MorRobots Not even after his most recent video? I do woodworking and electronics and I feel the processes in designing something, selecting the materials/components and building stuff up (and fixing problems along the way) are very similar. It's funny how a few of my favorite youtuber's always appear in each other's channels, like John, Matthias Wandel, Ben from Applied Science, mike's electric stuff, AvE or even seemingly totally unrelated guys like Bruce from RCModelReviews. They are all people where the videos still feel like they want to be doing them instead of being "forced" to make one every week, because youtube is their job.
"because I'm a man of action...." - that made me (literally) snort so hard, it hurt! you're a legand, man :) top quality video presentation - as always ;) thanks (again) for the brainfood and for posting
Still waiting for part 4 of this series and the promised vacuum tube tester. So much has happened and changed for you in those last 6 years - any chance of picking up this project again?
Maybe your best video yet. Thank you. If you cut the old passive components with reasonable leads left, I bet you could sell them in a batch on eBay. If those were wire wound resistors, I would bid. I find using a simple buy it now price works well. I believe that thermionic spark discharge was a huge problem with early rocket motor work. The plasma from the torch slips through the visible hole in the plate. Patrion is a great way to get support with lower fees and hassle. Dave Jones at EEVBlog might walk you through it. Do you know the name of the torch? Looks very stable and tunable O2 content. This could have been at least 4 x 20 min. videos. Maybe save your energy and make them shorter. Basically, we love your work. I doubt if anyone will complain about shorter episodes.
Lawrence Bosse Thanks for the input man. I'm thinking about the patrion idea at the moment. Many youtubers seem to use it. Concerning my videos: I'm really bad at guessing how much work a project will take and I always want to cover way more than is possible. It's a learning process. The name of the gas torch is "Lötmeister 2000" by "CFH". I bought it in a home improvement store a couple of years ago. It's a cheap yet reliable tool. Here is a link: (It's in German though): www.amazon.de/CFH-L%C3%B6tlampe-L%C3%B6tmeister-2000-52165/dp/B001ANGR0I
Very nice work Sir. he level of detail that you go into with great care is wonderful. I also enjoy doing similar work because I too am an "Old School" technologist. Thank you for sharing.
Ich hab vor 6 monaten eine ausbildung als IT Systemelektroniker angefangen und lerne gerade die grundlagen der HF und BK technik. Ich war schon immer technikbegeistert und in diesem thema auch sehr wissbegierig. Deine videos sind echt ganz hilfreich zum verständnis :)
I could be wrong but it seems to me that you were much closer to verifying classic thermionic emission in your first attempt. If you were to insert a sufficient series resistance between your cascade multiplier source and the anode plate you could have stopped the arcing and also measured the voltage divider drop due to thermionic conduction at the red hot cathode temperature, which would be a more convincing test to me. The measurements you took using the amplifier seemed to correlate increases in plate current with the ionic plasma conductivity of the torch flame rather than cathode heating. I say this because the meter deflections occured so quickly with the application of flame and did not decay slowly enough to indicate thermal behavior.
Iam D Thank you a lot for the donation. Your suport is very much appreciated. Do you have any preference concerning the "two candidates" for the teardown ?
Steve Smith I have an old book with a lot of diagrams for analogue remote control circuits. Maybe I will put one of those inside the enclosure. I've been planing something like that for years.
