Radio Electronics History: Radio Receivers 1949 Antennas, Superhet, vacuum tubes
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- Опубліковано 22 бер 2022
- Vintage Electronics: Radio Technology Training film of 1949 covers basic principles of RADIO RECEIVERS. Very technical and but well-paced instructional film shows all the major components of RADIO and how they work, using a large wall-sized demonstration panel. Good information for beginner or intermediate level knowledge. Partially restored from 1949 16mm film, originally produced by the International Civil Aviation Organization (ICAO), and distributed by the National Film Board of Canada. Good condition for a 72 year old documentary. (Upscaled to show detail of the demonstration panels.) Run time: just under 28 mins. Uploaded by Computer History Archives Project for educational and historic value. (We actually learned a lot watching this film, hope you enjoy it as well! ~ CHAP)
Segments:
00:20 Helicopter takes off; pilot adjusts his radio
01:00 radio antenna diagram, with tuner, detector, reproducer
02:03 vintage crystal radio set with crystal diode
03:07 Large Demonstration Panels showing a working model of radio receiver are explained
04:05 block diagram of how a radio receiver functions
06:17 wall panel illustration continues
06:30 Oscilloscope is used to observe wave forms
07:00 Signal Generator is used to modulate a carrier wave with a test tone
(using a “Heathkit Laboratory Generator”)
07:33 Oscilloscope connected to antenna shows signal wave
08:00 Explanations of different types of tubes in a receiver circuit
17:40 Oscilloscope signals demonstrated (in and out of phase)
Experimenting with different circuit configurations, discussion of
superheterodyne, use of tubes vs. transistors, etc.
Definitions:
A superheterodyne receiver (often shortened to superhet) is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
ICAO
The International Civil Aviation Organization ("ICAO") is a specialized and funding agency of the United Nations. It changes the principles and techniques of international air navigation and fosters the planning and development of international air transport to ensure safe and orderly growth. Its headquarters are located in Montreal, Quebec, Canada.
With special thanks to Speakeasy Archives for digital scanning of original film.
www.speakeasyarchives.com - Наука та технологія
I actually understand things better with older books and videos.
That was brilliant. Straight back to basics.
I love the demo equipment, such a work of art.
I love these old training videos. They always do a great job explaining things. Thanks for saving this and sharing it with us.
Glad you enjoyed it!
It's always good to watch these at night
Ein sehr guter Filmbeitrag mit anschaulichen Animationen. Wir vergeben für diesen Filmbeitrag von maximal 10 Bewertungspunkten: 9.
Vintage Electronics: Radio Technology Training film of 1949 covers basic principles of RADIO RECEIVERS. Very technical and but well-paced instructional film shows all the major components of RADIO and how they work, using a large wall-sized demonstration panel. Good information for beginner or intermediate level knowledge. Partially restored from 1949 16mm film, originally produced by the International Civil Aviation Organization (ICAO), and distributed by the National Film Board of Canada. Good condition for a 72 year old documentary. (We actually learned a lot watching this film, hope you enjoy it as well! ~ CHAP)
Cool demo! Explaned well enough for even ME to get a handle on it! And a strikingly early mention of the transistor was unexpected!
Bello! La "radio a supereterodina" spiegata nel dettaglio ma in modo semplice!
what intrigues me is the mixing the combining of the converter tube. how the 2 signals super impose on each other and mix in the electron cloud stream. fascinating. this video real good one.
Glad you enjoyed this one. Thanks!
Everything about radio receivers is always a fun time for me! Thank you so much for this video.
Hi Leandro, very glad you enjoyed it!
Best explanation ever
Edwin Armstrong was a genius.
VERY GOOD VIDEO....THANK YOU
Yes, the video quality is very
badly, (maybe because
damaged by time),
but contents of it is really
excellent.
Thank you for sharing
Actually sound must be recorded for AM.. In AM tao identical side band exist... To save spectrum, one is chopped out... So with limited band others feature of sound are vanished and a robotic sound with no emotions come out.
It started with Amplitude Modulation (AM) then became F*cking Magic (FM). Funny enough I deal with this daily in modern optical version in the field of Doppler LiDAR,
Excellent video. Thank you for recovering and posting this masterpiece. Would you be able to provide the schematics and list of components?
Again, thank you very much.
Hi @guilhermecosta3191, thanks very much for your feedback. Glad you enjoyed this vintage film. It would be great to have more info on the schematics and components, but I am sorry they are not available to me. Perhaps somewhere on the Internet there may be some bit of help. Thanks again! ~ VK, CHAP
Thank you again.
Дуже важливо знати
Dangit, 3rd this time!
1949? Transistors?
May be 1953?
~ The first transistor was successfully demonstrated on December 23, 1947, at (ATT) Bell Laboratories in Murray Hill, New Jersey. They may be older than one thinks. : )
@@ComputerHistoryArchivesProject yep, w shokley, im readed yet.
Probably at least 1953. Likely more like 1956. The transistor was little more than a laboratory curiosity for the first few years after invention. The first commercial transistor radio didn't appear until the end of 1954, and it was little more than a very expensive toy.
They should try to improve the quality of the video before send it to youtube.
The original 16mm film was very damaged and this uploaded version has been improved greatly over the original. Sometimes, there is only so far one can take a film that has extremely deteriorated emulsion. Thanks for your input though. ~
@@ComputerHistoryArchivesProject job well done
Thank you
По-английски лучше понятно, чем на русском.