Soviet Oscilloscopes (Made in USSR)

[iMo]

That's pretty cool. Most of that old Soviet stuff has a unique look to it, very industrial. That sort of stuff is not often seen over here.

Here is a list of several Soviet oscilloscopes found on youtube (reviews, teardowns, repairs):

LO-70   
LO-70   

OML-2     
OML-2M   

N313     

CI-1/C1-5     

C8-11     

C1-19b   

C1-??     

C1-49     
C1-49     

C1-54     

C1-55     

C1-65A   

C1-67     
C1-67     

C1-69     

C1-73     
C1-73     
C1-73     

C1-74     

C1-77     

C1-83     
C1-83     

C1-93     
C1-93     
C1-93     
C1-93     

C1-94     
C1-94     
C1-94     
C1-94     

C1-99     
C1-99     
C1-99     

C1-101   

C1-112   
C1-112A   

C1-114   

C1-117   

C1-118A   

[georgd]

I bought my N313 scope in 1980 for $500 (corrected by inflation) as a student and felt happy equally with it as with my DSOX3032A bought in 2015.
Its screen was so dim that I should to put a black PVC tube around to screen out environmental lights.

Georgd

[David Hess]

Having so many embedded videos makes loading the page difficult.

You can really see how the Soviets were cloning HP and Tektronix designs.  Tekwiki has some information on Soviet and Hungarian clones of the Tektronix 7000 mainframe oscilloscopes:

http://w140.com/tekwiki/wiki/Soviet_7000-series_clones
http://w140.com/tekwiki/wiki/TR-4658

[001]

Tekwiki has some information on Soviet and Hungarian clones of the Tektronix 7000 mainframe oscilloscopes:

Almost all soviet electronics was destroyed for gold plated details in 1990th.

[RoGeorge]

Nice!

I still have a C1-118A (last pic).  All the electronics inside are powered through a mains AC transformer, and the entire oscilloscope is galvanically isolated from the 220V AC.  It was my first scope, so I thought galvanic isolation is the norm with all the oscilloscope.

At my first job, they had a very nice and expensive Tektronix, which had its own small trolley, a big blue pouch on top for probes and cables, analog memory, digital multimeter, frequency counter and all the bells and whistles of a high end and very expensive oscilloscope (most probably it was a Tektronix 466B Analog Storage Oscilloscope, don't recall the exact model number).

But, of course, the Tektronix didn't had galvanic separation from the mains, like my little C1-118A has, and I didn't know about that. 
Go figure what happened next.

[iMo]

It looks like there were several R&D and production sites in USSR, some of them specialized on the high-ends and some on the others.
For example the C1-91/4 and C1-129 came definitely from a different USSR company than the C1-83, C1-93, C1-99, it seems..

BTW, there are still some 80ties models listed in various .ru e-shops (not cheap, however).

[David Hess]

But, of course, the Tektronix didn't had galvanic separation from the mains, like my little C1-118A has, and I didn't know about that. 
Go figure what happened next.

They certainly are galvanically isolated from neutral and hot but the Earth ground is connected to the chassis ground for safety.  Later Tektronix made a ground isolation monitor if you wanted to float the oscilloscope ground.

[iMo]

C1-91 teardown pictures (a "clone" of Tektronix 7000 series Mainframe oscilloscope).

[001]

It looks like there were several R&D and production sites in USSR, some of them specialized on the high-ends and some on the others.
For example the C1-91/4 and C1-129 came definitely from a different USSR company than the C1-83, C1-93, C1-99, it seems..

Yes. At least 9 plants made industrial test gear in USSR. And few "common" models was produced for schools and repairmans in late 1980th.

[WhichEnt2]

I don't know either it's relative to subject or not:

A book about scopemaking in Lithuania from first models to early 90's.
Russian language, intro in English and Lithuanian. Lots of photos.

https://www.dropbox.com/s/viq3enrlunhrigw/People.Years.Oscilloscopes.pdf?dl=0 1 file version
http://www.eltesta.com/resources/application-notes/index.htm 6 file version, direct links on the top

[iMo]

A book about scopemaking in Lithuania from first models to early 90's.