Bist du sicher, dass nicht ein großer Teil des Stroms auf Grund der ionisierten Moleküle in der Flamme zustande kommt? Die Nadel schlägt manchmal ganz schön aus, wenn grade mal die "Abgase" vorbei zischen und noch nichts erhitzt ist. (Nachdem ein Teil aber auch von der Polarität der beheizten Platte abhängt kann's aber natürlich nicht nur das sein)
superdau Tja wir kommen hier in den Bereich, wo es wirklich schwierig wird zu sagen, was die Effekte sind, die wir beobachten. Alles was wir als Erklärung herbeiziehen können ist letztendlich nur Spekulation, solange es durch keinen experimentellen Beweis belegt wird. Folgendes zu diesem Experiment:1.) Der Edison-Guthrie-Effekt wurde von Frederick Guthrie unter sehr ähnlichen Umständen entdeckt. er hielt schlichtweg einen geerdeten glühenden Draht in die Nähe eines Elektroskops und beobachtete eine Entladung des Elektroskops. Das "Experiment" ereignete sich durch einen Zufall. Es geschah in der gewöhnlichen Umgebungsluft ohne, dass ein Vakuum erzeugt wurde. Es muss also möglich sein, denn Effekt der Glühemission ohne die Erzeugung eines Vakuums nachzuweisen und das ist das, was ich hier versucht habe. 2.) Die Elektroden am Ende des Videos sind bereits auf mehrere hundert Grad aufgeheizt, da das Experiment schon seit ca. 30 Minuten vor sich ging. (das sieht man nur im Video nicht) Sie sind also nicht auf Raumtemperatur, wie man meinen könnte. Ich gebe dir allerdings dennoch Recht, dass der entstehende Strom auf mehrere Effekte zurückzuführen seien muss. Die schlagartigen Stromspitzen sind höchstwahrscheinlich nicht auf die Glühemission zurückzuführen, sondern, so wie du sagst auf ionisiertes Gas. Es ist jedoch so, dass der "Gleichanteil" des gemessenen Stroms bei längerer konsequenter Aufheizung der Elektroden ebenfalls zunimmt. Am Ende weiß ich nicht genau, wie groß der Anteil welches Effekts ist. Es ist aber wirklich schwer, ohne großen Aufwand hier eine Differenzierung zu erreichen. 3.)Am Ende ist das nicht schlimm, da ich in dieser Videoreihe gerne sowohl, über Glühemission(Elektronenröhren mit Vakuum), als auch über Gasentladungen (Tyhratrons, Heißkathodenröhren etc. ) sprechen möchte. Vielleicht ist mir kein echter Nachweis der Glühemission gelungen, aber ich denke es wird ausreichen um im nächsten Teil die Effekte auf theoretischer Eben zu erklären, die für das Verständnis der Röhrentechnologien nötig sind.
Thanks for another great video! I noticed that the frequency standard had a marking that said "kHz". (kilohertz) While I believe that the term dates back to the early sixties, I don't think it was used much until the early 1970's. Maybe it was replaced after the unit was manufactured?
SMB Hm. I wondered about that myself. One would expect a rating in Megahertz instead. Do you know the manufacturer "QK". I'm quiet sure it's not a German company. The two other crystals are of the same brand, yet they have a rating in MHz.
Wouldn't it be nice if you would insert a grid electrode in the middle and apply the high voltage between the grid and the cathode? You could control the current through the main electrodes by applying another lower voltage to them, right? I really looked forward to this video, and of course, it was perfect. Please keep them coming.
Dren Imeraj Hey. What I have made is a very rudimentary "Diode". If one would add a grid, we would have a crude "Triode" and I will talk about the evolution of the vacuum tube in the next videos. I don't think though, that I will do further experiments with this dangerous setup. By the way: Thanks for the donation! Do you have any preference concerning the two devices that I have shown for a possible teardown in the next part ?
The Post Apocalyptic Inventor That is great, I can't wait for the new videos. I agree about the dangers of using your setup. That capacitor bank can deliver large amounts of current and a shock from it could be lethal. I'm sorry for donating such a small amount, but the living standard in my country is nowhere compared to Germany. As for the teardown, I really can't decide. I love vintage electronics and would like to see them both torn apart. But I'm a bit more interested in the tape recorder since I'm curious about the mechanical side as well.
Steve Smith The tape recorder is repairable, but I have bought 3 of them in the last years and they are worth next to nothing when you actually want to sell them. In Germany there are plenty of those on ebay every week or so. Furthermore you can build a small funky looking tube amp from its parts. The oscilloscope is working, but has issues with the trigger circuit. It also is a very slow oscilloscope (100 kHz max ) and is virtually useless for me. But I'm thinking about not gutting for parts, but rather install it inside a transparent case and make it some kind of showpiece.
