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 from Colorado
Hello
hello
hi
hi from texas
So excited for todays science live!
Hi from north Carolina so excited for science live!
HEY FROM MS
Leland NC exited for todays show
Hello everyone who is ready to watch science live 😎😎😎😎😁😎😁
So excited for this week’s science live!
Hello from Louisiana
Good evening from New Jersey
Hello from Kentucky
It’s so cool that they’re teaching asl
Hello from San Antonio,TX,
hello from columbus
hi from northern virginia
excited for science live !!!
Glad to view Science Live with my family every week.
Hi from TN
Amazing lesson
Hello from GA.
Hello from Utah
Hi from new york
Hello from North Carolina!
hi from Texas!
GO ACELLUS
hi from texas
Hello!! From Texas
Im so enjoying this 🎉
I love science live
hello from texas!!
hi from bliss, N.Y
Hi from Massachusetts!
Im so excited
Hello from Kentucky! 😀
Hi! from Georgia.
hii from ny!
Hi from Massachusetts!
Hello from Texas!
Hi im from Texes
Hi from Western Nebraska!!
Hello! AJ from Colorado here!
Hi from Nevada
Excited for science live tonight!! Also hello from Iowa!!!!
Hello guys from kc
hello from ga
DR.BILLINGS WE LOVE WHAT YOU DO
Hi, I’m watching from Hawaii .
We would like to have a special episode about space.
Thank you Dr Roger.
hello from Louisiana
Hello from Cairo!
I am thrilled for this new Science LIVE!
Hi my name is Emmitt. I am in Minnesota and it is cold.
History is one of my favorite classes
Hiii alyna from texas
Hello from VA !
hi guys i cant wait to see what will be here today!
and most of all I wonder goofy things what r 51 will do today’s video
hello from va!
Hello from New Mexico.
Hello from north carolina
Hi from Tennessee
hey guys!! i hope yall are having a wonderful day!!!
Greetings from North Carolina!
Hello Jack from Nebraska
Rachel from North Dakota.
very motivational I love the encouragement
Thank you for all the inspiration! I love Science Live!
Hey everyone. I hope you all had a great day!
Hello everyone.
hi from nd
Hello, McCoy from Michigan!!
Hello from Louisiana
excited for breakthroughs in science
Hello from California!
Excited to learn something new on this Science Live!
same
Hi! from NY!
Wow! That’s cool
Hello here from Texas!!!
Good evening science live!!
Hello from Texas!
Hello! Ava from North Carolina!
Hello from Texas!!
hi
Good evening. I can’t wait for today’s Live!
Hello from MO
Hello from Las Vegas.
Hi from South Carolina !!
Paget please read my comment and give me a shout out
Hello from Kentucky!
Here
Hello from Ruskin, Florida
Hello from LA
Hello from Australia
Hello from TX!
Hello from kentucky
hi from Enid Oklahoma
hello
Hi!! Kallie here, loved the video!
hello from sc
Watching from Georgia!
hello
Hi from Virginia!
Here
love thisssss coy nv
Hello
Why are the robots getting smaller?
PAJET READ MY COMMET PLEASE
YES READ THE COMMET PAJET!!!!!!
hello, dr. roger
Hello, from Wisconsin.
I’m so excited for this science live!
Hello from Montana!
Hello from New Mexico.
hello from new jersey!!
Thank you for teaching us these things! It’s an incredible to learn all about the science world to this day! It’s truly an experience to see everything happen at once! Science never fails to impress me!
hi from louisiana
Hi form NC
Hi DR.B. Where’s R-51?
Hello from Australia
HIIII
Can’t wait!!
hi
issac from MD
heyyyy
Excited to see what the lives about!! Big hello from Illinois!
hello from la
Hi from N. E.
Hello from Texas
Hi, really excited for the show tonight!!
hello from NJ
Hii from Wisconsin so excited!
Hello from Irving, Texas!
big thanks to everyone that made effort in this live stream
This class was great.
hello! It’s Skye from Mississippi! I’m excited for tonight’s science LiVE
Hi from Mississippi! So excited for science live tonight!
Hi from MA
Ready for tonight’s video! Koa
WOOOOO FIRST TIME WATCHING this live
Hi, from georgia
Hello from Southern Missouri!
Tuning in from from Rockwood Tennessee!
I’ super stoked to hear what is for today!
Thank you for teaching me cool new things!!
hello from kansas
It’s Aurora from NC! LOVE the technology spotlight of the day! it’s informative but SO FUN!
finally I’m live
hello
So excited for science live tonight!
Glad to be home to watch it live today. NC
Hey from North Carolina
Hi, Gabe From VA
Hello from Savannah.
hello from ga
hello!
hi
I can’t wait!!!
Hello Sci Live. Jace from FL
Esdee watching from Nevada!
Hii from kendra, so excited for tonights live!
Hello, Alys in MN!!!
Hello from Delaware. Excited for tonights science live
Hello I’m from Texas!
Hello from Alaska.
Hi from Alaska!
Hey from Malone NY, who is everyones day going
Science Live again!! Yay! Hi from Arizona!!
Hey! Science live! Whoop! P.S. Cool name!
(from the crazy 12yr old girl in Tennessee!)
Excited for Science Live!!!!
Hello from Tennessee
Hi from SC! ☺️
Thank you for teaching me new things!
Here!
2026 already or MMXXVI
hi from California San Diego
Hi from Georgia!!
Happy to watch!!
I love seeing things on EMS workers, I want to be a paramedic when I get older.
Hi from TX! 🙂
Excited for the lesson!!
Hello!
Thank you Mr. Billings for the daily knowledge! I look forward to your next installment of Science Live.
Here!!
Hi from Kentucky!!
Hello