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 »
Woah! Constantly learning as I watch!
I love Acellus so much.
I love Science Live.
thank you!
I love science and finding out how things work.
I can’t wait until acellus world.
I love science live and I wish I could meet r 51 and dr.roger billings and dr.pajet monet.
Comment I love Acellus! Mr Billing is good at science and very emotional 😂
The cup phones are so cool!
Exciting to see how advances in technology is not always about a completely new advancements, but often times bringing different types of technology together to create a new product or technology. Enjoyed learning about the history and progression of the flashdrive.
Science is so cool esp this episode!!!!
I enjoyed learning about amplifiers.
Great episode this week, I really liked the r51 section. Can’t wait for next week.
The vacuum tube ampflier is very cool, this was a very good episode.
Hydrogen cars are a great idea
My grandpa showed me binary with a light switch.
This was a really interesting episode 😀
this is so cool
I love these lives I learn something new all the time and new words.
Thanks for all the info! Silly r-51!!
Enjoyed hearing about the quantum computing and advances in the carbon nano-tubes. Excited to see what the future holds.
I learn something new every single time!
Loved it
I love science live!
When is the science fair? How do you submit my prodgect?
This episode of Science Live was very interesting!
Science live is fun!
The cup phones was fire.
Thank you proteges for the Vacuum tube explanation
The amplifier was so cool!
I love science live so much it makes my day better
Hello from lexington!
Can I test how different ingredients change how much the muffins or other baked good poof up in the oven for the science fair?
I enjoyed watching Science Live!
This was great episode.
Favorite episode so far!
I just started two weeks ago, I love this program so far!
so cool
Never knew carbon was like that
I would love to go to the science fair!
WOW, this video is fire, and funny
Cora
I loved the plastic cup phone!
Todays video was amazing!!!!!! I learn new things every week!!!
I hope science helps you find her. I also found it neat about the lawn mower
I’ll be looking for details on the science fair, I really wanna go
This was such a cool episode!
This video was actually very interesting i always look forward to watching these!
This was cool
I always learn something on Science Live.
Science live is the best
Learning something new keeps me coming back to Science Live! Hydrogen car was insane!
science live is sooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo coooooool
I liked when David and Caleb talked about the Vacuum Tube Amplifier which boosts sound.
The science fair sounds so fun!
Space elevators would be so cool!
i want to go to the science fair
thank you all so much for taking the time to make these episodes!
It’s so cool that they can amplify the sounds or power of a signal!!
This is so cool!
I really like the videos
I learned something new every time I watch .🙂
Amazing
I love the vacuum tube! I want to make my own!
Everytime I watch it’s a new thing I learn
How strong is the carbon bond?
dr john!!!!
The vacuum tube amplifier was great.
It’s so fun learning with Acellus!!
This was a really cool episode! I learned lots!!!
I love Science Live! I learn something new every time I watch.
cool!!
I think that the idea about making phones and computers have more battery.
Their lives are always educational and fun.
This is by far my favorite episode so far!!!!!!
A hydrogen car is such a cool concept!
My gram wears a babushka sometimes. Did Dr. B find his friend from the science fair? We need an update!
I love science live!!!
science live is always so enjoyable
I really loved this one!
i love your show
This was cool!
I liked hearing about your hydrogen car. It sounds really neat. Where is the science fair at
This is always so interesting !
i love this episode so muchhhh!!!
I really like watching science live
this is so cool I learned so much!!
I learn something new everything I watch!
this is great!!
amazing episode. and i love mysterys.
I love science live!
Wow, I’m amazed with science.
This episode is so cool
I love science live!
wow ❤️
GREAT VIDEO
that was awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
an international science fair sounds so cool!
i love science live so much!
these videos are so awesome to watch it a something new everytime!
Wow! I learn something new every week its so fun and cool to be able to experience science live!
Can you do more about carbon nanotubes? I liked that.
Science is so cool!
Dr. John has some pretty cool information in these videos! 🙂
I love it
That was very interesting!!!
This was so amazing i love these
Vacuum Tube Amplifiers are so cool, thank you for teaching us.
This episode was so good! R-51 being hilarious as always.
Great episode
Thank you Acellus for SCIENCE LIVE
Hydrogen cars are so cool.