I've re-used old meters like those before, too. The way I like to approach it is to connect it in series with my resistor decade box. I set it to its highest resistance (19.999999MOhms), hook it up to a small, common supply of DC voltage, and slowly step down the resistance until I have the displayed value I want.
In your ingenious experiment to demonstrate thermionic emission by heating the cathode with a blowtorch, the reason the current flow was so small was because of the air. If you enclosed the apparatus in a vacuum chamber and evacuated the air, the current flow would have been much greater even with a plate voltage of just a few hundred volts. (Of course, you would have to heat the cathode electrically since a blowtorch wouldn't work in a vacuum.) You would then have constructed a "Fleming Valve" as John Ambrose Fleming did in 1904 and could demonstrate its diode action. (The profound effect that you alluded to in your video) If you coated the cathode with barium oxide or strontium oxide, the emissions would be much greater still... You could then put a grid of fine wire between the cathode and the plate creating a crude triode as Lee De Forest did in 1906 and demonstrate that a small swing in voltage on the grid causes a much larger swing in the plate current. How good are you at glass blowing? Or, you just sacrifice a tube by disassembling it on camera. Although vacuum tube electronics are largely obsolete, it is still a brilliant and clever technology with a fascinating history. As a child, many of my first experiments in electronics were with vacuum tubes. I can't wait to see your next video!
SMB Hey. That's exactly what the next video will be about. As the story goes, Frederick Guthrie accidentally found the effect of thermionic emission, by holding a glowing piece of wire close to an electroscope. The electroscope discharged and he could thus deduce, that A current must have flown through the air between the wire and the electroscope. When I read the story I wondered if I could find a way the show the effect without creating the vacuum as well. It seemed very unlikely to me, that Guthrie could have found the effect without creating a vacuum. My idea was then to simply try that myself. Since I don't own an electroscope, I deviced another way of demonstrating the effect. In the next part I will then talk about exactly those points you just made: Why does it work much better in a vacuum, what is a diode, how becomes a diode a triode etc...
Hello, may I ask where you got all of your knowledge from? I really like you German people. I think you guys are great at engineering and designing things. I also like your cars (Audi, BMW, Mercedes). ;) Thanks in advance. Devin
150rbaby I recommend to buy old electronics books from the 50s, 60s and 70s. Back then technology was simpler and learning the basics of electronics was key. These books are often well illustrated and cheap in price. Every modern student or hobbyist should spend some years learning about basic electronics, before going into micro-controllers and FPGAs. If you do it that way you are forced to learn how electronics really works on the "component level". It is then also key to bring your theoretical knowledge to the test all the time. Reading, experimenting and calculating should go hand in hand. I learned to calculate and to think like an engineer at university, but 90 percent of what you see in the videos is self taught by reading books and putting things to the test in experiments and practical projects. Using the internet additionally is of course a part of it as well. But I do not recommend to rely on that alone.
Guten tag, The items you were calling crystal oscillators are piezoelectric crystals called HC 6's They are used in oscillator circuits. Nice collection of silver plated metal and wires.. 73 de WA4AOS
wa4aos Hello. Thanks for the info about the name of these sockets, wasn't aware they are called "HC 6". Strictly speaking a "crystal oscillator" is an oscillator circuit based on a piezoelectric crystal, rather than the crystal itself. I'm aware that today there are also integrated crystal oscillators in small metal cans available. So I guess I wasn't precise enough here. but I have heard many people use the two terms interchangeably. Best regards, TPAI
I would have thought that a crystal from the early sixties would be rated in KC or MC (kilocycles or megacycles) instead of kHz or mHz. I've never heard of the brand "QK"...
SMB Hello. There is actually a wikipedia-article about this topic: en.wikipedia.org/wiki/Cycle_per_second It says that and I quote: "in 1960, the cycle per second was officially replaced by the hertz" It is also worth mentioning, that details like these are different in Germany. I'm not sure if "cycles per second" was ever common in Germany. I heard that unit the first time in my life, when I was watching old training films of the US armed forces a couple of years ago. In the end it doesn't matter, it's just another name for 1/s or s^-1.
