't bother to explain. I didn't read any of the content because I have no interest in your ego.

Well, they have interesting electronics and pay well. And buy us lunch.

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My weekend chore is to write a proposal for another big-physics outfit, to replace an old system that digitizes a number of big pulses.

What better projects do you have going now? Something for CERN or LMJ?

The sun does us pretty well. I like it, when we do get to see it.

Edison, DeForst, Armstrong, Ford, Wrights, Townes, Gates (apologies for him), Brattain (I had lunch with him), Musk (1 degree apart). Apple, google, ICs. ASM bought EUV lithography from San Diego.

Americans invent lots of stuff. There's a reason for that.

Europe seems to be de-industrializing.

The Farnsworth Fusor did achieve fusion. Philo invented electronic television too, on Green Street near here. And discovered the multipactor effect. He was a classic American inventor, a Mormon farm boy with ideas but no credentials.

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The people at the extreme high end of the normal distribution invent things and start industries. The standard deviation is more important than the average.

For example, the Swiss have a high average IQ but don't invent much. They are too polite.

Our large number of immigrants pull down average IQ, with their limited nutrition and education and language skills. Their kids are awesome smart. And often beautiful.

We certainly need a generation of younger leaders. Vance+Kennedy would be cool.

This is a great read:

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Hatred has no rational limits.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

That's not going to happen so I will be ignoring Sloman as of now.

Maybe, but killing dangerous anymals has nothing to do with hate. Here we have a wolf problem, teletext / Ceefax / Videotext today: Meer aanvallen door wolven op vee   Het lijkt opnieuw een recordjaar te worden qua wolvenaanvallen op vee.Tot en met de eerste week van oktober zijn 741 van zulke aanvallen geregistreerd. Ter vergelijking:over heel vorig jaar werden er in Nederland 770 geteld. Dat meldt persbureau ANP op basis van gegevens van BIJ12.Die organisatie houdt voor provincies de schade bij die beschermde dieren zoals de wolf veroorzaken. Het daadwerkelijke aantal aanvallen ligt vrijwel zeker hoger.Zo zijn er nog 165 meldingen over vermoedelijke wolvenbeten,maar die zijn nog niet bij het totaal opgeteld.Boeren zijn niet verplicht om wolvenaanvallen te melden.

Translated from Dutch to English by

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attacks by wolves on livestock   It looks set to be another record year wolf attacks on livestock. Until and with the first week of October 741 such attacks have been recorded. For comparison: over the whole of last year 770 were counted in the Netherlands. This is reported by news agency ANP on the basis of data from BIJ12. That organization keeps track of the damage caused by the Protected animals such as the wolf cause. The actual number of attacks is almost certainly higher. There are still 165 reports of suspected wolf bites, but they have not yet been the total added up. Farmers are not Mandatory to report wolf attacks.

The green are against shooting wolves... Now wait till they get hungry and attacked themselves.

Some people think being named on a patent is a great thing. It usually isn't.

A lot of patents are part of a startup pump-and-dump plan, something to brag about in a pitch. Now that the US patent office is a profit center, and patents require annual payment, the patent office has no incentive to research prior art or ensure sensibility... let the lawyers fight it out.

A patent is just an invitation to waste a lot of time and money on lawyers. And on ego.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

NIF has fired shots that liberate more fusion energy than the optical input. Wall-plug efficiency is still pitiful, because the lasers aren't efficient.

Hydrogen bombs have a good ratio of energy out divided by mechanical input. Billions.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Wolves are returning to California and cattle/sheep ranchers don't like it.

In San Francisco, we have increasing numbers of coyotes, hawks, owls, wild parrots, sea lions, possum, raccoons, and even some wild turkeys now. Squirrels and rats eat our lemons and apples.

We met some people that we thought were walking their dog. It's actually a wolf that they raised from a cub.

There were a couple of street signs near here. CAUTION COYOTES and MISSING CAT.

I am conducting carefully controlled experiments to see what junk food the crows and ravens and jays prefer. Yesterday I tried a mix of cheetos and fritos on the deck. The cheetos were the absolute winner; every cheeeto disappeared before a single frito was tried.

Can you get cheetos and fritos in the olde world?

(Back to my boring proposal.)

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

\|||/ (o o) ,--oo0--------------. | Please | | Don't Feed | | The TROLL | '--------------oo0--- |__| |__| || || ooO Ooo

+----------+ | PLEASE | | DO NOT | | FEED THE | | TROLLS | +----------+ | | | | .\|.||/..

__________________ /| /| | | ||__|| | Please do | / O O\__ NOT | / \ feed the | / \ \ trolls | / _ \ \ ______________| / |\____\ \ || / | | | |\____/ || / \|_|_|/ \ __|| / / \ |____| || / | | /| | --| | | |// |____ --| * _ | |_|_|_| | \-/ *-- _--\ _ \ // | / _ \\ _ // | / * / \_ /- | - | | * ___ c_c_c_C/ \C_c_c_c____________

+-------------------+ .:\:\:/:/:. | PLEASE DO NOT | :.:\:\:/:/:.: | FEED THE TROLLS | :=.' - - '.=: | | '=(\ 9 9 /)=' | Thank you, | ( (_) ) | Management | /`-vvv-'\ +-------------------+ / \ | | @@@ / /|,,,,,|\ \ | | @@@ /_// /^\ \\_\ @x@@x@ | | |/ WW( ( ) )WW \||||/ | | \| __\,,\ /,,/__ \||/ | | | (______Y______) /\/\/\/\/\/\/\/\//\/\\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ ==================================================================
[...]

