1943 U.S. NAVY WWII ERA RADIO TECHNICIAN TRAINING FILM - CAPACITANCE OHMS LAW 47514

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Produced by Burton Holmes Films during WWII, this black & white educational film is about Capacitance, the ability of a system to store an electric charge. It was made to educate U.S. Navy Radio Technicians and was probably standard viewing during training. Typical of government films made during the WWII timeframe, this film is outstanding in its use of both live action and animated sequences. Copyright is 1943.
Opening titles: United States Navy Training Film - Capacitance (:06-:32). Two uniformed men play pool. A narrator explains the flow of current. Animation shows a current flow. Resistor is explained. A pool table. Ball is hit by a pool cue. Pool balls on the table. I = E/R (:33-2:15). A resistor and a circuit are explained. Movement of electrons shown with animation between A and B. A is negative and B is positive (2:16-4:04). More energy being stored with larger plates is shown via animation. A man uses a capacitor. A hand unscrews a cap holding air in a tire. Air tank gauges. When valve is opened, air rushes out (4:05-6:01). A man connects a power supply and charges a condenser. Voltage is increased. Q is quantity of electricity stored. Plate spacing. The plate area (6:02-8:09). The dielectric is an insulating material or a very poor conductor of electric current. When dielectrics are placed in an electric field, practically no current flows in them because, unlike metals, they have no loosely bound, or free, electrons that may drift through the material. Glass is used as a dielectric. Two or more condensers are used (8:10-9:40). Voltage source increases. A man performs a test with wires and condensers. Large condenser equals a larger spark. A screwdriver captures the spark. Title: end of part one (9:41-10:55).
Title: Capacitance - Part two. A circuit with a battery and a condenser is shown. I = 6 volts divided by 1 ohm or I = 6 amps (10:56-11:57). I = 1.5 volts divided 1 ohm. Different current flowing opposing the battery voltage (11:58-13:24). Charge across the condenser builds up in a graph shown and explained. Farads, ohms explained. A graph shows a charge falling. T = RC, The RC time constant, also called tau, the time constant of an RC circuit, is equal to the product of the circuit resistance and the circuit capacitance. R - C Time Constant resistance machine (13:25-16:14). The machine is explained and gauges are shown. A man points out parts on the machine. An oscilloscope is a device for viewing oscillations, as of electrical voltage or current, by a display on the screen of a cathode ray tube (16:15-18:10). Oscilloscope's screen, spot on the screen produces same curve as that on a graph. Man uses a marker on the screen (18:11-19:44). Close on the oscilloscope's screen. One condenser is disconnected. Watch the meter. Resistance is cut in half. Resistance and capacity. Oscilloscope screen shows curve. Resistance regulates flow (19:45-21:55). Title: Capacity with Alternating Current. Condenser is reversed in animation. Alternating current is explained and shown via animation (21:56-23:21). The narrator amplifies his voice, he shows a microphone amplifier. Diagram of amplifier circuit at work. The narrator speaks to the viewer (23:22-25:28). End credits (25:29-25:38).
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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit www.PeriscopeFilm.com

[@jonsey3645]

The fact that naval training material sometimes 80 years old are still referenced constantly and that you can teach yourself anything that happens on a vessel from no prior knowledge to workable familiarity using naval training books is the greatest compliment that I can imagine. An almost sacred ideology embraced by the Naval Technical Training Command from before WWII was adopted. The simple, straightforward approach to teaching people from a wide variety of backgrounds, many with no prior formal training, who must become functional as soon as possible are the realities of war and the Navy is simply the best at compiling these manuals. God Bless the Navy and the NTTC.

[@michaelbauers8800]

I learn a lot from these videos

[@liberalsockpuppet4772]

I'm a physics teacher and a WWII buff. I'm loving this!

[@PeriscopeFilm]

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[@topgun4229]

i am an old tv-radio tecnicien, all those old films remind me when i was younger ! when radio was radio !

[@somethingsomeone5440]

I love these old films. I always learn more about subjects I thought I already understood fairly well

[@irinabonney1721]

Now my electrician showing up with a pool cue makes a lot more sense.