The Post Apocalyptic Inventor I guess because Heinrich Hertz was German, the term was always used in Germany before being adopted worldwide. In the United States, the term "cycle-per-second" or simply "cycle" (per-second was implied) was used before being replaced with the now standard term "Hertz". (Hz) This happened by about the early 1970's. Vintage radio equipment manufactured in the US before about 1970 usually says "KC" or "MC" on the tuning dial. (kilocycles or megacycles)
Hi there, nice to see your videos once again. you may have heard of Eric Dollard, US based Electrical Engineer. I wanted to let you know, if you want income source then maybe you could sell any vintage equipment or spares you have to help him with his cause. he has a website and youtube channel so i suppose you could get in touch with him if he needs anything.
...but, since I'm not lazy... :)
Another wonderfully educational video!
John Heisz Yeah I know, "pattin' myself on the back" ...I needed it after all the work :D
John, I didn't know you where also an electronics nerd!
MorRobots
Not even after his most recent video? I do woodworking and electronics and I feel the processes in designing something, selecting the materials/components and building stuff up (and fixing problems along the way) are very similar.
It's funny how a few of my favorite youtuber's always appear in each other's channels, like John, Matthias Wandel, Ben from Applied Science, mike's electric stuff, AvE or even seemingly totally unrelated guys like Bruce from RCModelReviews. They are all people where the videos still feel like they want to be doing them instead of being "forced" to make one every week, because youtube is their job.
superdau Lol, you have the same favorite youtuber's than me !
"because I'm a man of action...." - that made me (literally) snort so hard, it hurt! you're a legand, man :)
top quality video presentation - as always ;) thanks (again) for the brainfood and for posting
Still waiting for part 4 of this series and the promised vacuum tube tester. So much has happened and changed for you in those last 6 years - any chance of picking up this project again?
What a beautiful piece of electromechanical engineering. Thanks for the meter calculations too.
Wow what an absolute mega haul of vintage components!!
I do look forward to your videos. They always contain so much info and then info on info. Thank you.
Maybe your best video yet. Thank you.
If you cut the old passive components with reasonable leads left, I bet you could sell them in a batch on eBay. If those were wire wound resistors, I would bid. I find using a simple buy it now price works well.
I believe that thermionic spark discharge was a huge problem with early rocket motor work. The plasma from the torch slips through the visible hole in the plate.
Patrion is a great way to get support with lower fees and hassle. Dave Jones at EEVBlog might walk you through it.
Do you know the name of the torch? Looks very stable and tunable O2 content.
This could have been at least 4 x 20 min. videos. Maybe save your energy and make them shorter. Basically, we love your work. I doubt if anyone will complain about shorter episodes.
Lawrence Bosse Thanks for the input man. I'm thinking about the patrion idea at the moment. Many youtubers seem to use it. Concerning my videos: I'm really bad at guessing how much work a project will take and I always want to cover way more than is possible. It's a learning process. The name of the gas torch is "Lötmeister 2000" by "CFH".
I bought it in a home improvement store a couple of years ago. It's a cheap yet reliable tool. Here is a link: (It's in German though):
www.amazon.de/CFH-L%C3%B6tlampe-L%C3%B6tmeister-2000-52165/dp/B001ANGR0I
Very nice work Sir. he level of detail that you go into with great care is wonderful. I also enjoy doing similar work because I too am an "Old School" technologist. Thank you for sharing.
Cool video, really love the old tubes. I vote for the Oscilloscope, keeping inline with thermionic emission.
Nice repairable quality with the sockets being bolted not riveted! Lots of high-quality parts!
Ich hab vor 6 monaten eine ausbildung als IT Systemelektroniker angefangen und lerne gerade die grundlagen der HF und BK technik. Ich war schon immer technikbegeistert und in diesem thema auch sehr wissbegierig. Deine videos sind echt ganz hilfreich zum verständnis :)
muh1h1 Gern geschehen :)
I guess no more videos on this series??
You inspire me to stop being lazy. Excellent lessons
Beautiful construction.
Excellent video. I was looking for such a video .
Is it possible to demonstrate photoelectric current without vacuum ?
What amazing build quality. It must have cost an "arm and a leg"! WOW.
