Rockbadchild
Veteran Member
has anyone seen Nikola Tesla one way valve ? if that’s not genius I don’t know what is
Tell us something we don’t know.
- Thread starter dodge man
- Start date
Without seriously derailing the thread, I'll just note that this device breaks one of the fundamental rules of 2-port passive isotropic networks (reciprocity / diagonal scattering matrix), so I got curious and did a little digging. It appears this can be made to work, but at a ratio of only 2:1 in flow velocity (fwd:rev), not Tesla's claimed 200:1 theoretical. Although I wonder if the person who "proved" that really considered fluids of different viscosities, or even pressure-sensitive fluids.
Still cool, either way. I'm actually going to make some time to play with this idea, next time I have a break between projects, I can think of one potential use for it in my line of work.
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BnRidge
Gold Member
Up to 200v DC was needed on early telegraph systems to transmit the signal long distances.
MossRoad
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Yikes!...he was a total scum bag. But, you can't knock his work ethic!
...
2LaneCruzer
Super Star Member
The first Boy Scout troop in the United States was started in Pawhuska, Oklahoma, in 1909.
www.onlyinyourstate.com
11 Things You Didn't Know About The History Of Oklahoma
It's time to brush up on your Oklahoma history!
www.onlyinyourstate.com
BnRidge
Gold Member
The first Boy Scout troop in the United States was started in Pawhuska, Oklahoma, in 1909.
11 Things You Didn't Know About The History Of Oklahoma
It's time to brush up on your Oklahoma history!
What was the first Scout troop in the United States? Here's the answer
Which Boy Scouts of America troop was the first in existence? That's a surprisingly difficult question to answer, but here's what we know.
blog.scoutingmagazine.org
Grumpycat
Elite Member
This is how suppressors (aka "silencers") work on firearms.
Wow, they grew quick. My great-grandfather and grandfather were big into Scouts in the 1920's, as Scout master and child, respectively. I had always assumed my great-grandfather grew up in Scouts, but I guess not if they weren't started until 1909, as he'd have been aged out before then.The first Boy Scout troop in the United States was started in Pawhuska, Oklahoma, in 1909.
11 Things You Didn't Know About The History Of Oklahoma
It's time to brush up on your Oklahoma history!
Interesting. I didn't know that, but it seems to make sense.
Side note, I did take an hour to build a structure and simulate it last night, stripline construction DC to 20 GHz. I'm sad to say the Gods of Physics held true, you cannot have a 2-port passive isotropic network that is not reciprocal, meaning insertion loss forward must be same as reverse. So, at least for this application, it's not useful.
That said, insertion of a ferrite or any anisotropic material would make it work just fine. Unfortunately, just like the guys who decided a simple check valve is way simpler, cheaper, smaller, and less lossy, all the same holds for a circulator type isolator over this, in radio and microwave frequency applications.