[@robertbruce7686]

Yay hahaha

[@graxjpg]

What about when the milkman (or tv repairman) shows up with a box of chocolates? Should I be concerned?

[@jayboyusa7380]

@@graxjpg no worries about chocolate. Only worries when he shows up with condoms!

[@mepacrina9291]

How good and clear educational films were in the past! (not to mention the papers , HP journal, Tekscope, app notes ,etc) Now is hard to find a complete detailed datasheet .

[@Les537]

Information was delivered much cleaner before all the experts screwed everything up. Go Navy!

[@clikerzbot]

Always love these vintage films..simple and clear compared for todays so called experts. Cheers to my american friends from the philippines.

[@glpilpi6209]

Over the past two decades far too much complication has been introduced . Basic principles can be clearly demonstrated , this is how electronic principles were taught to me over forty five years ago at college on day release in the UK.

[@yz8302]

This film is more better than the modern course, easier to understand.

[@JamesGMunn]

OK, up the voltage to 800 Volts then use both hands to hold the uninsulated clips to charge the capacitor. Those who die during this activity will immediately fail the course!

[@raybin6873]

Your funeral home business must be slow? 😆

[@Madness832]

I was like, "WTF?"

[@billruss6704]

Or as my electronics teacher would say the most dangerous thing is not the shock but the elbow of the guy next to you that is getting shocked.

[@lwilton]

I gotta say I was wondering just a bit if that voltage was being exaggerated by a few orders of magnitude. But on looking closely, he was holding the insulators on those alligator clips. Personally I'd prefer more than an eighth of an inch between me and 800 volts at an amp or two. On the other hand, putting a screwdriver across a 5 mike condenser at 800V should have left him with about half a screwdriver rather than a pretty spark.

[@pleindespoir]

As soldiers are doomed to die, there wasn't much obout on-the-job-safety ;)

[@nagaselin8710]

Animation and its detail are far more easy to understand than college EE course.No wonder piles of scholars are veterans from every branch of military,they learned the basics theory and then studied details of technology ,such as modulation.

[@toastnjam7384]

The military has always been great at teaching trades.

[@alext8828]

It should be more widespread. Use it in high school instead of Chaucer.

[@alext8828]

@denny rane Yes, it's a shame they don't teach like that in civilian life.

[@straightpipediesel]

You have to remember the students were far more motivated. If you fail the radio repair course, your next MOS may very well be infantry.

[@alext8828]

@@straightpipediesel True, but just watching them, they're so easy to understand.

[@tempestvideos9834]

This reminds me of physics 2. I loved the electronics and electromagnetism part.

[@jamesslick4790]

Cool video, hope to see more basic electronics. These old films, based on discrete components really explain the details! Love 'em! 👍😊👍

[@deaustin4018]

well, I was army, but I gotta admit those navy types are pretty intelerg -entirll - pretty smart.

[@justanotherdrunk]

takes me right back to junior high electronics class thanks

[@marc-andrebrunet5386]

🎯Exactly what I think🤝

[@seanwatts8342]

When did you go to junior high? 1951?

[@wrenchg3954]

You got that right. It's also why all of these training videos are still used to this very day. Many Union and trade schools use them. Well like they say, if it ain't broke, don't fix it.

[@nigelclark7360]

Very good lecture and excellent coverage on capacitors , the good old days .

[@ralphh.2200]

These basic courses used a pool table to teach 19 yr old kids straight out of Great Lakes...Navy got it back in those days...

[@ericfermin8347]

The only thing missing is strippers.

[@AlanCanon2222]

My grandfather taught some of them at Murray State in Kentucky, they were called 90 Day Wonders.

