The Superheterodyne Radio: No really, that's its name technology connections

by royajade123VGUYF

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The superheterodyne receiver may seem like a radio with a silly name, but in fact it’s a completely logical name that describes the key action these radios take to become excellent radios. The superhet solved a tricky problem in a clever way, and using our friend Algebra (as well as wave phenomena) proved to be the most effective way of tuning in a radio signal.

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Jenn W 25/09/2021 - 11:58 Chiều

"Because there's a difference of one Hertz. Hert?"

garbo 25/09/2021 - 11:58 Chiều

I have a great model in a nice wooden case that I purchased used 50 years ago. Has 5 radio tubes. The 35w4 is the rectifier tube. Also has a 50c5 12? 6( maybe 12au6 ). Anyway great thing that the 50 35 & three tubes starting with 12 means that these heater voltages for the tubes add up to close to the 120 volt line voltage. They wired all 5 tube heaters in series so a power supply was not needed for them. Our electronic shop teacher said it was the greatest radio design at that time. This old radio still works.only if it a few times a year while working in the garage but plays great and never had to replace a tube yet. Picked up a couple of the tubes super cheap when a local electronic store closed.

kingduckford 25/09/2021 - 11:58 Chiều

To this day, some of the highest end Ham radios use superhet. Only now is SDR starting to make major inroads, and superhet is still in many cheaper, as well as the most high end of two way radios. My Yaesu 5000 has double and even triple superhet receivers, and will go toe to toe, if not beat, any modern SDR radio on the market.

Shinra Kishitani 25/09/2021 - 11:58 Chiều

Fun fact! in some languages Capacitors are still called condensers

gameyord 25/09/2021 - 11:58 Chiều

Please, I beg you to talk about the crystal radio, it would make me happy =)

Go Fish 25/09/2021 - 11:58 Chiều

Caps are still "condensers" in some languages

tundra lilac 25/09/2021 - 11:58 Chiều

But howwww does amplitude modulation encode the sound instead of just making a single tone at the carrier frequency just sound louder and quieter and louder and quieter???

Harry Hollin 25/09/2021 - 11:58 Chiều

Have you ever considered making a video about DAB digital radio that are used in some countries such as the UK?

Grahame Manns 25/09/2021 - 11:58 Chiều

That is the best explanation of a superhet I have ever heard. Thanks for that.

pmailkeey 25/09/2021 - 11:58 Chiều

7:13 look at that ball bearing on the tuning variable capacitor !

livingdeadbtu 25/09/2021 - 11:58 Chiều

Superheterodyne is why radios are not allowed on an airplane. The internal transmitter is the part that interferes with the plane radios and navigation.

Michael Bauers 25/09/2021 - 11:58 Chiều

It's a fantastic idea. Just silly that it was used in marketing, as if it was unique to specific radios. Guessing all radios in my lifetime used it, or nearly so ( b. 1965)

Jim F 25/09/2021 - 11:58 Chiều

404: Could Not Be Found. Now I get it!

Thor Najal 25/09/2021 - 11:58 Chiều

I'm convinced that the 199 dislikes are from engineers who wanted a more deep dive into signal oscillation.

As a cable t.v. installer I loved this. Its amazing how this principal is used today in over the air and "cable" t.v. use.

solum_mirari 25/09/2021 - 11:58 Chiều

Listening to the interference between waveforms is something I was trained to do as a musician. If you’re playing in a band or orchestra, it’s really important to be able to hear that “wobble” of interfering wave forms because it means that someone is playing out of tune. The explanation given in your video is MUCH better than the explanation I was given when I was first learning how to tune my instrument. Great video!

Robert Hanulec 25/09/2021 - 11:58 Chiều

In high school electronic class we had to assemble a five tube superheterodyne radio. The final exam included drawing the schematic from memory.

Chris Anastasiou 25/09/2021 - 11:58 Chiều

Amazing video!
Also, at 1:55 This is a trick guitarists can use to tune their instrument! Produce what should be the same note on two strings. Increase or decrease the tension of the string you know is out of tune, until the beat becomes so slow it practically doesn't exist

rashkavar 25/09/2021 - 11:58 Chiều

This kind of stuff is absolutely fascinating.

bwtv147 25/09/2021 - 11:58 Chiều

Superheterodyne is just a flowery marketing term. The radios were originally called heterodyne receivers. RCA marketing changed it to superheterodyne to promote sales.

The King in Yellow 25/09/2021 - 11:58 Chiều

7:43 yeah. um it's that tank circuit just before the 7B7 that's doing the filtering. The tube is just amplifying the filter output


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