Thanks for showing me this. My Grandfather was Lee deForest and I never really paid much attention to his work when I was a child. He died when I was 13
Rick, It's stunning what our ancestors invented...from absolute scratch with nothing to guide them but an idea and repeated trial and error. The internal combustion is another example. Truly mind blowing. Thanks. Regards, John
I have no clue about monetary value. I do know you are right about how much the cost on tubes have increased. When I first bought an ordinary 01A it was $19 and I thought that was awful. Now they are $60, !@&#*. So the tubes in most of my 1920s radios are worth more than the radio. Thanks.
Wow! that is extremely rare and a priceless piece of radio history! I know they had a lot of problems with patents back in the early days, Magnavox for example, got in trouble with that. that's why they have patent info all over the early tubes I think. Thanks for sharing that!
Your Grandfather's invention, the Triode Vacuum Tube, was the start of all electronics. An amazing position to hold in world history, it literally changed the world. And I still find the function of the Triode Tube fascinating. Thanks.
It was used as an AF and RF amplifiers, and a detector also. Yes the outer cylinder is the plate. The name comes from the original 1906 Audion, the plate was actually a small metal plate. The coil is the grid and in the original it was a wire bent back and forth covering about the same area as the plate. De Forest placed it between the plate and the filament. The filament is the part that emits the electrons. The filament was named by Edison. The grid was named by De Forest.
Yes, about the first big commercial tube was the triode 01A. The first ones were short pin brass base with a vacuum tip at the top. The filament was 5 volts at 1 ampere.
My Grandfather, Harry Mack Horton, worked for Lee deForest in his Wireless Radio shop and went on to invent the Airplane to ground radio and transmitting "Trailing Antenna". Grand dad Horton was a Army Air Corps Pilot and instructor and was one of the first pilots to test fly the Curtiss A-1A Hawk. Ain't history cool!
I am doing a project on Lee de Forest for National History Day. I was wondering if I could use this film from your RUclips channel. I will make sure to give you credit for providing the video.
Thanks. I must have gotten this from a friend in the Midwest many years ago, 20+. I thought I had a De Forest Audion but could not find it. Well yesterday I was looking for something and saw a Philco tube box and this was inside. I have put the Audion in a new white and labeled tube box.
Thanks John, All inventers fail a lot, actually most of the time. They keep trying things and build their progress on small successes. And then sometimes, something amazing is discovered. Regards, Rick
Rick what was the tube used for? The outer cylinder is the plate? The coil in the middle is the grid? So the vertical wire is filament and must also be the cathode?
Thanks Don, The beginning of electronics/radio is very interesting. The best documentary I have seen on the beginning of radio is by Ken Burns from the book Empire of the Air. It is terrific!! To hold a real peace of that history is amazing.
My name is Lee De Forest Marshall, my dads mothers mothers last name was De Forest, he is my blood, can anyone tell me anything interesting about him? after all, i may have reincarnated as him who knows! Perhaps i need to know my past to know my future!
My Dad, Bob Nicholson left me a HOMEBREW DEFOREST AUDION Toronto Patient 1909-1923. He & Mom went to radio shows everywhere & had a cherry collection of AK's 🙋🏽♀️🌴
When the Montgolfier brothers invented the hot air balloon, they thought the lifting principle was smoke, not hot air. That does not change the fact they invented the balloon. DeForest invented the triode tube. Armstrong provided the hot air.
This is a Class II Type A. In the video, there is a vertical ink stamp on the base stating "Class II". You actually put your thumb on it *cringe*. Inside the tube, on the press, is written in ink a "2".
Thanks for showing me this. My Grandfather was Lee deForest and I never really paid much attention to his work when I was a child. He died when I was 13
Rick,
It's stunning what our ancestors invented...from absolute scratch with nothing to guide them but an idea and repeated trial and error. The internal combustion is another example. Truly mind blowing.
Thanks.
Regards,
John
I have no clue about monetary value. I do know you are right about how much the cost on tubes have increased. When I first bought an ordinary 01A it was $19 and I thought that was awful. Now they are $60, !@&#*. So the tubes in most of my 1920s radios are worth more than the radio. Thanks.
Wow! that is extremely rare and a priceless piece of radio history! I know they had a lot of problems with patents back in the early days, Magnavox for example, got in trouble with that. that's why they have patent info all over the early tubes I think. Thanks for sharing that!
Your Grandfather's invention, the Triode Vacuum Tube, was the start of all electronics. An amazing position to hold in world history, it literally changed the world. And I still find the function of the Triode Tube fascinating. Thanks.