Very cool experiment !
wonderful thanks for your work
I could be wrong but it seems to me that you were much closer to verifying classic thermionic emission in your first attempt. If you were to insert a sufficient series resistance between your cascade multiplier source and the anode plate you could have stopped the arcing and also measured the voltage divider drop due to thermionic conduction at the red hot cathode temperature, which would be a more convincing test to me. The measurements you took using the amplifier seemed to correlate increases in plate current with the ionic plasma conductivity of the torch flame rather than cathode heating. I say this because the meter deflections occured so quickly with the application of flame and did not decay slowly enough to indicate thermal behavior.
Great work. donation on the way. Hope more donate, your videos are fantastic. :)
Iam D Thank you a lot for the donation. Your suport is very much appreciated. Do you have any preference concerning the "two candidates" for the teardown ?
Oscope teardown looks like fun. :)
Iam D Ok. Your vote is noted.
What will you do with the unused silver plated enclosures ?
Steve Smith I have an old book with a lot of diagrams for analogue remote control circuits. Maybe I will put one of those inside the enclosure. I've been planing something like that for years.
Bist du sicher, dass nicht ein großer Teil des Stroms auf Grund der ionisierten Moleküle in der Flamme zustande kommt? Die Nadel schlägt manchmal ganz schön aus, wenn grade mal die "Abgase" vorbei zischen und noch nichts erhitzt ist.
(Nachdem ein Teil aber auch von der Polarität der beheizten Platte abhängt kann's aber natürlich nicht nur das sein)
superdau Tja wir kommen hier in den Bereich, wo es wirklich schwierig wird zu sagen, was die Effekte sind, die wir beobachten. Alles was wir als Erklärung herbeiziehen können ist letztendlich nur Spekulation, solange es durch keinen experimentellen Beweis belegt wird.
Folgendes zu diesem Experiment:1.) Der Edison-Guthrie-Effekt wurde von Frederick Guthrie unter sehr ähnlichen Umständen entdeckt. er hielt schlichtweg einen geerdeten glühenden Draht in die Nähe eines Elektroskops und beobachtete eine Entladung des Elektroskops. Das "Experiment" ereignete sich durch einen Zufall. Es geschah in der gewöhnlichen Umgebungsluft ohne, dass ein Vakuum erzeugt wurde.
Es muss also möglich sein, denn Effekt der Glühemission ohne die Erzeugung eines Vakuums nachzuweisen und das ist das, was ich hier versucht habe.
2.) Die Elektroden am Ende des Videos sind bereits auf mehrere hundert Grad aufgeheizt, da das Experiment schon seit ca. 30 Minuten vor sich ging. (das sieht man nur im Video nicht) Sie sind also nicht auf Raumtemperatur, wie man meinen könnte.
Ich gebe dir allerdings dennoch Recht, dass der entstehende Strom auf mehrere Effekte zurückzuführen seien muss. Die schlagartigen Stromspitzen sind höchstwahrscheinlich nicht auf die Glühemission zurückzuführen, sondern, so wie du sagst auf ionisiertes Gas.
Es ist jedoch so, dass der "Gleichanteil" des gemessenen Stroms bei längerer konsequenter Aufheizung der Elektroden ebenfalls zunimmt.
Am Ende weiß ich nicht genau, wie groß der Anteil welches Effekts ist. Es ist aber wirklich schwer, ohne großen Aufwand hier eine Differenzierung zu erreichen.
3.)Am Ende ist das nicht schlimm, da ich in dieser Videoreihe gerne sowohl, über Glühemission(Elektronenröhren mit Vakuum), als auch über Gasentladungen (Tyhratrons, Heißkathodenröhren etc. ) sprechen möchte. Vielleicht ist mir kein echter Nachweis der Glühemission gelungen, aber ich denke es wird ausreichen um im nächsten Teil die Effekte auf theoretischer Eben zu erklären, die für das Verständnis der Röhrentechnologien nötig sind.
Thanks for another great video! I noticed that the frequency standard had a marking that said "kHz". (kilohertz) While I believe that the term dates back to the early sixties, I don't think it was used much until the early 1970's. Maybe it was replaced after the unit was manufactured?