[@wbeaty]

It's actually correct! Many of these training films get it wrong, showing nonsensical physics, and teaching misconceptions. THIS ONE DOESN'T! It shows that... electricity flows *slowly* in circuits, electricity passes *through* capacitors, and electricity always flows in complete circles (where electricity cannot be a form of energy.) A "charged" capacitor contains the same amount of electrons as an "uncharged" capacitor, since capacitors store energy, not charge. They even show the random thermal vibration of electrons in metals! These guys must actually know some physics! That's rare. Only one slight mistake, mostly present in Part 2... they constantly speak as if "current" was a substance, as if it could flow from place to place. No, the only flowing substance here is called "charge." If they deleted the word "current" and instead said "charge-flow" and "flow of charge," then their language would be far more correct and consistent. "Current" doesn't flow in wires. Hydraulic analog: when describing pipes and hoses, we speak of flowing water, not "flowing current." There is no magical substance called "current" which flows in pipes, WATER flows in pipes. When we turn on a faucet, "current" doesn't fill our bucket, instead it's filled with WATER. The same is true with electricity. In electrical explanations, we'd correctly discuss charge, charge-flows, or perhaps Quantities of Electricity, and the flows of "electricity" called electric currents. Traditionally, in physics the word "electricity" means charge. (The flows of electricity are called currents, and an amount electricity is measured in coulombs, where electricity is not some sort of flow-rate!) The producer screws with the audience, where in part two, suddenly the Trusted Authoritative Voice is revealed to be an actual human being! BREAKING THE FOURTH WALL! I thought you weren't supposed to do that, not before the invention of Television! Also, electron have holes in the center? No, electrons are little half-inch paper circles, those "adhesive reinforcements" for ring-binders. Any office had little boxes with thousands of those white circles. Apparently the size of their animation-frame isn't tiny, not like a modern computer screen! Heh.

[@Les537]

NIce post. The 4th wall moment was a dramatic moment for a Navy training film :D

[@Anthonylopez-rd7nr]

I wonder if this fellow is still alive, so many years has past since this video.

[@FayazAhmad-yl6sp]

Not the year is 2023 the video was recorded in 1943 so it is 80 years old video, the instructor looks like 40+ years old if he was born in 1900 and he is alive then he is 123 years old. Their is no chance of that he is alive.

[@SoulEaterZika]

Thank You so mutch for share!!

[@HALEdigitalARTS]

Man, I miss these old films and the NAVPERS books... Thank you for posting this.

[@QbutNotTheQ]

9:39 The way he charged the capacitors was very dangerous 😮

[@sengokukaiser2200]

Wow I learned more in 20 minutes of this video than I did in a year of my electronics apprenticeship

[@sandpebbles]

That was great .

[@luminousfractal420]

if only someone had told me volts is a pressure measurement it would all have been so much clearer. thank you

[@michaelbauers8800]

Somewhere, I learned to think of electricity like water in a pipe. Pressure is voltage, flow rate is current, resistance is a matter of the diameter of the pipe. You can even sort of understand series vs parallel resistance thinking about pipes.

[@mariocesarsousa]

Very interesting to see the technology used.

[@StationGarageSt]

I now understand how the 555 timer works!

[@prabhakarv4193]

Very nice and useful information

[@DoNotEatPoo]

23:46 , this dude looks nothing like I imagined.

[@kenmore01]

Me too, I was surprised to see his mouth syncing with the narration.

[@rsheridan6]

He has an old timey voice. People don't talk like that anymore, and if they do they're super old, but those who did were young once.

[@thekidfromiowa]

The winner of the Frank Sinatra lookalike contest.

[@SangiTariq]

Very informative video 📸

[@marc-andrebrunet5386]

👨‍🏫👍I love the primary title : -Lectures discussion films review shop- 🤘😎very interesting stuff !

[@alvarbilly]

Wowzers.

[@bill-2018]

I wish I'd seen these films when studying for the radio amateur's exam. They explain it very well. G4GHB

[@robertbatista50]

I love old books and videos. How the charge is stored is incorrect however.

[@lionelshaneyfelt5607]

KZbin algo supplying thine gems.

[@PeriscopeFilm]

Help us save and post more orphaned films and get the inside scoop on Periscope Film! Support us on Patreon: www.patreon.com/PeriscopeFilm Even a really tiny contribution can make a difference.

[@TlD-dg6ug]

I feel like someone was desperately wanting a pool table in the Navy and used this as a smart ploy to obtain one for 'educational' purposes.

[@mysock351C]

I like the SpagettiO's for electrons. Now all we need is some quark marinara sauce and we're in business.

