U.S. NAVY WWII RADIO TECHNICIAN TRAINING FILMS INDUCTANCE & CAPACITANCE PHASE COMPONENTS 46384
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Made by the Burton Holmes Films, Inc. during WWII, RCL Part One and Part Two are b&w educational films made to train Radio Technicians for the U.S. Navy. The film was number MN-1540c and officially referred to as "Resistance and Capacitance RCL" and described this way: "Current and voltage in relation to time. Voltage and current curves. How current and voltage leads current in different instances, and relation of current and voltage. Graphic methods measuring voltage at source, addition of phase components, and effect of impedance on resistance." The film uses a variety of techniques to present information, including live action, animation, graphs, and combinations of live action and animation. It discusses capacitors, inductors, radio apparatus, alternating current, and, in part two, the addition of phase components, resonance and frequency, and impedance, and a demonstration of audio filtration is shown. Copyright is 1944.
Opening titles: United States Navy Training Film - Radio Technician Training Series RCL Part 1 (:06-:26). A man holds a capacitor, which is a device that stores electrical energy in an electric field. An Inductor is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. A capacitor charge is explained and shown in a diagram. Condenser drained of its charge is explained. A current with a charge or a discharge is explained (:27-2:12). Charge and discharge currents. Recharge curve. A current in relation to time is shown via a diagram. Voltage in relation to time (2:13-4:04). Volts and amperes. Voltage increase, current decreases. Title: Voltage Curves and Current Curves. Battery voltage, current curve, condenser voltage (4:05-6:41). Alternating battery voltage graph, a line moves and is explained. A sine wave is explained and shown on an oscilloscope. A pendulum. A balance wheel of a watch (6:42-8:21). A sine wave sound is reproduced with a musical quality. Inductive circuit is explained and shown on a diagram. Capacitive circuit (8:22-10:04). Title: Phase relations of Current and Voltage. Sign graph shows voltage and current in phase. Different phases for current and voltage are explained (10:05-12:51). End credits (12:52-13:11).
Part 2 (13:12-13:20(: Addition of Phase Components. Different circuits are explained. OHMS, an ohm is the SI derived unit of electrical resistance. Volts are dropped and measured (13:21-15:25). Sine waves. A compass is used for writing and charting on the graph. A three and four volt sine wave. Ohms Law. Four volt peak (15:26-17:22). Hand uses a compass and writes on a graph. Voltage meter (17:23-18:32). Title: There is another method of adding out-of-phase voltages. A voltage cycle shown as a wheel. Resistance voltage. Inductive voltage leads resistance voltage is explained and shown. A line is drawn with a ruler (18:33-20:12). Sailor sits at a table using a ruler. A right angle is drawn. A straight line is then drawn and makes a triangle. Volt meter moves (20:13-22:07). A book is opened and it shows an example of the theorem of Pythagoras: the theorem attributed to Pythagoras shows that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. Impedance is the effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance (22:08-23:55). IZ squared + IR squared + IX squared is written, the I's are then taken out. Frequency increases, reactance increases (23:56-25:42). Graphs on frequency. Inductive reactance. Dotted line moves through a graph. Impedance (25:43-27:42). Circuit impedance. Graphs with straight lines and dotted lines, this is explained (27:43-29:01). Title: The effect of Impedance at Resonance. A sailor explains audio filtration using his voice, which is being recorded through a ribbon microphone. At resonance the impedance of the circuit is equal to the resistance value as Z = R. ... At high frequencies the series circuit is inductive as: XL Greater Than XC , this gives the circuit a lagging power factor. The high value of current at resonance produces very high values of voltage across the inductor and capacitor. Inside a vacuum tube type radio transmitter (29:02-32:08). End credits (32:09-32:54).
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
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Wow. This is one of the best explanations on LC circuits I've ever seen. Infinitely better than our EE professor. This should be required watching for all EE101 classes.