..page 205: С9-5 (1979) first soviet 8bit adc digital storage oscope with 100x100 pixels flat display (itron?).. 550pcs produced/sold within 6years.
My very feeling is the soviets heavily ignored the importance of Sales and Marketing departments at that time..

[WhichEnt2]

100x100 pixels flat display (itron?)

ИМГ-1 (“Атлет”)
http://www.155la3.ru/img1_02.htm

Based on ГИП-10000 neon matrix
http://www.155la3.ru/gipp10000.htm

Down in text they said that scope was too big to carry it through submarine hatch.

[schmitt trigger]

I love the old Soviet, Cold War era electronic equipment.

One of the things that fascinate me is the circuit workarounds for components unavailable to them. Some were very clever, some were very crude, but they had an unique Soviet twist to it.

[MasterT]

A book about scopemaking in Lithuania from first models to early 90's.

..page 205: С9-5 (1979) first soviet 8bit adc digital storage oscope with 100x100 pixels flat display (itron?).. 550pcs produced/sold within 6years.
My very feeling is the soviets heavily ignored the importance of Sales and Marketing departments at that time..

Sales and Marketing departments didn't exist at all. "Planned economy" also didn't need TV advertisement, actually any advertisement.
 I remember S&M showed up in 1993, when kommunism was declared RIP. 
Worked as a repair technician in metrology department at that time, have seen a lot of listed scopes from "inside" .

[iMo]

Sales and Marketing departments didn't exist at all.

They did somehow it seems - see the page 161 of the book - a young lady selling an oscope - the shot was intended for German market (based on the text there)..

[cmjones01]

I became fascinated with the wonderful world of Soviet oscilloscopes when I stumbled across a set of manuals in German for the C1-122 'universal oscilloscope' a couple of years ago. It's a re-imagining of the Tektronix 7000 series using entirely Soviet parts and techniques. A couple of months back I found an actual C1-122 with an interesting set of plugins for sale locally and couldn't resist buying it.

Seeing a Tektronix 7000 series (my main lab scope is a 7904A) and its Soviet equivalent side by side is fascinating. In some respects the Soviet one is clearly a copy of the Tek. For example, the plugin connector has the same number of ways and most of the same signals in the same places. In others, it's subtly different. Said connector is 2.5mm pitch instead of 0.1". And in yet other ways the Soviet development went in its own direction: the plugins include quite a flexible tunnel diode pulser, and the later (Я4С-100 and Я4С-101) sampling plugins have digitally-operated slideback measurements.

I'm documenting as much as I have time for on TekWiki, as well as searching for interesting plugins and accessories. A full set of probes and manuals for the Я4С-97 multimeter plugin (including temperature and high voltage/EHT) came from someone in Belarus, and I have another interesting plugin on its way from a surplus dealer in Ukraine. I'd love to find the sampling head ('stroboscopic mixer') for the sampling plugins, and the Я4С-105 'measurement unit' just to find out what it actually does. Any leads would be much appreciated.

Chris

[WhichEnt2]

Я4С-105 according to the 21 / 171 page of http://www.eltesta.com/Downloads/files/People.Years.Oscilloscopes.Parts%203.3,%203.4.pdf perform semiautomatic cursor measurements.

[schmitt trigger]

CmJones:
fascinating finds! I'm so jealous! Good for you.

It is interesting to see that the Soviets took the time to translate the instrument's legends into German. It shows they were committed to export these units.
Wonder if they made them in other languages too.

[cmjones01]

Я4С-105 according to the 21 / 171 page of http://www.eltesta.com/Downloads/files/People.Years.Oscilloscopes.Parts%203.3,%203.4.pdf perform semiautomatic cursor measurements.

Yes, that's why I'm intrigued with it. It doesn't have an input on the front panel, only a calibration signal output as far as I can see. So it must get some sort of input from the mainframe. However, in the original Tektronix mainframe design, there's no way that a vertical plugin can see the signal from the other vertical plugin or the sweep from the horizontal plugin, so any kind of automated measurement would be impossible without front-panel input (like the 7D12 has). Therefore I suspect that the C1-91/115/122 mainframes have an enhanced the plugin interface to make it more flexible. I already have some evidence for this: the pairs of sampling plugins (Я4С-95/96 and Я4С-100/101) talk to each other (sending sampling pulses) through the backplane, whereas their Tektronix equivalents have separate connectors on the sides of the plugins which contact each other separately from the backplane. I've now got plugin extenders for my C1-122 so can relatively easily have a look at what's going on on the plugin interface. The manual isn't very helpful at describing the functions of the various pins.

