Homemade Cathode Ray Tube Oscilloscope.

[sunnydayest]

interesting..

[TheRealGeriBoss]

Incredible. Now make a 50" HD TV!!!

[sonugmail]

awesome man

[fcdog555]

Hey, I am looking to build a cathode myself and I was wondering if there is a specific manual you know of. I can't find any.

[joesitter20101]

EXCELLENT! Perhaps your next project will be to replace your phosphor screen with a grounded metal object. Then aim a small Faraday cup with a positively biased collector ring at the object to attract and capture the secondary electrons it emits. That is your Z signal. Drive your defection plates with X, Y scan waveforms from a TV set. Use a sensitive electrometer current amp for the Z signal driving the Z input on a TV and you have an electron microscope . 4KeV X-ray can't exit the glass.

[Thetruthishere11]

good vid but where is the oscillosope testing some electronics.

[quaxk]

so, how do you like the x-rays? your teeth falling yet?

[nylesteiner]

@quaxk This is running on about 4 kv.  This is a low enough voltage that there is little worry about x rays.

[hardstyle905]

@quaxk Love all these kids trying to be smart about x-rays lol

Should go play with your airsoft instead.

[quaxk]

@hardstyle905 the fact that you are using a "kid" epithet to be condescending to me tells me you are in fact a teenager, I'll give you the benefit of the doubt, if you're not you should work on your emotional development, and change your attitude here if you don't want your account striked

[hardstyle905]

@quaxk I merely responded to you on the same level. What's wrong with you? You posted a stupid remark in a offensive way and so did I. Call it even shall we?

[hardstyle905]

@quaxk Damn, I just noticed you blocked me. Must have hit you really hard lol

Apparently, my emotional development is going just FINE. LOL

[quaxk]

@hardstyle905 two reasons I blocked you, first there's no way to report abusive pm's, that's a known youtube security loophole, there's very little one can do about private message harassment, since you have been hostile to me without prior contact I suspect the behavior would escalate in private, reason #2 is angry users usually come to your channel and leave unrelated nasty video/channel comments in retaliation instead of solving the argument where it started, preemption cure those issues

[hardstyle905]

@quaxk What do you do when someone "harasses" you in real life? Run to the police station? Grow a pair.

[NerdForMIT]

FUCKING AWESOME!

[CrazyScience]

Well done. I am inspired by your work. Currently tried video response, but not yet approved by you. Thanks for your your inspiring videos.

Until you approve my video response, others my see it on YouTube channel:

watch?v=psTEGGTGB3o

Thanks again.

[MSVistasucks]

Try generating an image.

[Jenfucius]

I wonder how the air was taken out of the tube????

[MissPheonix1]

sucked out? using a mechanism known as the vacuum air compressor...we tried it in school. IT was AWESOME!!

[Jenfucius]

Is there a special type that you need to get???

[MissPheonix1]

Don't have a clue : )

[OLTCITKA]

I will never stop to be amaized by the CRT technology. It is in fact a simple concept,yet so difficult to build. Thanks for posting! 5/5.

[pevargas]

Science at its best.

Congratulations.

[troynall]

kind of reminds me of that episode of star trek when kirk and spock go back in time to save/let die some women(Jane ?). anyway, spock creates some crazy shite'! BTW are your ears pointy ? LOL.... Your the real freaking Mac guyer without the duct tape !!! LOL....

[MKUltraProject]

its called Geek - Need to get laid

[laurdy]

try and do that YouScope thing on it

[carl95125]

Nyle, thx for posting...what type of vacuum pump do you have(Rotary vane pump)? I guess that you would not need anymore than that...like

a cold trap or diffusion pumps?

73,

Carl K6ZXU

[TheLightningStalker]

BTW, is that a Moog I hear?

[TheLightningStalker]

Can you offer any advice to me? It seems like when I go to heat the glass with the torch it heats just fine, but when I remove the heat, after a few seconds it cracks.  How do I avoid this? Also if I used a steel case for my tubes what is good to seal around the wires? I'm thinking I could melt some glass in there but how would I keep it from cracking due to the temperature difference beteween the glass and metal? Thank you.