Was thinking the same thing.
I love watching old training videos, there's a lot of great stuff. One thing about older electronics coverage, is that some of the names have changes ( to protect the innocent?) For example, I don't think the term condensor is used anymore, and is a bit non intuitive as a term. Periscope films specializes in archiving these old films.
As I'm watching them talk about inductance and capacitance and resonance, it took me a minute to realize that I'm watching the principles of how to tune a radio to the correct frequency of the carrier wave.
When that clicked, it blew my mind
i love these old military training videos
A more intuitive explanation than that given by electrical engineering professors, I imagine.
The Golden times when condensers hadn't been renamed to capacitors yet.
My dad was a radioman on a destroyer escort in WWII in the S. Pacific. I can see him viewing this film in his training....
I"d love to see those technical videos in a playlist! Sometimes it gets quite hard to find them among the other ones!
Yes and sometimes hard to get them in right order learning-wise. Still appreciating them for being there in first place.
Still very useful and current! Also better (simpler) explained than most of the teachers do these days.
It means the teachers or instructors did not know a jack or are too ignorant to be so. Concept is very important with theory is to back it up. In academic environment, schools just throw a bunch of meaningless numbers at people that cause more confusion than enlightening.
Gold
A very good and clear demonstration. So important to clearly demonstrate practical applications, that often is taught in non engaging academic ways.
TY so much for sharing these videos.
As a naval ET in the late 70', 80's this was part of our BEEP (Basic Electricity and Electronics ) course. "Filter number one".
Those that made it after that went to our "A" school for another nine months. Either radar or Comms.
And if made it... then to "C" schools which were highly specialized. And I think somewhat queued to your graduation rank in class?
I still remember the aid ELI the ICE man !
All I can say is that I never needed more than a fraction of what they taught me going into the civilian world. What was considered 'Basic electronics' ... then into advanced training. Not everyone made it and the graduating classes were a lot smaller than from when we started. Any way... to me this stuff is pure gold and anyone that 'gets it' wont need a resume.
Don't pass by this stuff thinking it is simple and due to mathmanship therefore easy.
.After edit. Reading comments just want to add my "BEE "and "A" schools were in the USN base at 'North Chicago'. "C" schools at Mare Island (CSTSC, CSC)and (MOTU) San Diego.
I think there is a near 100% chance my grandfather saw this when he was at Monterey in 43, unless he graduated before it was published.
US Navy training films are the best!
Very well in tuned with my own training in the Navy in 1972. We were given a cheat sheet of all of the formulae of Ohm's Law and reactance circuits including determining phase angle and Quality (Q).
Damn!! Pythagoras for the win again! In all my electronics training I was not taught the relationship of LCR and the Pythagorean theorem. I was always taught it in algebra, trig, geometry and calculus, but not that I can remember in AC theory. Garry Kiefer was my high school vo-tech instructor and he was retired Air Force and a great instructor. I miss all the times in lecture and lab, that was some great fun and learning was fun. These old videos remind me of those day and my wonders were satisfied. Shout out to vo-tech instructors and ex-military who instruct others of the engineering and practicality of electronics.
Great job! This series really should be in a playlist,
I love these instructional videos. Thanks for the upload! This is fascinating.
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This is a pretty good intro series tbh👍
These early US Navy Electronics courses were very thorough. As best as I remember the course was taught at Navy Pier Chicago and a few other locations including Treasure Island during WWII and lasted for 6 to 8 months and was basically a crash EE course (remember: no history, English, etc.. Just electronics.) with emphasis on Navy equipment. By the time I went to class A school in 1951 all the training was at Treasure Island and the course had been condensed down to 36 weeks. But it was still very thorough,
also Monterey
Thank you so much
Wonderful video !!
I wish this had been available when I had to take electrical engineering courses. I took two as an undergrad at Penn State, got A's in both, and didn't learn a thing. Seems like the EE professors and textbooks go out of their way to obfuscate rather than educate.