Just yesterday I visited my local farmer, less than 1 km away, and heard that two of his sheep had been killed, the carcases had been stripped to the bones. Someone said they had seen a dog in the vicinity but this amount of damage could not have been caused by a dog. Then a close neighbour reported seeing a big cat, possibly a lynx, on the farm.

Sightings like this have been reported for the last 20 years or more, they no longer make the news. Wolves hunt in packs, so their location is easy to discover and avoid; as individual animals they are frightened of humans. On the other hand, big cats (except lions) are solitary animals and will attack humans if they are surprised or feel threatened.

We lose about one hiker per year to mountain lions in California. They sneak up behind and rip one's throat open. They won't attack head-on.

Bears will attack head-on.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

You would think that.

Actually, it is derived from Sloughman, which means somebody who farms land close to a river. It is a west country name and there are more pages of Slomans in the Taunton U.K.telephone directory, than there are in the London telephone directory though London has about a hundred times the population. The other bunch of Slomans in Melbourne when I lived there had anglicised their Polish name Slominsky to Sloman, but my lot had emigrated from Bristol UK in 1850.

That's not a skill that anybody boasts about. People who wear elastic-sided boots don't exercise it.

You need spectacles but won't wear them? It reads fine on my screen. The paragraphs are double spaced which makes it look a bit sparse, but that doesn't hurt the legibility.

Microsoft Word doesn't generate great html documents - I've had to edit links with Notepad to get them to work correctly.

You are interested enough to invent your own stories about my professional career. I can understand your unwillingness to confront any aspect of the reality.

Perfectly true. But it has cost somebody upwards of $10,000 to get it there. It's not negligible.

It happens. Two of my patents came from my time at EMI Central Research, and they did try and maintain a stock of patents for patent swaps. I got the third one at Cambridge Instruments and it was more defensive - if we hadn't patented the trick somebody else might have and gone after us for royalties.

They didn't do much of a job on my "moving plate" patent.

Not always. That what my father (25 patents) and I (three patents) told a friend of mine when he was contemplating applying for one. He applied anyway, and after spending a lot of money on lawyers got $A12 million out of it. If Tektronix had persisted with their provisional patent he wouldn't have got anything.,

And Jan Panteltje sees it as his duty to propagate the most absurd of them.

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But ASML made it work.

They also buy up a lot of inventions from overseas, but make less fuss about that

Wishful thinking.

Being educated counts for as much as being clever. Being clever helps you get educated, unless you imagine that you are so clever that you can be selective about the areas of education you concentrate on, like John Larkin at Tulane.

Nothing that John Larkin knows about.

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The Swiss aren't all that numerous.

Even culture free IQ tests underestimate immigrant IQ's.

Kennedy's contribution to America's health will cool off any number of Americans. Getting fatally ill does drop you body temperature to ambient.

"How to Test Negative for Stupid: And Why Washington Never Will"

American self-belief is charming, but absurd.

Neither does Donald Trump. He doesn't do rational at all. Cunning he can manage.

A 5000-channel transient digitizer system. It's not technically very interesting so I'll bid real high and hope we don't get it.

We have a canyon nearby with lots of critters for the coyotes and raptors to eat. The shapes of the hills make a nice updraft roughly parallel to Sussex Street so we have beautiful soaring birds criss-crossing and hardly flapping their wings.

The crows and ravens zoom by my bedroom deck, hoping that I've put out treats. In nesting season, the scrub jays will eat out of my hand. The crows won't.

One one-legged jay "Gimpy" would perch on my finger to snack. He's gone now; I think they don't live long.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Cymer made it work at the 10-watt level. ASML applied money to scale it up.

The tin droplet thing is expensive and messy. Some alternates are still being worked on, like electron wiggler lasers and rubber stamps.

Maybe 5 nm is as good as we need or will ever get.

Google europe deindustrialization

The idea of going green and having a services economy, not making stuff, will collide with AI and with moving services to India and China.

Tulane was free and was great fun. I knew what I wanted to learn and did it. I feel sorry for the kids that go into enginering school cold.

English, philosophy, chemistry were forgettable.

Some of the 101-level courses were good, like economics and psychology. The more advanced versions were nonsense.

Some "sciences" are like that.

I spent a little time there. I thougt the people were mature, nice, and stiff.

He's brilliant and funny. Those virtues go together.

He lives in some little town north of Lake Pontchartrain, where we use to go in the summer.

The USA works pretty well. I think its long-term prospects are good.

It's a good place to design electronics.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Was that the Leichenhalle?

It gets me ballpark numbers on inductances and resistances and makes me sure that I really understand how a Rogowski coil works. So I can Spice the system and train my instincts.

There are a zillion academic papers with giant equations, and lots of data sheets, but almost no actual numbers about Rs and Ls.

That's too common: lots of theory and no typical numbers.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

No. The ISS and boots on the moon are worse.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

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