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The city, seen briefly at 22:25, Portland Oregon, Broadway street, as it was in the 1950s.

Best education on transmission line theory on the planet. This video can teach you more in minutes than months of hap-hazard classes in EE college

The Morgan Freeman of the 1950s

Vintage, timeless, awesome!

Magnificent

Old, but gold

Fantastic!

At 14:18 can someone tell me why those two waves on scope screen do not combine?

This video not only opened my eyes, it also open my skull, erased what i thought i knew about transmission lines and put back what i should know about transmission lines. Thanks for sharing it.

it is stupid that this video is more clear up to me than google search on 2023 and my elec engineering course.

thanks for sharing

nothing less than pure gold

The current (electrons) are not moving lightning fast, the field (volt) is

If i binge watched these videos 20 years ago in college, things would have been different 😅❤❤❤ magnificent..

very good explanation...

All wires are transmission lines.

Guy sounds a bit like Spock.

Is this a transmission line? Is that a transmission line? Am I a transmission line? Are you a transmission line?

Amazing! i watched this with plesure

Ok. With a title like that I thought it was gonna be an electro-industrial track.

Now I finally understand transmission lines, characteristic impedance, and reflections. Now to apply this knowledge in the real world to RF and in helping better understand antenna theory. Though I still wonder why impedance matching and reflections aren't an issue at low frequency, with electrically short conductors (transmission lines). Particularly in the Audio world where power amp output impedance is ideally 0 Ohms, going into a load of a few to a few hundred Ohms. Oh, is it that the characteristic impedance of a transmission line is high enough to be negligible at low frequencies?

this is the best video I have ever seen about impedance matching, thank you !

After watching this kind of videos you're left with a profound sensation of awe and satisfaction about the vibe and delivery of this kind of content, now old style videos. Glad some of them are preserved in time in here...

We used tectonic oscilloscopes, when I was employed by Western Electric AT&T. It was to me, like a mechanic is to a wrench, or to a hammer is to a carpenter. In my opinion they made the best oscilloscopes available at that time.

These old videos explain principles and examples so much better than modern videos! 👍🍻

I'd have never guessed that Ronald Reagan knew so much about transmission line theory. Must have been between Hollywood gigs. ;)

These classics are able to explain stuff clearly. This other classic also explain reflection very clearly too, just for sharing: th-cam.com/video/DovunOxlY1k/w-d-xo.html

Best explanation of transmission lines I ever saw. Simple, clear, concise, complete, tranquil, structured. Leads by example.

This is the first time I have understood impedance, reflection and velocity factor. Thank you for sharing this.

For a short circuit, the return signal was said to be reflected. But aren't the short circuit's 2 emitted pulses each just transmitting through the short circuit to cross to and return in the opposite line, which explains the short circuit return signal's opposite polarity?

Lernen unter optimalen, ist gleich beruhigenden Bedingungen. Sprecher, Musik, Geschwindigkei, perfekt.

Ohhhhhhhhhhhhhhhhhhhhh.... so that's what termination is. This video makes things so much clearer.

I was watching this at 2× speed, kind of bored until about the six minute mark... and then I sat up and said, _whoa!_ I had to rewind because I'd never learned what characteristic impedance actually was. I knew the effect of an impedance mismatch was that the signal bounced, but I didn't get _why_ it did. In rapid succession there were three key things this video taught me about high frequency signals: 1. The insulator between conductors, even if it is air, is the "dielectric" of a capacitor. 2. Every wire, even an ideal one with zero resistance, has inductance. 3. To make it easier to conceptualize, it's okay to chop up the line into multiple segments of repeating inductors and capacitors that pass the signal one to the next. Also helpful was the reminder that the characteristic impedance Z = sqrt(L/C). Increasing the length of the cable increases L at the same rate it increases C, so it cancels out when calculating Z. Therefore, 4. Theoretically, a cable will have the same characteristic impedance no matter how long it is.

Wish I had this video when I was in engineering school "a million" years ago.

wait...its all transmission line?!

If you're still having trouble, AT&T Archive has an even better video; Similarities of Wave Behavior by Dr. John Shive. Definitely worth a look.

This is such a well made lecture !

Timeless

Great video ! TNX 4 the upload !

University programs are mostly overpriced trash. More often then not someone has to get over a language barrier before they can start to understand and integrate the basics. I love these videos.

*Beautiful.*

Certainly this explanation of reflected waves from transmission lines is the best I have seen.

Thanks for sharing this video.

That was an awesome video!

Thank you very much for sharing this gem.

Wow - how good was that eh? Brilliant. So well explained. Thank you for uploading it and making it available for us to learn from.

great video. seeing is believing.

They don't teach like this anymore

And here I thought I got recommended a sick techno track. Bamboozled again!

A fantastic lesson, a masterpiece of explanation.