Amazing explanation and animaation.
Very clear explanations. Fantastic.
As an edm producer i love how they say square and saw waves are never used for audio
Imagine that . Surface mount vacuum tubes !
Thank you for uploading such interesting videos,.....
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These technical personnel were undoubtedly more intelligent than their commanding officers!
No one ever said it took a genius to be a CO.
That’s a queer thing to say, what makes you think that?
These are great videos! But why the timestamp? It blocks some of the scene and in this video, was kind of distracting.
Very informative. Thank you
9:14 Always wondered what a saw toothed wave sounded like... lol
Yep the Navy schools presented everything fairly well. The audio visual lab in Memphis was the only way I could retain the enormous amount of info. 82-3
That guy is using the pencil like he's engraving hardened steel …
How might we get access to all the videos in the program in a sequential order?
If the narrator's voice sounds vaguely familiar, it might be because it's Ronald Reagan around age 33. This film and its production company aren't catalogued on IMDB but Reagan used to do uncredited work around that time. I could be mistaken. If anyone can help corroborate, please post a reply.
Thanks- நன்றி
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These videos are amazing! also makes me wonder, the governments willing to teach its sea captains but not school kids.. Hmm wonder why? anyway, these are really great videos I wish I could have watched a long time ago!
National defense has a separate budget from the many local k through 12 school district budgets. Tax revenue varies more so with all the various local education systems of government.
You would think they would have figured out how to eliminate tape hiss long before the first Walkman.
Дуже важливо знати
This explains it very well.
G4GHB
What's the purpose of the "PF# 46384 00:06:25:17" time displayed on everything on this channel? It ends up blocking lots of information.
Fantastic! I like to restore old tube amps, a hobby of me.
It shows also HOW the computers dumbs us down! Surely it's helping, but finally I think the HUMAN should be in the center. Due to CAD and CNC there are more and more few "craftsman" able to do it WITHOUT these black-beetles called IC's/ Chips.
THANK you for uploading and scanning this fine 16mm Film! As always, keep the film in stock, as it lives longer than digital stuff. Or even better - make copies of NEW 16mm Film stock of your most precious old 16mm films.
Kind regards and cordially,
Géréon
Where's part 2?
ELI the ICE man 2023
1/4 PIIS ALWAYS THERE USED AND NEVER SEEN STANDING ALONE 90 DEGREES
As good as any khan academy film
ESCARGENCY RESEARCH TEMPUS OMNIUS REVELATHE
ESCARGENCY
Ronald Reagan?
In Jesus' Name, Amen. God bless you ✝️
This time stamp is ridiculous
Here's the issue: Tens of thousands of films similar to this one have been lost forever -- destroyed -- and many others are at risk. Our company preserves these precious bits of history one film at a time. How do we afford to do that? By selling them as stock footage to documentary filmmakers and broadcasters. If we did not have a counter, we could not afford to post films like these online, and no films would be preserved. It's that simple. So we ask you to bear with the watermark and timecodes.
In the past we tried many different systems including placing our timer at the bottom corner of our videos. What happened? Unscrupulous TH-cam users downloaded our vids, blew them up so the timer was not visible, and re-posted them as their own content! We had to use content control to have the videos removed and shut down these channels. It's hard enough work preserving these films and posting them, without having to spend precious time dealing with policing thievery -- and not what we devoted ourselves to do.
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How well I remember Treasure Island ET school 1958 and ELI the ICE man (and color codes BBROYGBVGWGSN.)😁
Voltage (E) leads current (I) in an inductive (L) circuit E L I and
Current (I) leads voltage (E) in a capacitive (C) circuit I C E.
And if you want to learn the way they did (in these videos) back in the 40's and how we did in the 50's get yourself a good K&E Log Log Trig or Deci Trig slide rule and learn to use it.
No wimpy handheld Texas Instruments calculators back then. 🤣