This is the sort of thing I find really interesting. It's not that the Soviet designers just copied Tektronix. They took the 7000 series design and ran with it, introducing various changes and improvements.

Chris

[MiroS]

>Yes. At least 9 plants made industrial test gear in USSR. And few "common" models was produced for schools ...
Yep, we avided them,  we tend to say - 'use  necessarily in a helmet and safety glasses'
This is not a joke.  CCCP devices  were well know to explode rapidly. Probably most fameous was TV set  called Rubin.

[cmjones01]

CmJones:
fascinating finds! I'm so jealous! Good for you.

I'm glad someone else is interested in this stuff! There's lots of stuff out there about Soviet 'industrial espionage', and teardowns of dead equipment, but I find it really interesting to have a working setup that's actually usable.

It is interesting to see that the Soviets took the time to translate the instrument's legends into German. It shows they were committed to export these units.
Wonder if they made them in other languages too.

I've only ever seen them in German and Russian. According to the Eltesta history these scope were designed and produced in Lithuania, but I haven't seen a trace of Lithuanian language anywhere on them. I'm in Poland and the pictures of scopes I've seen here have been in a mixture of German and Russian. My own C1-122 is in German (though with 'Made in USSR' curiously in English), the basic plugins are in German, and all the high frequency/sampling plugins are in Russian.

I've seen images of a brochure from Mashpriborintorg describing the 'universal oscilloscopes' in English, but I've never seen one labelled in English. I wonder if they exported any to the West. There seem to be a quite a few in Germany but they're likely to have come via the DDR.

Chris

[schmitt trigger]

I had forgotten about the DDR connection. That is the reason for the German language labels.

My closest to a working Soviet era piece of equipment was a Praktina 35 mm SLR camera. The body was made in the USSR, but it had a DDR Zeiss-Jena lens.

[cmjones01]

Here's a funny thing. I've just received some scrap Soviet plugin casings, having had the idea to make an adapter to allow Tek plugins to work in a Soviet mainframe. A quick eyeball told me it ought to be feasible, but now I've actually tried it with an empty Soviet plugin casing, and the fit is extraordinary: literally if you tried to design a casing to accommodate a Tek plugin, you could hardly do any better. It's a perfect snug sliding fit. Coincidence? By design? Will we ever know?

I need to make an appropriate rectangular hole in the front panel and do some wiring, clearly, but the basics are all there. Making the readout compatible is going to be the fun bit!

Chris

[iMo]

20y back I acquired this C1-99, mainly because the seller told me it is a Tek clone (which one?). I replaced the fan (extremely loud, something unbelievable..) with a silent modern one (fit perfectly) and since then it works fine with all original parts. I got 2 booklets with user's guide and schematics. Also it is using tunnel diodes, jfets, ceramic uhf power transistors, and several chips and hybrids. Made in 1986, probably in Minsk (Bielarus).
Except the 2.5mm pitch diff (common with eastern ICs packages too) mentioned above it seems the soviet BNC connectors are a little big bigger, such a modern probe or a BNC cable sometimes locks in and it is a pain to remove it off.

[cmjones01]

20y back I acquired this C1-99, mainly because the seller told me it is a Tek clone (which one?)

It doesn't look like any Tektronix model I've ever seen, but the spec seems something like a Tek 465.

Except the 2.5mm pitch diff (common with eastern ICs packages too) mentioned above it seems the soviet BNC connectors are a little big bigger, such a modern probe or a BNC cable sometimes locks in and it is a pain to remove it off.

Yes, the connectors that look like BNCs aren't actually: they're SR50-73 (СР50-73 in Cyrillic), and the corresponding plug is called SR50-74. They sort of fit BNCs but the locking pegs are a bit further from the front of the connector, so the bayonet latch either won't fasten fully or gets stuck. The plug is a slightly different size, too. I've got some cables here with SR50-74 plugs on them which look like BNCs but they won't fit actual BNC sockets without really forcing them.

