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 »
best thing in my day, Colorado
How can I be a science live person like you and paja
Honesty is the best policy, as they say.
Being honest will help u alot
Happy Science live Wednesday!
Honesty is the best policy!!
Happy Science live wednesday
Hi from Utah!
I love learning more cause it gives me more knowledge for more work ethics and science
I love the science fair
Are pollution free cars something we can see in the near future?
Hey from Caili
What is the limit in science?, I never know what the limit is.
how is carbon still used today?
Are carbon nanotubes widely available or not quite yet?
Interesting stuff about computers.
how can I become a good scientist like you?
Hi
Good Evening from Alabama
Love it!
This is very interesting!
hi
What made you think of that?
Awesome
Hi
Like this live i been learning a lot of stuffs from this
COOL
lol very funny
hi from Alabama
So why we don’t use Hydrogen in machines?
very interesting live
Helloooo
How did Dr. Billings solve the Nitric Oxide issue?
hello from North carolina
I love math
So excited!
Good evening!
Hello!
Hi from Virginia!
i love r 51
Hi from MA!!
Hi from Texas!
Hi from Cleveland
Looking forward to more lives in the future!
Love this live !!!
How long will it take to get to the science fair?
Pollution free cars would be great!
Hi . Dr.Roger🙂 I love science .
i think this is the best way to learn about science in my apinion
This is great
Wow! You are amazing Mr. Billings!
Can you say my comment in the video my comments have never been said
Excited for the science fair, really want to participate
Yessss
Thank you for teaching me so many cool things!
Interesting live
so excited for this weeks live!
i love how they said that they try to make armor out of that material.
Learning about flash drives is fun
cool!
Hi from Mo! :))
hi guys
Hi 👋
fascinating
this is actually so cool-
I thought there would be more oxygen in the air.
i love that DrB always talks about both the ups and downs of his discoveries
Nice to know!
happy wednesday
I think Its important to learn about computers cause alot of jobs use them in there every day life
what up from Florida
hi from texas
hello from new jersey! I loveee science live! I find computer science so fascinating!!
I love Science
Hello from Tennessee! What might happen when the bad gas gets into the air, I know it will pollute the air, but what affects will happen?
Hello from GA
What year was the USB Invented?
hi from nj
i found it interesting when he talked about how the fire creates water
Hey from West Virginia, love the episode!
Hi there a good day
Its so cool how our technology now is so much more advanced then when we first started creating this stuff like: Airplanes, Submarines, Boats, Trains, Military systems, Medical tech, Cars, computers, phones, and other techy stuff. Furthermore, humans will continue to find more stuff to advance until one day it will be normal to own a space ship and fly through space or have a jetpack or other stuff
Yes sir
It was very intriguing to learn about how the creation of the USB flash drive was brought to life.
Thank you!
How do we stop pollution
Science Live is a interesting way to watch information, because science intertwines the things happening in the world today.
Wow this is very interesting! I love learning new information about science.
Love usb
Hi from Minnesota
I found it fascinating to learn about what inspired the creation of flash drives and how their development has impacted our lives.
Hey Ya’ll I love USB I live off of them
Hi from Texas!
What would a modern floppy disk look like?
I was excited to hear about the science fair
Wow! You are amazing Mr. Billings!
I like hearing about the science fair.
Hi from Tennessee
I was really interested to learn about how the flash drive was made and now that I think about it, our lives would have been so different without it.
hi
my name is Kacey
I’m really excited to purchase Roger Billings Book, with points earned from lessons!
What is the formula for nitric oxide?
Listening to Dr. Billings talk about his life stories is so entertaining yet interesting at the same time. Glad to be tuning in!
Best Thing ever and HI from IL
This is so interesting!
How long did it take you to make the hydrogen car?
Hello from MO!
wow
Second live of the year!
hello everyone
Hi keelan here from Texas
Is Mr. David and Mr. Caleb going to be here this week? I was so excited when the pole ended up being that they both can stay.
Hello from Kentucky! Interesting information on computers. Thank you!
Hi everyone
How does the ash turn to water? That is honestly pretty cool and confusing lol.
Dr. Billings dedication to science is incredible.
Hey from Louisiana!
Hydrogen is so cool!
loved the video this week:D
hello this is joelly from new york, i enjoy these science lives
Science live is always so interesting, i learn new things every week!
DR Roger Billings you are saying the best
hii i love sience live its very intresting
Hi
Hello there.
When is the high school graduation ceremony?
Here from New Mexico! Super excited to learn tonight!
I love this episode! I’m learning so many interesting things!
Were your hydrogen vehicles the first of their kind?
hi
I love live.
I learn a lot from science live.
That is awesome, making a pollution free car!
I hope everyone is having a great night, from Texas!
I really liked the live tonight.
I love these lives so much! Thank you for doing them!
Great job to Mr. Rodger Billings for not giving up on figuring out and trouble-shooting your engine problems!
I think that the USB is a good invention
Hello, I am Callaway from Tennessee and I love Acellus!
HI from MD.
so interesting! best part of my week
Thats cool that they have a science fair
here from missouri
How do you get involved in the science fair?
hey from MD… love the show
HI FROM DANVILLE!
Hello from Indiana!
What grade did you start your project on the hydrogen car?
I Love science Live!!!
Hello from California
Hello!
This science live is so good! thanks coming from Virginia!
LOVE computers
everyone on science live makes me learn so many new things!
cant wait to do the next live! so fun to watch this
Science fair is so much fun! Why don’t we see more hydrogen cars?!
Its so crazy how far technology has advanced in the past few decades.
Hi from Tennessee. This was a great video!
Science live is always fun to watch
Hello from Louisiana!
mr.billings how many years have you done this school?
I like listening to the science live!
Hi I’m Jayden from VA
HAPPY NEW YEAR -Arab AL
hiiii
hello from GA
Science live is so convenient to learn new cool things!
hello from omaha Nebraska big O
Science fair?
Howdy from Tennessee
hello this is hayzer from missouri
What are the primary environmental benefits of using hydrogen cars instead of traditional gasoline vehicles?
I put photos on a flash drive.
hi! this is Virgil from Ohio.
I love science, computer science is my favorite and I love the evolution of computers throughout the years!
Science live is always so nice to watch for information
i like science
Hello. This is Ameer from California.
Hi from USA
Happy Wednesday!
Happy Wednesday
I love learning about computers and and USB drives I love technology Happy Wednesday Everyone!!!
I’m from Maryland I’m 10 and I have Otisum and ADHD
Hello, I like learning about computers.
Heyyy from Nebraska happy Wednesday
Hello science live
Greetings from North Carolina. Great live tonight, I always enjoy them. Great information on the flash drive, that was neat.
Happy Wednesday!
wow thats really interesting
Wow!