It was used as an AF and RF amplifiers, and a detector also. Yes the outer cylinder is the plate. The name comes from the original 1906 Audion, the plate was actually a small metal plate. The coil is the grid and in the original it was a wire bent back and forth covering about the same area as the plate. De Forest placed it between the plate and the filament. The filament is the part that emits the electrons. The filament was named by Edison. The grid was named by De Forest.
The first widely used audio tube was the French "R" valve. It is still being manufactured by KR in the Czech Republic.
Yes, about the first big commercial tube was the triode 01A. The first ones were short pin brass base with a vacuum tip at the top. The filament was 5 volts at 1 ampere.
My Grandfather, Harry Mack Horton, worked for Lee deForest in his Wireless Radio shop and went on to invent the Airplane to ground radio and transmitting "Trailing Antenna". Grand dad Horton was a Army Air Corps Pilot and instructor and was one of the first pilots to test fly the Curtiss A-1A Hawk. Ain't history cool!
Very cool
Thanks
I am doing a project on Lee de Forest for National History Day. I was wondering if I could use this film from your RUclips channel. I will make sure to give you credit for providing the video.
Sure you can use this video. I hope this video helps your project.
You may use this video if you find it useful.
Triode Tube Amplification Visual Demo
ruclips.net/video/4FkD0LRiu7A/видео.html
those are EXTREAMLY rare and almost any science museum would probarbly want one
I have one of these! Any ideas where I can sell it?
Thanks. I must have gotten this from a friend in the Midwest many years ago, 20+. I thought I had a De Forest Audion but could not find it. Well yesterday I was looking for something and saw a Philco tube box and this was inside. I have put the Audion in a new white and labeled tube box.
Thanks. I have been thinking about that. My sister works in a state museum and a very good friend's daughter works at the Smithsonian.
Thanks John,
All inventers fail a lot, actually most of the time. They keep trying things and build their progress on small successes. And then sometimes, something amazing is discovered.
Regards,
Rick
The history is really amazing too. Thanks.
Thanks Rick. Great info. Your description is spot on. I just wiki Audion and it shows it just as you described.
Want to sell it? I'm a DeForest and Grandma had one at her house. Would love to own one.
I just checked eBay and there are a number of DeForest tubes for sale.
Yes that is right. The two larger pins are for the filament. It has the same configuration as an 01A.
What a great tube thanks for sharing it with every one
Beautiful tube-a work of art but solid state was the first radio technology and we have returned to it.73s!
No the filament is open but it would not look any different if it was good. Hope to find a working one some day.
Read De Forest's story in Empire of the Air, book.
Rick what was the tube used for?
The outer cylinder is the plate?
The coil in the middle is the grid?
So the vertical wire is filament and must also be the cathode?
@nlimchua
Empire of the Air, Excellent book. And the documentary by Ken Burns based on this book is the best radio history ever made.
Thanks and good luck!
im not lying!!!!!!
@wa1ufo
I wish I would taken a picture of an all original, very early crystal set, Ed Bell had. It was large and had it's original Glass Cover.
Thanks.
Thanks Don,
The beginning of electronics/radio is very interesting. The best documentary I have seen on the beginning of radio is by Ken Burns from the book Empire of the Air. It is terrific!! To hold a real peace of that history is amazing.
So... does it still work? That would really be interesting.. Built to last? :) thanks for sharing.
My name is Lee De Forest Marshall, my dads mothers mothers last name was De Forest, he is my blood, can anyone tell me anything interesting about him? after all, i may have reincarnated as him who knows! Perhaps i need to know my past to know my future!
Today just Google “Lee De Forest” Also look up the book “Empire of the Air”
Your right there where all kinds of patent problems between companies and people too. It was very messy sometimes. Thanks.
My Dad, Bob Nicholson left me a HOMEBREW DEFOREST AUDION Toronto Patient 1909-1923. He & Mom went to radio shows everywhere & had a cherry collection of AK's 🙋🏽♀️🌴
When the Montgolfier brothers invented the hot air balloon, they thought the lifting principle was smoke, not hot air. That does not change the fact they invented the balloon.
DeForest invented the triode tube. Armstrong provided the hot air.
This is a Class II Type A. In the video, there is a vertical ink stamp on the base stating "Class II". You actually put your thumb on it *cringe*. Inside the tube, on the press, is written in ink a "2".
Class II Type A is some type of licensing, not biasing.
Thanks.