[vmelkon]

@TheLightningStalker It is simple. You have to cool it slowly. I've done it often and 95% of the time, no problem. There is always a risk that it will crack a few days later due to stress in the glass.

[TheLightningStalker]

I bet this puts out quite a bit of X-Rays. They're most intense at a right angle to the anode plate.

[M0AYF]

Hi Nyle,

A very interesting video, well done. Do you think it would be possible to get a high enough vacuum for a home-made CRT using the method shown in this youtube video FqDI0lFz9Gc

I also enjoyed reading your Flame Triode webpage, what sort of maximum frequency have you been able to achieve?

73,s

Des (M0AYF)

[leet2888]

Can anyone kindly enough to answer my question.Why does it produce a green light when it hits the fluorescent screen, i know the interior of the fluorescent is made of zinc sulphide but why, how?.Thx in advance (sry still learning)

[minousoft]

CRTs emit small amounts of X-rays. That's why they use leaded glass.

[footinmouthindustrys]

thats awesome! that is one awesome homemade tube!

[juniortore]

how do you open the tube without cracking the glass?

[juniortore]

i figured that but i didn't know if you bought the powdered phosphor or got it out of the tubes. as a matter of a fact i`m 12 also and very smart obviously you are too. ok sorry to bother you but how did you get it out did you spray it out with water and let the water evaporate leaving the phosphor behind. or brush it out?

[Adrianofnagrand]

is this dangerous? hehe

[xXtortionXx]

how did you make it detect an audio signal?

[juniortore]

where did you get the phosphor?

[dnl5649]

I am 12 but i'm really smart. I make crt's I get the phosphor from flourecent lightbulbs. DUH.

[linesoffiction]

now who's a cheeky little sh*t, get your head from up your ass mate.

[teralabUK]

Or maybe not. Fluorescent lamps contain poisonous mercury. The fluorescent compound in lamps is probably not suitable anyway as it is designed to convert UV light to visible light, not electron impacts.

[teralabUK]

Sorry, this was intended to be a reply to dnl5649 but it went in the wrong place. Your CRT experiment is excellent. I have tried something similar myself, but your results are better.

[synchronous0987]

I hope you wore a respirator, there is a high concentration of mercury

[mexicanerd]

u sound like an ass hole DUH

[dnl5649]

u r a ass hole you shit fuck.

DUH....

u know if i had a huge induction heater i would cook u alive or mabe i would zap u with a magnitron from a microwave oven

[mexicanerd]

you spelled "magnetron" wrong lol

[dead666body]

that's funny as hell...

[patrickikis]

Brilliant!

[prototype9000]

homemade is the way to go even if it isnt as good as a commercial product allways more rewarding

[toomuchass]

Nice 1 want 1!

[blip789]

crikey, you,re posh!

:-}

[copper103]

lol just because people cant accept the fact that there are people cleverer than they are they feel a need to post abusive comments on videos of really cool stuff like this

[adilghanty]

tocatta and fugue in d minor

[albear972]

Damn, that is cool!

[wiiowner1996]

simply cool

[sciencectn]

Very impressive.

If you can get dual audio channel inputs, make the left channel correspond to the x position and the right channel correspond to y, and get the waveform made by tejeez which plays demo video using the oscilloscope.

[jeabo0adhd]

do it and put the video on YouTube

[amazingeek]

now run jumpin' jack flash through it and i'll be happy

[mkw1it]

Simply genial!

A question for the author of the video.What type of synthesizer has you been used for the test?

Thanks

[XMDinx]

howd do u make those

[ComradeLynx]

WAY COOL

[BolterBolter]

And you are an idiot... Sounds like a fair trade.

[ComradeLynx]

haha

[jeabo0adhd]

nerd = cooler than you

[csingcsung]

Danger X-ray is only on wery high voltage 30-100KV.

