How does an analog oscilloscope work 

lmao same, he may have a heavy accent, but i have learned soo much from him

DiodeGoneWild make a video about fake chinese usb drive (usb killer)

I think that fake drives and USB killers are two completely different things :).

Yeah i know but can you make a usb killer video?

Oskar Polanski that would be cool

I didn't see a well!

In the next video I plan to get to the dual trace modes :). I like how simple to use this scope is and yet so handy. The cat was very heplful this time.

It would be awesome to watch if you can build a crude analog scope from scratch.

You can use an old CRT TV as a basic scope. Connect the deflection coils to a good audio amplifier and you can see the signal.

The Russians have built some really nice scopes back in the 70's and 80s... interestingly I had the chance to use this very same model back in the early 80's. By the way here's a crude scope built around an old TV "HACKED!: CRT TV becomes a crude Oscilloscope" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aScAZReGQc0.html

Thanks :)

Your welcome, I'm hoping to see more of your videos that includes a teardown of a chinese electronic equipment again. And lit them to fire! And probably kill the fire with your -bottle of Žatec- fire extinguisher. :P

It's her, not him :).

:o

I like analog scopes more than the digital ones. For me, it's the only real scope. A trained eye can identify a lot of things on the CRT, which you dont see on LCD. The brightness tells you how much time the beam spent there, you can see tiny changes, it's not pixelized and in discrete steps. And maybe the CRT warms up faster than the digital ones boot :). And an analog scope never tells you that you can't use features you didn't pay for :D. Let alone the possible timers counting down the time to failure. And turning a knob is much faster than clicking through loads of stupid menus.

My Hameg scope needs about 10 min. to warm up for the trigger to work properly ;-) I see your point and i like the analog scopes for that as well. But a good DSO is no comparision to the analogue divices when it comes to logic boards, microprocessors and things like that when you need a bit of math on the signals. There is a good review on eevblog concerning about the discrete steps on the DSOs compared to the analog ones. It turns out, that they cover the noise much more detailed which the analog scope doesnt measure accurate and fast enough.

The scope works really well and I really like it. I'm not sure I'm gonna poke in it :). It's not like the Ebay items you can order another when you break one. :D

..... but maybe if I manage to get a simmilar one that's not working, I can try to repair it and show you the internals ;)

Opening a scope won't break it. Just open the case and try not to break any cables. I have two oscilloscopes. C1-107(5MHz single) from 1992(so technically it's not USSR, it has no CCCP mark on it) and Schlumberger 5228(triple 250MHz). C1-107 still has germanium transistors in it( I saw one in deflection circuitry). It has integrated multimeter which is done entirely using discrete IC's. Character generator,ADC etc is all made using TTL + analog circuitry. Russian design is messy as always. Oscilloscope part works but the multimeter is semi-broken. Finding the schematic for the oscilloscope should make it easier for you, C1-118 is a popular model so it will be easily available (I found few on Polish forums). As last advice, remember that USSR scopes have slightly different BNC connectors than the west, modern probes will fit very tighly. Changing the BNC is a popular mod for USSR scopes.

hello, here's my diy scope with 5LO38I. danyk.cz/osc_en.html The cathode voltage is a few tens of volts higher than the grid1 voltage (the grid1 is slightly negative in respect to the cathode). The more negative the grid1 is, the lower the brightness. A potentiometer is used to set the brightness. It's possible to connect grid1 to 0V and use the potentiometer to regulate the cathode voltage. Then there's a focusing electrode with a positive few hundred volts in respect to the cathode. Use another potentiometer to set the focus. Then there's the main anode, which in case of 5LO38I is 1000V nominal. The datasheet allows 500 - 1100V. The voltage of the deflection plates should be close to the voltage of the main anode. This is why the cathode and grid1 is often connected to a high negative voltage, instead of connecting the anode to a high positive voltage. This way, the deflection plate driving citcuitry is not at a high potential. Here's a schematic of an old tube oscilloscope: danyk.cz/bm370_en.html To have an idea how it all may look. The 7QR20 CRT cathode is connected to about -340V and the anode to about +230V. This is more convenient than having +570V at the anode and the plates, but the voltage between the cathode and anode is the same. The plates deflect the beam - the beam is attracted to the more positive plate. The blanking of the beam is done by raising the voltage of the cathode or by lowering the voltage of the grid1.

thank you for the very usefull help danyk! Your diy oscilloscope was the main reason i bought the 5lo38i myself and now im on seek for an oscilloscope schematic for general basic use. I cant implement your design because its difficult to find cheap tubes in greece. However i have studied your schematic and have tested the power section to the grids succesfully. I saw the beam on my 5lo38i on the center without using any deflection except that as already told you focus was not working properly. I wanted to ask you on your schematic you mention a component ''dt UZAP 100-120V''. what exactly is this. google translate didn't help at all.

