Vacuum Tube AmplifierÂ
January 14, 2026  • EPISODE 293
đź“ŚÂ 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 »Â
About the Roger Billings Scholarship Program »
Thank you Dr. Billings for teaching us such interesting things!
Honesty is probably one of the most important things. Great live.
I love Science Live so much!!!
I’m so excited for science live my favorite class is science!
Honestly this is a great live with a great observation.
I never knew lightning actually heated up the air. I thought it was just a very powerful energy source, not that it generated heat too.
Id say that honesty is one of the important things we can have.
Interesting! Love it!
amazing live!
I’m glad they are honest!!
I love you science!
Hi my name is Jazae , this is my third time getting on acellus. I love this school so much, and I also love the lives.
This was great!
I love science.
this is really important knowledge
Hello everyone from Mississippi
Honesty is a main component to making us as a civilization function, its the nucleus in overall social communication. Great Live.
Honesty is one of the most important things a person needs.
I might have to buy a AMP now for a future guitar I might get
Honesty is so important!
Honesty is one of the most important traits about someone! Love you all!
Great live!
hello from Mississippi Cant wait to watch the video
Great video. Thank you
I love watching science live
Hi from Vietnam. I love this topic
i love science live!
hi from wisconsin
Love the video!
Honestly is a great thing to have I give everyone I talk to kindness and honesty
It was so nice to learn about Vacuum Tube Amplifier.It was great.
I really liked learning about the battery’s I’ve always wondered how they work.
Honesty is a very important characteristic to have!
Please talk about math
this episode was very fun!! honesty is very important
Loved the science live this week thank you!!
Honestly, this episode was amazing!
I didn’t know you could be enrolled in Acellus Academy and live in a different country. I enjoyed learning about the Lujan family coming all the way from Guam for the commencement ceremony.
Honesty is important
I liked learning about the carbon nanotube.
Keep going even when it’s hard!
It’s interesting that the carbon nanotubes are over a millionth of a meter, and it looks like it’s pretty tall. However, the size from what I can imagine seems to be really teeny tiny. The size is microscopic that we won’t be able to see them.
i liked the body armor part
This was interesting live. I can’t wait for next week
we love every episode
I am amazed at the Video content every week, love the Honesty portion and learning how USB drives came about as well. Great video!
I love these lives. I feel like these are so important.
Love from North Carolina!
When you heat air, some nitrogen and oxygen join together and create hydric oxide.
This live was amazing.
happy wednesday everyone:)
this would help a lot but could it be used for something else?
The fact that something like a drive could be important even now days. He is a my hero.
This was interesting to learn about the USB flash storage!! thank you for this live!
I love Science Live!
Honesty is the best policy.
Another good week of Acellus.
Once you learn to abide by honesty, you’ll notice some great changes in life
It was interesting to learn about how USB flash storage came about.
I liked when they talked about Dov Moran
Honesty is probably one of the most important things. Great live.
I love science lives!!!
Thank you that was very interesting.
Everyone should be honest!
hello from missouri! i love science live and learning
As they say! honesty is the best policy!
Thank you for all the good lessons in science live
Honesty is such an important trait and I loved learning about it from you guys.
Wow this video was very interesting and educational
Great video. We talked about these in chemistry when we we were studying the electron.
its gonna great being able to have safer batteries and lighter kevlar
i love science live, always amazes me
Honesty, is in my opinion one of the most valuable traits.
Agreed honesty is very important and I live by it. Aamzing live!
I love how they go into to depth about how the vacuums tube controls the electron flow and how early radios worked and shaped modern technology and radios
love the video! learned a lot
I love science live it’s the best lesson of Acellus
What time does science live start?
These lives are always so educational and entertaining its great!
This episode was amazing!
I cant wait to see the science fair projects
Thank you!
Honesty really shapes a persons character!!
I love science live
Got to love science live!
Thank you for making all of these super interesting and amazing videos, I really enjoy watching all of your videos and learning every single week. Your videos inspire me and make me motivated to do great things!
a really great live!
I love science live! and I agree!
So cool!
Honesty is so important!
Fantastic Live
Honesty should be within everyone!
The scientific method can be used for everything
I think it is amazing that the Carbon atoms will grow. I like how they can use this to make stronger material but also lighter and smaller material. I think this will help us with space travel.
Love R51!
This was a great live!
I love science live!
Japan is an interesting and unique country!! Very futuristic and smart. It’s a great accomplishment of theirs that they found that important bacteria!
Excellent live
Thank you
Honesty is the most important thing ever!!
I love science live!
amazing live
hi From Ohio
Best live I’ve watched yet
I love how engaging dr billing makes science
so excited to learn new things!
I can’t believe the USB came from Dov Maron’s computer not working, luckily it worked out in the end! It ended up being a very useful tool.
I love watching these but I been busy
can you make more funy r51 videos
Science live is the best way to learn!!
very informative and super interesting great live
Thank you for the video.
Hi from CT
I believe that honesty is the best policy as referred.
Hi from texas
Thank you for a great experience
nice video!
Honesty is always good! Great video.
very informative session. Thank you for these lessons
I totally agree that everyone should be honest!
Honesty is really the best policy!
Carbon nano tubes are pretty cool !
A vacuum tube amplifier or valve amplifier uses heated glass vacuum tubes to boost electronic signals
i love science
I can definitely respect honesty
It’s absolutely incredible how carbon nano tube’s are 100 times stronger than steel! Ontop of that I learned that they’re also 1,000 times longer than their diameter!
For sure ! If it hard keep going if you know whats good for you. How thankful we are for Acellus
I liked learning about the bacteria they will use to make sunscreen because I always thought that bacteria was bad for you!
I love science live.
Joining from SC!!!
I would love to participate in a science fair!
Great science video this week, loved it!
Thank You!
Acellus is great!
I thought the carbon tubes were very fascinating!
This was a super cool live !
Science for the win!
Amazing episode!!!!!!
honesty is good
I love how Dr. Billings explains things.
What made scientists in Japan get the idea to study bacteria to make sunscreen more friendly for the environment?
THANK YOU for videos to watch to learn about science
Honesty before anything!
As an honest person myself, I love hearing about honesty!
Science live is so cool always learn something new!
I am happy to be back from Christmas break.
Great lesson!
It was awesome learning about carbon nano tubes.
loved all of this live! super informative on so much cool things
Here from NY!
This was my first episode and I really enjoyed it 🙂
I believe that being honest is truly something that is amazing
maybe this is not for hydrogen but we are right now trying to learn about high and low acid in our bodies that cause acid reflux. Wish we were more edicated in that.
I think that it’s great that scientists are going to make phone and car batteries better. They are going to use carbon nano tubes in lithium ion batteries which will make the batteries last longer and holds more power and make the life of the battery last longer.
I like to read mysteries to.
I like the coding using batteries like doctor John
I always found the homemade radio thing with the cups so cool
This was super fun to watch!! Thank you!!
thank you
i love r51 *
i think the power going though the sppons and magnet were really cool.
wow, hydrogen cars are very interesting.
i liked this science live
Thank you acellus live! i look forward to it every week
It’s fascinating how we’ve advanced so much in technology.
I loved the cup phone.
Thanks for the good information!
Thank you so much for this live!! Hellow from minnesota!
Hello from NY
science lives teach so much
a space elevator???!!! wow!!!!!!
I love learning from science live!!!!
My Mom was listening with me who is Russian. She said the Babushka scarf also refers to Russian nesting dolls (Matryoshka). Hopefully Dr. Billings can find Jane Braden.
acellus is the best