There are other connectors in the SR50 series, some of which are unique Soviet ones and others which are quite close to Western ones. The SR50-262 looks convincingly like an 'N' socket, and an 'N' plug will just about fit, but the thread is different.

Chris

[schmitt trigger]

CMjones;

Coincidence? I believe it is Very unlikely.

Most likely, the Soviet designers decided to maintain Tek compatibility, such that they could install genuine Tek modules, if the need arose for whatever the reason.

[daxliniere]

Hey @imo, any chance you still have the schematics for your S1-99? (C1-99) I just got one for a bargain price and I have my doubts about the big electrolytics in the power supply being still usable (and not prone to bursting).

Thanks in advance!

By the way, my unit has an English front panel with Bull Electronics BE-2 printed on it. It does still say "C1-99" on the side and that's how I found this post.

Cheers everyone!
Dax.

[serg-el]

Technical description and diagrams for C1-99.

[cmjones01]

By the way, my unit has an English front panel with Bull Electronics BE-2 printed on it. It does still say "C1-99" on the side and that's how I found this post.

Bull Electronics! There's a name to conjure with. I wonder if it's the same company (J & N Bull) who used to advertise inside the front (or back) cover of the hobby electronics magazines advertising all sorts of surplus bargains, including their famous £1 "baker's dozen" packs. I still have some components bought from them, including one £1 pack which turned out to be a board from a Ferranti Pegasus computer, complete with valves.

Chris

[S. Petrukhin]

To understand why the USSR copied technology, you need to know that in the USSR there was no intellectual property. Everything that was invented was done for the benefit of humanity, not for personal enrichment. There was no competition, just a socialist contest. Soviet engineers worked for a salary, sometimes received bonuses and awards, but did not become rich. All the engineers who conquered space and created the hydrogen bomb lived a little better than the road builders.

[coppercone2]

I think the KGB made quality of life more then just a little better for critical military designers to discourage defection to the west and espionage. I think you got past alot of bureaucracy, waiting lists, etc. You were taken care of in a ill functioning system. I noticed that people that had some sort of military/government ties in the USSR and Allies always had a better outlook of how it functioned, because the 'bugs' were worked out for them in a silent manner and they were near people (g-men) that could give you the best methods of dealing with a system that many felt was hostile towards progress (what to say, who to talk to, where to file papers, mannerisms, etc).

In the free world you just need to increase spending to allow for better outcomes.

[S. Petrukhin]

Where is the free world? Do you think the modern world is free? A world dominated by hucksters? Which suggest you rather-rather eat more-more. Do you have the freedom from the fact that the new processor is about to have 128 cores and you really-really need it? You have to work hard to be sure to buy it! Otherwise, there will be no happiness in your life. Do you think it is your free choice to pursue everything new and you are not inspired by the merchants?

The communists tried to create a system higher than the struggle for survival as in the wild. Unfortunately, people in the general mass were not able to live without fear and the whip. Having the opportunity to live in peace at any level of return to society, people in the USSR worked worse and worse, did not strive for quality, did not strive for development, with rare exceptions. Only the fear of being hungry can stimulate people. Only the possibility of capturing and defending territory moves society. These are animal instincts. Socialism and communism are utopias unattainable in human society. 

[MiroS]

Socialism and communism are utopias unattainable in human society. 

Communism is not a utopia, it is a criminal system by law  and by people  experience in my country. Solidaryty movement swept it out for freedom, not for animal instinct.

To keep long story short, that CCCP utopia resulted that modern, developed in my coutry technology was prohibited by Moscow rulers, 'no' for computer faster than anything made in CCCP anytime, 'no' for public  communication infrastructure, 'no' high-tech factories, 'no' for modern cars, only alowed outdated soviet technology, produce what CCCP demands for CCCP needs - coal, steel, food ... local needs/development  completely neglected ...

[MiroS]

All the engineers who conquered space and created the hydrogen bomb lived a little better than the road builders.

Hydrogen bomb has polish-american roots. Soviet one was probly also 'copied' ...

[S. Petrukhin]

Socialism and communism are utopias unattainable in human society. 