It's a Tektronix clone, you probably saw the real one

You don't have to buy a new expensive scope. You can buy an older one for a good price.

DiodeGoneWild I'm poor and disabled I have to save up for even an older scope. I spend a lot of time on eBay searching for the scope I can afford.

Mike oliver those electronic scopes (DSO138, DSO Shell and the like) aren't bad for very little money. They usually come as kits, so there's a bit of soldering involved. Obviously not as good as a "proper" scope, though.

I'm in the same boat as you are Mike, but I have heard of going to Ham Radio sales & or swap meets & you can get things for like $5.00 and such for different items, which of coarse need a lot of TLC but I've seen some real nice equipment purchased cheap & they still worked. Just need to replace all the Caps, unless done recently with no questions asked about those, but all in all they are still great deals. Now if we can just find where they have these meetings we can hopefully score some nice testing equipment. Good luck Mike.

Thomas Fanning if I ever find it necessary of those magic swap meets I will let you know.

I actually plan to open one of my CRT TV's ;).

find a sony crt they work unlike any other crt.

Waiting Eagerly Sir Please

I think it's possible to buy various analog scopes on the internet....

DiodeGoneWild BUT I WANT THIS ONE !!!!

You still have till March 16 to try and win a scope from Keysight. So do a google search for 'Keysight Wave' and good luck.

banjax66 lol 😂

The web address to try to win a Keysight scope is www.wavekeysight.com

If you store the lager for so long that all of the water dries out, maybe then you can use it as a powder extinguisher or CO2 extinguisher :D.

Hypothetically it can be done ad hoc by opening the container and evaporating its contents atop the fire. The evaporation also consumes energy which is likely to have a fire reducing effect.

Better to drink the beer then piss on the fire! :)

there are projects out there. the problem with audio jack is that its ac coupling only (kills the dc part) so you cant meassure some stuff.

sure, go get one.

Sometime I may show my DIY tube oscilloscope and maybe also some factory made tube oscilloscope ;).

Unfortunately there's no X input. There's also no Z input, so it's also not possible to display analog video on it. But for waveform measurements it's quite handy. It's quite small for an analog scope and yet it has two channels.

There's also a C1-112 version with 1 channel and a built in multimeter. Or small C1-94 in a vertical box. I know russian, I read russian datasheets in original.

One with cheese?

I'm from the Czech Republic.

DiodeGoneWild wow very nice :) we are almost neighbours. Greetings from Romania :)

C1-118 is a 10MHz scope. There's also a C1-118A version up to 20MHz.

There's a chance I can get another, very simmilar, but single-channel and not working. Then I would show the internals and possibly make a video about its repair....

But no reason to go poking anything, just open so we can have a look. I should make a video about some of my old scopes, but nothing russian in my collection.

Yes, the probe GND is connected with PE. I'm not sure why the scope is built like this....

Pretty much always like this...

Battery powered items are safe to test with a scope. All mains powered items under test, should be powered via a mains isolation transformer.

You could also use isolation probes on the scope but these are VERY expensive. So much cheaper to use a mains isolation transformer.

And can we see the internals of that feline?

What no!!! D:

Střed je +

díky (y)

Made in Lithuania. And yes, still works

Me Too

Ty Tesly BM-5xx jsou legenda, taky sem o nějakym uvažoval, ale jsou to šílený kolosy. Tyhle sovětský C1-xxx jsou mnohem menší a na většinu věcí stačej... Ale jasně, BM-566A má o dost větší šířku pásma :).

Jinak tvoje videa super jen pokračuj :-)

maybe I'll get one more (non-working) and I will try to repair it in a video...

DiodeGoneWild and ur cat

There's far too many cat videos already :). I managed to fix the right BNC, so I could connect a probe to it (if I manage to find some).

DiodeGoneWild check here: www.ebay.de/itm/P4100-P6100-100MHz-Test-Porbe-High-Voltage-for-Oscilloscope-2KV-Alligator-Clip-/401498772448?var=&hash=item9c4584c343

He's from the Czech Republic.

Tony Walton huh thanks

I'm from the Czech Republic. A lot of soviet things used to be imported to my country back then...

DiodeGoneWild I see that explains everything well in greece some of your products get imported here they're cheap to us but I have to say you Czech people make good cereals for breakfast

John Arabidis soooo Soylent Cereal is Czech people?

Joseph Nicholas I kind of doubt that this exists in particular in combination with "cheap".

Yes :)

Transformator 220V WTF?

nic. kurwa nic xD

Oskar Polanski yeah like Jerobeam Fenderson’s music EDIT: search Jerobeam Fenderson on youtube

Это кошка ... ее зовут Veritáska.

DiodeGoneWild Красивая !

Czech :)