How many voltage can this tube work ?

CRT TV and monitor is higher power.

[6p1p]

The old black and white CRT very expansive now, Is it possible to build one homemade CRT for old round television? I really interested about this project..

[DrMario2007baka]

It's cool! Well, one problem is, X-ray emission... I have fooled around with X-ray light before - if the light is from other than screen - it's a definitely no-no. You can tell by looking at the glass - it glows greenish-blue light as the ionizing (X-ray) light's being absorbed into the glass..

[mickXfan]

amazing...

[newtonianbarf]

x rays!!!!

[ComradeLynx]

OHH SHIT

[karstenhain]

What were you using for a flyback xfrmr to generate the high voltage?

[elite555guardian]

nice lisajoule patterns.. did you use a function generator or did you produce your own waves? impressive

[synthmonger]

First a synthacon VCF and now this. What's next Mr.Steiner?!

[AerialTheShamen]

Has anybody ever made CRTs from beverage bottles?

It would be certainly an interesting art project to display some moving people inside (e.g. pictures of an alcoholic trapped in a booze bottle) etc. Perhaps a curved screen could be placed inside, like with early B/W Sony Watchman CRTs.

[AerialTheShamen]

Has anybody ever made CRTs from beverage bottles?

It would be certainly an interesting art project to display some moving people inside (e.g. pictures of an alcoholic trapped in a booze bottle) etc. Perhaps a curved screen could be placed inside, like with early B/W Sony Watchman CRTs.

[xXxmidgexXx]

awesome! how many microns is the vaccum?

[therealxevious]

Who is the music from the first part from?

[zebedec]

It begins with Toccata & Fugue by J.S. Bach

and then it fades over to Ludwig van Beethoven, 9th Symphony

[zebedec]

J.S. Bach - Toccata and Fugue

Ludwig van Beethoven - Symphony No. 9

[nylesteiner]

It is Bach Toccata from Toccata and Fugue. I recorded it myself.

[dibbuck]

great project - maximum respect my good fellow - even a decent music choice.

[MrFashnya]

@nylesteiner it is Bethoven's simphony #9

[rugelindinda]

Warning the phosphor may be dangerous(poisonous)

[RotogenRay]

Actually, it is definitely dangerous.

But still, this is really cool.

[AerialTheShamen]

I think that x-ray radiation is rather the primary danger than phosphors. There are compounds like zinc sulfide, those are fairly harmless. To reduce x-ray risk, avoid to use too high HV voltage. So far I remember, also imperfect vacuum reduces the x-ray risk. (When a phosphor screen outside the tube starts to glow, than there is definitely too much x-ray around you.)

[donatj]

This is great, this is the kind of project that would really interest me, but I have neither the skill nor the tools necessary.

[Gen0cide]

U R 1337

[Gomezcaline]

That's great! How did you make your phosphor screen?

[nylesteiner]

I mixed some fine phosphor powder, from a broken fluorescent light, with water and applied it to the glass surface and let it dry.

[Gomezcaline]

I'm surprised that worked as well as it did - well done!

[websuspect]

Friggengenious.  Can you get everybody loves raymond?

[digitusmaximus]

Great! I expected to see you deflecting the beam with coils, but you pleasantly surprised me by also using an electrostatic plate! Congratulation on your accomplishment.

What are you using to pump down your vacuum?

[nylesteiner]

I am using a used Robinair refrigeration service pump and 1/4" flare service hoses etc. The degree of vacuum, necessary to make these crt's operate, is not difficult to achieve. A little known fact: The mean free path distance for electrons at a given pressure is many times greater than the mean free path distance for air molecules.

I appreciate your interest and will let you know when I get this project written up.

Nyle

[digitusmaximus]

Interesting. Thanks for the info.

[digitusmaximus]

Ah, yes, if I had made it down farther into your projects on your web site, and read the "Vacuum tube operation at amateur grade vacuum" article before today, I would've known about the Robinair. :)