[@StuReedy]

Don't let out the magic smoke!

[@markmalasics8413]

After 2 minutes of splices, cuts and missing material, we get our first ad.

[@mepacrina9291]

Do not complain useless. Use adblock ! is free ;)

[@TheSwartz]

OOOhhhhhhhhh......... That's why they're called "Condenser Mics".... ahhhh.... I always wondered why.

[@jaygreider4753]

I was a radioman/crytographer in the Navy during Vietnam. I never opened a unit. That was left to the ET's.

[@PeriscopeFilm]

Thanks for your service to our great nation.

[@thekidfromiowa]

The ET rating evolved from the RT rating after the war.

[@shanejohns7901]

I'd love to know where the US Navy requisitioned the tire from. :)

[@prakharmishra3000]

9:56 did he really hold 800v carrying wires in both of his hands?

[@mangakadomingos292]

Please help,where can I find video about INDUCTOR OR INDUCTANCE?

[@tonytravert9944]

But for example, if I connect my computer to the power socket, when do the billiard balls come out?

[@creepingjesus5106]

It only works if your computer is the correct distance from a billiard table connected to earth. The correct quantity of balls will flow back up through the pockets, and as long as you break the table's earth, you can now proceed to play billiards. Unfortunately, once the balls go in the pockets, they they tend not to come back up spontaneously: this either means you've got an earth leakage problem, or you need to put coins in the slot...

[@fnkyearthling]

I want that oscilloscope

[@KaizerPowerElectronicsDk]

9:59 how to handle 800VDC :)

[@NotMarkKnopfler]

Legend says if you open up a battery it's full of billiard balls...

[@FayazAhmad-yl6sp]

Oscilloscope is fantastic may be its weight 20kg. The steam engine took 12 hour to warm-up this oscilloscope takes 24 hours for warm-up due to it tubes for perfect operation. The transistor was yet not invented.

[@CharlieRAnimaMX]

17:18 We are in 2021 and oscilloscopes are still very expensive, even to study electrical engineering they are almost relics that they do not even want to touch .... How much would have cost in the 30-40's that single channel oscilloscope?

[@falsedragon33]

You can get a siglent for 300 bucks. They aren't expensive. I got my first single channel in the late 80s and it wasn't very expensive.

[@TheSimoc]

@@falsedragon33 Yeah, nowadays you can have old ones almost freely, and even new entry-level digital ones in decent price. However, his question holds, how much might have costed in 30-40s. Guess quite a lot, at least as inflation-adjusted. I wonder if tinkerer had diy/impromptu scopes back then?

[@michaelbauers8800]

I have a handheld, LCD, two channel scope. I thought it was pretty affordable. Note that the cheaper ones can't handle high frequency signals, but can handle basic scope tasks. Pretty cool gizmo I thought.

[@Wildstar40]

Funny they used billiards to demonstrate these examples. I was taught the same way but the medium example was water. Electricity flows like water. For example, the resistance scenario using water, imagine water running through a hose, kink the hose and you have a point of resistance.

[@michaelbauers8800]

Having spent decades playing pool, I feel water is a simpler/better analogy than pool :)

[@TechnoW1zard]

6:01 There it is the accursed M for micro farads, but in SI units they should use the greek letter mu, “μ" for micro, instead of M for mega! This maddening atrocity goes back to 1943 at least? Utterly frustrating...

[@TechnoW1zard]

@Google user Then what letter was used for Mega units?

[@TechnoW1zard]

@Google user What letter did they use for Mega ohms of resistance or any other quantity to be measured in terms of Mega? That's my point

[@TechnoW1zard]

@Google user Ok then M means mega and micro at the same time, that's what's completely intolerable. The calculations based on that letter having two very different meanings can have terrible consequences.

[@TheSimoc]

@@TechnoW1zard They likely hadn't micro-ohm resistors either, so that was not so much problem. Of course good we have unambiguated system nowadays. There are also other deprecated linquistics, such as condenser, and capacity used meaning capacitance.

[@ericrawson2909]

It's not as bad as the way they used to use M instead of k for thousands of Ohms. So 500M on the circuit diagram is 500k in real life.