SMB Hm. I wondered about that myself. One would expect a rating in Megahertz instead. Do you know the manufacturer "QK". I'm quiet sure it's not a German company. The two other crystals are of the same brand, yet they have a rating in MHz.
You're awesome man! Please, keep the good work :D
Wouldn't it be nice if you would insert a grid electrode in the middle and apply the high voltage between the grid and the cathode? You could control the current through the main electrodes by applying another lower voltage to them, right?
I really looked forward to this video, and of course, it was perfect. Please keep them coming.
Dren Imeraj Hey. What I have made is a very rudimentary "Diode". If one would add a grid, we would have a crude "Triode" and I will talk about the evolution of the vacuum tube in the next videos. I don't think though, that I will do further experiments with this dangerous setup.
By the way: Thanks for the donation! Do you have any preference concerning the two devices that I have shown for a possible teardown in the next part ?
The Post Apocalyptic Inventor That is great, I can't wait for the new videos. I agree about the dangers of using your setup. That capacitor bank can deliver large amounts of current and a shock from it could be lethal.
I'm sorry for donating such a small amount, but the living standard in my country is nowhere compared to Germany.
As for the teardown, I really can't decide. I love vintage electronics and would like to see them both torn apart. But I'm a bit more interested in the tape recorder since I'm curious about the mechanical side as well.
Are these units functioning or repairable ? I dig Grundig !
Steve Smith The tape recorder is repairable, but I have bought 3 of them in the last years and they are worth next to nothing when you actually want to sell them. In Germany there are plenty of those on ebay every week or so. Furthermore you can build a small funky looking tube amp from its parts.
The oscilloscope is working, but has issues with the trigger circuit. It also is a very slow oscilloscope (100 kHz max ) and is virtually useless for me.
But I'm thinking about not gutting for parts, but rather install it inside a transparent case and make it some kind of showpiece.
The Post Apocalyptic Inventor
Grundig would sell here in Australia . How much do they go for in Deutchland ?
Steve Smith Bought this unit as it is for under 10 €.
I've re-used old meters like those before, too. The way I like to approach it is to connect it in series with my resistor decade box. I set it to its highest resistance (19.999999MOhms), hook it up to a small, common supply of DC voltage, and slowly step down the resistance until I have the displayed value I want.
Donation made, keep up the good work. Thought about patrion?
Stuart Taylor Thank you very much man. Do you have any preference concerning the question which of the two devices should appear in the next video ?
No, no preference. Its all great. Vielen Dank
Stuart Taylor Ok. thanks for your trust and being such a faithful fan :)
Great Video
In your ingenious experiment to demonstrate thermionic emission by heating the cathode with a blowtorch, the reason the current flow was so small was because of the air. If you enclosed the apparatus in a vacuum chamber and evacuated the air, the current flow would have been much greater even with a plate voltage of just a few hundred volts. (Of course, you would have to heat the cathode electrically since a blowtorch wouldn't work in a vacuum.) You would then have constructed a "Fleming Valve" as John Ambrose Fleming did in 1904 and could demonstrate its diode action. (The profound effect that you alluded to in your video) If you coated the cathode with barium oxide or strontium oxide, the emissions would be much greater still...
You could then put a grid of fine wire between the cathode and the plate creating a crude triode as Lee De Forest did in 1906 and demonstrate that a small swing in voltage on the grid causes a much larger swing in the plate current. How good are you at glass blowing? Or, you just sacrifice a tube by disassembling it on camera.
Although vacuum tube electronics are largely obsolete, it is still a brilliant and clever technology with a fascinating history. As a child, many of my first experiments in electronics were with vacuum tubes. I can't wait to see your next video!
SMB Hey. That's exactly what the next video will be about. As the story goes, Frederick Guthrie accidentally found the effect of thermionic emission, by holding a glowing piece of wire close to an electroscope. The electroscope discharged and he could thus deduce, that A current must have flown through the air between the wire and the electroscope. When I read the story I wondered if I could find a way the show the effect without creating the vacuum as well. It seemed very unlikely to me, that Guthrie could have found the effect without creating a vacuum. My idea was then to simply try that myself.