Communism is not a utopia, it is a criminal system by law  and by people  experience in my country. Solidaryty movement swept it out for freedom, not for animal instinct.

To keep long story short, that CCCP utopia resulted that modern, developed in my coutry technology was prohibited by Moscow rulers, 'no' for computer faster than anything made in CCCP anytime, 'no' for public  communication infrastructure, 'no' high-tech factories, 'no' for modern cars, only alowed outdated soviet technology, produce what CCCP demands for CCCP needs - coal, steel, food ... local needs/development  completely neglected ...

Does anyone need food, coal, steel, and so on in the same volumes that the USSR bought? Is there much progress in free Poland now? The USSR bought up the products of the socialist camp countries in order for production to be loaded, so that people had jobs and money. Nobody needed these products, we had to use low-quality and backward products of former "friends". I remember the Polish radar at the airport, which worked steadily less often than the demonstrations took place. When it was thrown out and replaced with Czech, it became noticeably better. And there are many-many such examples. And for not being able to buy computers faster, say thank you to the United States. Let me remind you that there have always been sanctions for the USSR and the countries of the socialist camps, and among them was a ban on the sale of equipment.

Where are the most powerful technologies of free Poland and supercomputers now?  If you think less about your greatness, curse history and blame the USSR for all the troubles, if you understand that in all countries there are good and bad people, that talented engineers, for example, exist in any country, not only in Poland and in any country, it is not always easy for a talented engineer to find recognition now, you will find life easier.

[S. Petrukhin]

All the engineers who conquered space and created the hydrogen bomb lived a little better than the road builders.

Hydrogen bomb has polish-american roots. Soviet one was probly also 'copied' ...

And the bomb - of course, Russians stole from careless Americans and copied it. Moreover, finding errors and fundamentally changing the design to a completely different system of primary compression. By the way, I didn't know that Von Braun had Polish roots. I have heard that all people are descended from Ukrainians...   

And last week, backward Russians delivered astronauts to the ISS in 3 hours... This is not just to save time, this is a huge technological solution, which, by the way, has a dual purpose - it is a demonstration that our bears can shoot down any satellites with a balalaika. 

[MiroS]

Socialism and communism are utopias unattainable in human society. 

Communism is not a utopia, it is a criminal system by law  and by people  experience in my country. Solidaryty movement swept it out for freedom, not for animal instinct.

To keep long story short, that CCCP utopia resulted that modern, developed in my coutry technology was prohibited by Moscow rulers, 'no' for computer faster than anything made in CCCP anytime, 'no' for public  communication infrastructure, 'no' high-tech factories, 'no' for modern cars, only alowed outdated soviet technology, produce what CCCP demands for CCCP needs - coal, steel, food ... local needs/development  completely neglected ...

Does anyone need food, coal, steel, and so on in the same volumes that the USSR bought? Is there much progress in free Poland now? The USSR bought up the products of the socialist camp countries in order for production to be loaded, so that people had jobs and money. Nobody needed these products, we had to use low-quality and backward products of former "friends". I remember the Polish radar at the airport, which worked steadily less often than the demonstrations took place. When it was thrown out and replaced with Czech, it became noticeably better. And there are many-many such examples. And for not being able to buy computers faster, say thank you to the United States. Let me remind you that there have always been sanctions for the USSR and the countries of the socialist camps, and among them was a ban on the sale of equipment.

Where are the most powerful technologies of free Poland and supercomputers now?  If you think less about your greatness, curse history and blame the USSR for all the troubles, if you understand that in all countries there are good and bad people, that talented engineers, for example, exist in any country, not only in Poland and in any country, it is not always easy for a talented engineer to find recognition now, you will find life easier.

This is technical forum, please do not polute it with political stories.
>Does anyone need food, coal, steel, and so on in the same volumes that the USSR bought? Is there much progress in free Poland now?

I think you are lacking  infomation and I know that it is hard to accept that dark time.  To illustrate different point of view between your and our view- coal was not bought by CCCP , coal was 'taken for free' This 'exploration' was so dramatic that  even polish comunists decided to resign from german compensation which CCCP was in charge to pay to Poland , after this CCCP agreed to stop that 'free exploration'. You can imagin how big this roberry was that even comunist government  (many were KGB agents ...) tried to stop this.