[@MAGnetICus_Attractus]

Where was this video 10 years ago when I had the FCC hounding my heels.

[@felixdiaz4438]

👌

[@teresawatson8936]

Now let's see the thevenin equivalent pool table compared with the norton equivalent pool table. LOL

[@falconeaterf15]

Witchcraft and Sorcery. !!!

[@liberalsockpuppet4772]

Nah brah, three phase AC current is sorcery. That physics hurts my head.

[@markhonea2461]

Digital multi meters are great, but they can not show the analog properties of many components, like the old Simpson V.O.M. .👍

[@sugumaranperiasamy7101]

Old is gold.

[@brucesmith9144]

The better DMM’s have a bar graph which is good at representing change in value and how close to full range on the instrument.

[@Aging_Geek]

What I missed is, what is the purpose of a capacitor. it stores energy but how does that benefit the cct.

[@Inflec]

Rewatch the segment with the narrator and the microphone amplifier. Probably the most common purpose of a capacitor is perfectly demonstrated right there.

[@heronimousbrapson863]

It doesn't. But it's great for shocking people at parties...

[@kenmore01]

It stores energy after a rectifier like a battery for example but a more perfect battery for short time use (like cycle to cycle rather than for hours.), or blocked DC like he mentioned between stages, while passing AC.

[@kenmore01]

It conducts AC but not DC. An inductor does the opposite (though both will pass everything if there is not a load, thus the resistor.)

[@Les537]

They are also used in analog tone circuits, such as amps and guitars to filter out high or low frequencies to ground.

[@MisterBonetti]

Who is the narrator/actor?

[@mrpsychodeliasmith]

Yes, who is it?

[@johndaugherty7465]

But...Scientology taught me that capacitance was just my Thetan at work. /joke

[@felicciasc]

Theta only comes in with AC

[@soilmanted]

Film does not not make it clear why decreasing the distance between the 2 plates increases the capacitance and conversely increasing the distance decreases the capacity. Same thing regarding the dielectric material. Why does denser material increase capacity?

[@mundymorningreport3137]

This was taught until 1896 when AC power was implemented and this could not explain how electrical systems did what happened. C.P. Steinmetz tried to get this idiotic model removed, saving lives and improving electrical engineering. Capacitors store and transfer energy across the dielectric materials between the conductors. Dielectricity is 1/2 the energy of electricity, magnetism the other 1/2. Only sometimes sourced with charge particles, but not the action of charged particles.

[@trejohnson7677]

Try getting young lads who were going to be shipped off to war to read Steinmetz.

[@mundymorningreport3137]

@@trejohnson7677 Good point, also his differential calculus was probably beyond most technicians. But, I always thought it was the corporate dollars put at risk by busting the lie that users loaded the generator. Only balanced transformers load generators. When you listen to music, the guitar doesn’t diminish compared to playing in an empty room. Any generator can source any load, if it’s output is amplified to the full demand. Electric cars and planes without distance limits are naturally possible with proper engineering (not limited by net chemicals in batteries.)

[@trejohnson7677]

@@mundymorningreport3137 To support that conspiracy, you're subsuming the group of people making these supposed decisions had fashioned for themselves a, at the very least, pragmatic acquaintance with the kinds of insights latent in Steinmetz work. That alone would be a "waste of resources". C.P. Steinmetz compositional flow is ridiculously unwieldly. One gets a sense of the kind of social ostracization he may have faced through many of his works. Take for example, the flow and continuity of the very first pasages of Steinmetz's "Theoretical Elements of Electrical Engineering". While a thorough treatment garners robust, self-regulating insights, it's hardly something I'd expect to happen en masse, ever.

[@mundymorningreport3137]

@@trejohnson7677 not at all. Industry funded education and dictated the materials approved for educated workers. Simple economics, not complex political intrigue.Or existential electrical theory. Steinmetz, being a crippled draft was politically tuned in and wrote on the subject of following the wishes of the power elite.

[@trejohnson7677]

@@mundymorningreport3137 Is that so? What are the names of the works?