Science live is so cool!
DR john!!!!!!!!!!!!!!!!!!!!!!
Honesty is the best policy!
Great Show!
Hello from Tx! This science live was very interesting!!
R51 love it
I love Science Live! I thought it was interesting about the nitric oxide.
I liked todays sience live a lot, I’d like to be in the sience fair this year but we live all the way in Florida and the sience fairs in kansas city and Acellus World too bro. Don’t know if I can make it but hopefully, And r-51 was so funny today 😉
I LOVE SCIENCE LIVE ALREADY ITS MY FIRST DAY OF HOMESCHOOL
What is the coolest thing that hydrogen is used for?
Where is the Acellus fair located it seems so fun!
I love that this is weekly, its so fun!
I think the nanotubes are neat.
this lecture was amazing!
What I learned in this video is the triode is advanced because we get to control the amount of power through the electric currents. If in a concert we could plug in the instrument into an amplifier which would make it so that everyone could hear.
These are always so interesting.
What a cool concept
I love learning about early forms of technology like the radio and the computer!
How do you feel about AI almost re-inventing everything?
Very funny at the end!
Cool episode!
could a vacuum tube amplifier make a tv louder.
How does one go about making a hydrogen car In High school that’s super Impressive
The science fair sounds fun!
Very cool. Thank you
I learned somthing new again! How!
Love science live!
It is crazy how much Science helps us!! Science is so awesome!!!
I enjoyed the video!
I’m excited to see how far the hydrogen cars will go in the future!
I love these videos
Enjoyed learning about vacuum tubes! Thank you for another episode!
That hydrogen car was cool
when is the science fair???
I like how you explained the lightbulb
That was cool.
it is cool they are using the carbon nano tubes to make body armor!
Very cool!
The carbon nano tubes are cool.
can’t wait next episode!
I learn something new everything I watch!
same
Don’t you just love school especially science live
Im new to Acellus and I already love these science lives!
Hello from kentucky
learning about science is fun.
Hydrogen cars are the best!
I loved seeing the skits at the end! I love Science live!
Science live is so cool! I wish i could go in a hydrogen car!
I love these videos, Dr. Roger billings is so wise.
I love science live!
Science live is so fun!!
I love the R51 part
This episode was fire!!
Best science live video
I’m happy you promote honesty in your experiments and projects. Even if it doesn’t look great it is better than lying and potentially hurting others because of it. This gives me hope about our future scientists watching this and being influenced by you!
I used to make cup phones when I was younger
The vacuum tube ampflier is so cool, being able to stop or asellarate electron flow.
How long would you say until the “next generation” of computing?
I would like to use sunscreen that is safer!
another great episode!!!
Where is it located?? i really wanna go
It’s really interesting how the tube amplifier is able to accelerate or stop the flow! Can you go deeper into this topic again?
I would like to make an R-51 radio. That sounds very interesting.
Is the science fair in Missouri?
kansas city
Carbon nanotubes are very interesting this technology will one day change the way we live.
I always love Science Live!
R51 is funny
I bet the science fair is really fun!
Hydrogen cars are so cool!!!!!!!!!!!!!!!!
i loved the cup phones
It was cool to learn about how amplifiers work!
I LOVE science live
This is great info! I learned so much. I look forward to the next Science Live!
Where is the science fair located?
This episode was awesome! I love Science Live!!
The science live is in Acellus in Kansas City right? And when is it?
yes it is in kansas city missouri and the science live is on wednesdays. it starts at 7:00 pm. I hope this helps. My name is londyn and i have been doing acellus for almost 3 years now. I would love to know how long and when you started at acellus. I hope this helps and ty for being at acellus.
My favorite segment is breakthrough moments in science! Dr. Tobias always has something cool to talk about!!
The science fair sounds fun!
The carbon nanotubes are really cool
I like to see the new graduates congratulations !
I LOVE science live!
The Area 51 is my favorite part. it’s always super funny!!!!
I loved the plastic cup phone!
The two graduates from Guam really inspires me because, i am using Acellus so i can continue with martial arts!
Hydrogen cars sound so amazing!
It is amazing what Science can do. Space elevator- wow!