Vacuum Tube Amplifier
January 14, 2026 • EPISODE 293
📌 Science Fair Idea – R-51 Radio
What’s a vacuum tube amplifier? Come explore with Dr. Roger Billings on Science LIVE! Learn about the technology that made it possible to boost electrical signals and amplify sound. Discover how vacuum tubes control electron flow, why they powered early radios, audio systems, and computers, and how they shaped modern electronics. And get ready for something super exciting: carbon nanotubes – super-strong, lightweight materials that might one day help build a space elevator, opening new ways to reach space!
About DrB
Dr. Roger Billings is a visionary innovator whose work has touched the lives of millions of students and transformed the landscape of education. Widely known as “DrB” to the countless kids who benefit from his groundbreaking Acellus learning system, Dr. Billings has dedicated his life to advancing education through technology.
As part of DrB’s lifelong commitment to supporting education, Science LIVE was launched as a way to “give back” by mentoring students in conjunction with the Roger Billings Scholarship Program.
Read more about DrB »
About the Roger Billings Scholarship Program »
Hi Nicholas from Hollywood, Florida!
Hi from Missouri! Have a bit of a connection issue on my laptop! Hope still goes as well as normal!
Body armor lighter would be so much better and make for better movement
It’s crazy how long Carbon nanotubes are!
hi from Costa Rica
Happy Wednesday from Louisiana.
The carbon nanotube reminds me of Big Hero 6.
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I love learning!
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That is so cool! I didn’t know that carbon tubes were stronger than steel! How is that possible?
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Can we have a episode about black hole ,please?
hello from iowa!
Wow that’s interesting carbon nanotubes are 100 times stronger than iron
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I always look forward to tuning in every week
hi from pa!:)
That’s cool!
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It’s crazy how science works!
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hi from texas
I’m so excited for today’s live!
its very interesting how carbon tubes are made!
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Greetings from Japan.
Greatings from KS-I would say hello is ASL but IDK how to do that in the comment box. LOL
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Hello from Costa Rica
wow this is so cool.
Hey from New Mexico
What is a nano meter?
Hi from Mississippi
so so so so so so so so Cool
Hello, from Texas!
Really looking forward to this year!
greetings from Nebraska USA and i’m glad to hear that from the grads
Hi from Tennessee
How many carbon atoms in that size would it take to go from America to England?
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Love SL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Hey from Illinois
Hello from Illinois, the video is going very good and interesting.
thats cool
Hello! I love watching this!
that is cool I love to learn new things and that is so cool
its crazy how perfect the environment has to be to make it.
How similar are carbon nanotubes to carbon fiber?
I can’t wait 🤩
Hi from Illinois!
Hi from Mississippi!
hello
Hi from NE
happy wednesday
Hello from Florida, USA! So cool!
I’m from Florida too
thats very cool
I love science. So cool.
The applications for the carbon nanotube are very interesting. as strong as the compound is I imagine there must be hundreds of applications this compound could be used for.
Is it dangerous.
Hi from Nashville and Happy New Years everyone:-)
Hello from Maryland!
how is carbon still used today?
What would be their best use case if they ever managed to become viable?
Hello from DE!
Even though carbon is the building block of life, it amazes me how many things use them.
hello
hi from Florida!
this is awesome I learned so much
😎😎😎😎😎😎😎😎😎😎
hi from florida
Love science live
Hello from Illinois!!
Hi from Illinois.
What kind of structures can the atoms make is there a limit?
learning about the carbon atoms is interesting
What are some of the uses for carbon nanotubes?
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Hello from Buford, Ga.
hi
Here from mississippi
hello, from Vermont
how in the world would we even see those if their diameter is a millionth of a millimeter?
hello from El Paso Texas!! :}
Good evening all.
Hi from Nevada!
incredibly interesting. Tx
fun
Can they make the make the nanotube small and tight to make a sheet?
Hi
Hello from NC
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Hello from Texas! I’m always excited for Wednesdays!
Greetings from California.
What tool did Japan use to study bacteria?
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hi from Mississippi
I love science
Wow this is so interesting
Wsp from TX
That’s a cool carbon design
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I’m not late! Thank goodness!
Hi from North Carolina!
carbon nano tubes are pretty cool
My favorite teacher is Dr. Jonh
Mine is Todd Edmond
This could be the new strongest metal in the world! Cool!
Science is so cool
Do you guys always record your science lives at your hq?
Hi
Hello! From Illinois. That’s incredible! What is it used for in the world?
hi from Thailand’s
Can’t wait for this video!
Carbon is such a strong element!
Hii I’m so excited for this science live!
ello from Alabama
Hello from NC!
carbon fiber has always been a cool material to me
That’s cooooool
Hey from Georgia
Are carbon nanotubes widely available or not quite yet?
hello
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hi from texas
Sup Dr John!
midland Texas here
Wow that is really interesting on the applications possible for carbon nanotubing. The organic bonds linking the atoms make for very interesting possibilities.
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Wonder What We Will Learn Today 😮 🙂
Here from Maryland- This is Cole. I loved hearing about the two students who are graduates from Acellus. It was cool to hear how they are able to get all of their school work done but are also able to keep up with their strength lifting without worrying about getting behind on their school work. Great point! Enjoyed learning about them!
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Can’t wait for Dr.B!
It’s really nice and cool how there’s so many acellus students and graduates from all over the world! This live is great.
How could bacteria help with sunscreen .
hi from arizona
hello from CA and this is so cool to learn about
Wow!
Bacteria are really cool organisms! I never knew they lived in hot springs! Science live is cool!
We love science live!!!
Is paijet monet related to claude monet?
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Thank you
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this live is amazing
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Claire here from Mississippi
So interesting! Thank you.
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Wow! what a insparational story! I agree about how greatful i am to have accelus be so felxible.
how strong would a sword be made out of that
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I loved this so much
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hi from mississippi!!!!
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i hope yall have a nice day or night and thank you for the live video
Hi from Kentucky!
All of this is really cool
Bacteria is like mold in some ways.
What else can we get from harnessing the powers of special bacteria?
Hello from west Virginia!!! ❤️
Hello from NC