[@m3sca1]

pulled along by tension...not pushed along by pressure

[@Disleelandia]

I hope more training was given before sending a soldier into battle to apply this info! LOL

[@rapiddog1491]

At 24:56 is that Vince Mcman from WWE?

[@mrpsychodeliasmith]

Vince Mcman wasn't born until 1945, and this film was made in 1945, so no.

[@rapiddog1491]

@@mrpsychodeliasmith Looks like him though. Time Travel maybe?

[@vhm14u2c]

💕🥂

[@Erintel]

Sounds a lot like HAL.

[@whatthefunction9140]

Please don't use a permanent magnet on your oscilloscope screen kids

[@williamchaves8938]

The answer is a commercial!

[@drtidrow]

0:55 Superconductivity had already been demonstrated by this point in time, so this statement isn't exactly true.

[@AlanCanon2222]

In supercooled lead?

[@drtidrow]

@@AlanCanon2222It was first discovered in mercury, immersed in liquid helium, by Heike Kamerlingh Onnes (the fellow who first liquified helium) in 1911. Lead came a couple of years later.

[@AlanCanon2222]

@@drtidrow When I was in "physics school" at U of Louisville, (which I never completed), it had just become possible to create wafers of superconducting material at liquid nitrogen temperatures (this was 1987-ish). I'll never forget gathering around in one of the research labs taking turns pouring liquid N2 from a coffee cup onto the sample Dr Ouseph had made. It was about the size of a US 5 cent coin, black, and could float a tiny sliver of permanent magnet (Meissner effect) for about a minute before it warmed up and needed another shot of cold. I was blown away: a phenomenon that one only read about in textbooks, demonstrated before my very eyes. My grandfather taught physics to Navy cadets that they called "90 day wonders" during WWII (civilian instructor at Murray State), and watching this film, I don't doubt that he showed it in his classroom back then. I never made physicist but I have followed the subject all my life.

[@AlanCanon2222]

@@drtidrow Thank you for the reference to Heike Kamerlingh Onnes, you've set me my next reading assignment.

[@clickbaitcharlie2329]

The navy should have taught the air forces to navigate, eh?..

[@lesbsocal9107]

Condenser

[@TriPham-xd9wk]

Gold is best conductor

[@heronimousbrapson863]

Actually, silver is best.

[@matthewprater7892]

@@heronimousbrapson863 You are correct but silver tarnishes. www.metalsupermarkets.com/which-metals-conduct-electricity/

[@felicciasc]

Condensor..

[@bill-2018]

Condenser.

[@thomaskallmyr]

ESCARGENCY RESEARCH TEMPUS OMNIUS REVELATHE

[@IamSchmo]

@19:45 "This mark represents the time constant ..." Which should be at, roughly speaking, somewhere north of 1/3 full scale (37%), but it's not. The scope trace is not moving downward either. This is because the actual demonstration, as far as the scope is concerned, is showing two RC time constants, i.e. the demo board and the input coupling high pass filter characteristic of the AC coupled scope. The scope should have been DC coupled, which may have been impossible as many scopes of that era where only AC coupled. Notice how, at higher frequencies later in the demo, the scope trace goes right through the marker line. That's a sure indication that the scope is AC coupled. @24:12 "This is a diagram ..." I have to call it an awful diagram! It shows the first amplifier's plate attached to battery positive and the second amplifier's grid attached to a negative. Although the plate should be positive and the grid should be negative, diagrammatically connecting them to batteries is crazy. Yes, you 'could' make this work by having an impedance on 'the other end' of the battery, but for some very good reasons it's not practical. Schematically, more correctly diagrammatically, a battery represents a voltage node, meaning there is no changing voltage. And they're trying to demonstrate changing voltage is coupled through a capacitor. ??? This oversimplification, if that's what it's supposed to be, bothers me greatly because this training film is teaching something that must later be unlearned. Perhaps the film's author thought his audience was too dumb to notice, so it didn't matter. :( I don't think a competent engineer ever reviewed this film. We actually won that war. How?

[@gp4themes758]

X

[@user-tj7bk7eb8f]

НЕЧЕГО НЕ ПОНЯТНО!!!

[@tommacdonald6070]

Somehow (I haven't figured out exactly) this film has got to be Racist.