Since I don't own an electroscope, I deviced another way of demonstrating the effect. In the next part I will then talk about exactly those points you just made: Why does it work much better in a vacuum, what is a diode, how becomes a diode a triode etc...
Brilliant, just brilliant!
Great video.
Thanks!
"...no, it's not a nuclear warhead..."
Get out of my head!
Hello, may I ask where you got all of your knowledge from? I really like you German people. I think you guys are great at engineering and designing things. I also like your cars (Audi, BMW, Mercedes). ;) Thanks in advance.
Devin
150rbaby I recommend to buy old electronics books from the 50s, 60s and 70s. Back then technology was simpler and learning the basics of electronics was key. These books are often well illustrated and cheap in price. Every modern student or hobbyist should spend some years learning about basic electronics, before going into micro-controllers and FPGAs. If you do it that way you are forced to learn how electronics really works on the "component level". It is then also key to bring your theoretical knowledge to the test all the time. Reading, experimenting and calculating should go hand in hand. I learned to calculate and to think like an engineer at university, but 90 percent of what you see in the videos is self taught by reading books and putting things to the test in experiments and practical projects. Using the internet additionally is of course a part of it as well. But I do not recommend to rely on that alone.
The Post Apocalyptic Inventor Thank you very much.
Guten tag,
The items you were calling crystal oscillators are piezoelectric crystals called HC 6's They are used in oscillator circuits.
Nice collection of silver plated metal and wires..
73 de WA4AOS
wa4aos Hello.
Thanks for the info about the name of these sockets, wasn't aware they are called "HC 6".
Strictly speaking a "crystal oscillator" is an oscillator circuit based on a piezoelectric crystal, rather than the crystal itself. I'm aware that today there are also integrated crystal oscillators in small metal cans available. So I guess I wasn't precise enough here. but I have heard many people use the two terms interchangeably.
Best regards,
TPAI
if you and bionerd 23 had children, they would probably be of superhuman intelligence and take over the world
I would have thought that a crystal from the early sixties would be rated in KC or MC (kilocycles or megacycles) instead of kHz or mHz. I've never heard of the brand "QK"...
SMB Hello. There is actually a wikipedia-article about this topic:
en.wikipedia.org/wiki/Cycle_per_second
It says that and I quote:
"in 1960, the cycle per second was officially replaced by the hertz"
It is also worth mentioning, that details like these are different in Germany. I'm not sure if "cycles per second" was ever common in Germany.
I heard that unit the first time in my life, when I was watching old training films of the US armed forces a couple of years ago.
In the end it doesn't matter, it's just another name for 1/s or s^-1.
The Post Apocalyptic Inventor I guess because Heinrich Hertz was German, the term was always used in Germany before being adopted worldwide. In the United States, the term "cycle-per-second" or simply "cycle" (per-second was implied) was used before being replaced with the now standard term "Hertz". (Hz) This happened by about the early 1970's. Vintage radio equipment manufactured in the US before about 1970 usually says "KC" or "MC" on the tuning dial. (kilocycles or megacycles)
megacool vid, thnx!
excellent!!!
Use a smoke detector cup and grid terminals for a super high dc impedence go, no flow type meter. Bypass and cut off the ionization part of circuit.
how cool, you sound like the guy from fail safe
And yet Edison missed the vacuum tube, that was left to Lee DeForest.
The meter should be labeled when converted.
"The next video in this series..."
Love it :-)
Hi there, nice to see your videos once again. you may have heard of Eric Dollard, US based Electrical Engineer. I wanted to let you know, if you want income source then maybe you could sell any vintage equipment or spares you have to help him with his cause. he has a website and youtube channel so i suppose you could get in touch with him if he needs anything.
high voltage fun
Du müsstest mal mit Great Scott zusammenarbeiten :)
Aerologic 777 Ich muss mir seine Sachen mal genauer anschauen. Bei der ganzen Arbeit komm ich nicht mehr dazu selber viele Videos zu gucken :D
Lo podes comentar en castellano
If you still have the 1mkh crystal oven in the cylinder I will by it from you replay on this coment and we can find a price
Germans are the best