For second question -  yes, progress is visible everywhere in all fields, it is amazing how fast all is progressing.

[MiroS]

All the engineers who conquered space and created the hydrogen bomb lived a little better than the road builders.

Hydrogen bomb has polish-american roots. Soviet one was probly also 'copied' ...

And the bomb - of course, Russians stole from careless Americans and copied it. Moreover, finding errors and fundamentally changing the design to a completely different system of primary compression. By the way, I didn't know that Von Braun had Polish roots. I have heard that all people are descended from Ukrainians...   

And last week, backward Russians delivered astronauts to the ISS in 3 hours... This is not just to save time, this is a huge technological solution, which, by the way, has a dual purpose - it is a demonstration that our bears can shoot down any satellites with a balalaika. 

Von Braun has no polish roots, but hydrogen bomb was not developed by him, but by two other scientists Edward Teller  and Stanislaw Ulman.

Russia and CCCP  has big contribution to space exploration, no question 
Btw we have also common scientists in that area like  polish-ukrainian-tatar-russian  Konstanty Ciolkowski.

How all this relate to CCCP scopes ? No, I will not respond for any political theread anymore, this is technical forum.

[tonyalbus]

Just Scored a C1-93     is needs a little clean 

to Compliment my almost new C1-118

[Neper]

When the USSR broke apart and the Berlin Wall came down, West Germany was flooded with surplus radio and lab equipment from the East, much of it new or rarely used, all built like the proverbial battleship. Not latest state of the art but well made and rock-solid. No comparison to the cheap stuff that came from East Asia, at the time.

I was looking for a 2 channel scope and drove to the surplus store of Helmut Singer in Aachen to have a look at what was on offer. A new Russian scope, 2 channel, 50 megs? No prob. He waved to one of his employees to grab the pallet truck and get one from the warehouse. That guy returned with an enormous wooden crate, about 3 x 3 x 3 feet, called one his colleagues to bring two crowbars and 5 minutes later the scope was heaved on to the workbench and hooked up to the mains.

Long story short, I might have tolerated the noise of the fan, obviously made by Tupolev, but what really put me off was the picture tube, supposedly by Crayola. :-)

Shortly afterwards I got myself a re-worked Philips PM3219 50 MHz analog storage scope that just recently has been replaced by a Rigol digital scope.

Having said this, I still own a number of measuring and communications equipment from the USSR and East Germany and all of that works fine to this day.

Ralf

[David Hess]

I remember reading a comment from a Soviet researcher who said, "Unless the lab equipment was made for the Soviet military, it did not work well."

[madires]

Some of the Russian and East German T&M was also sold in West Germany, often rebranded by the importer. For example, Conrad was selling a few scopes made in East Germany under their VoltCraft brand, and Völkner was offering Soviet scopes under their original names.

[Pawelr98]

I own an S1-107 portable analog oscilloscope. 5MHz bandwidth on a single channel, yet it also has XY mode, with separate X input, multimeter functionality (values displayed on the screen) and can run off 220Vac/115Vac and 27VDC.
At 27VDC it draws around 0.5A while internal DC voltage levels under typical mains operation (30+V) allow to power it directly from an 7S Li-ion battery pack.

[Chris56000]

Hi!

Can anyone tell me the part no. in Cyrillic of the 4 way Russian in–line female connector that goes in the multimeter front panel plug of the C1–112A please?

Also, has anyone got a complete (Cyrillic will do!) Technical Book for the C1–112/C1–112A oscilloscope they can scan or point me in the direction of please?

The complete books have transformer winding specs and full parts lists in them, and I could do with the parts list, etc!

I've won a c1–112 on the evilbay with a suspect mains transformer, and if I can get the whole book, rather than the circuit on it's own, I can extract the transformer info from it!

Chris Williams

[IAmBack]

Is this helpful?
https://www.kipis.ru/upload/kipis_articles/article_c1-112.pdf

[Chris56000]

Hi!

Is this helpful?
https://www.kipis.ru/upload/kipis_articles/article_c1-112.pdf

Already have a copy of that - it's the actual copy of the original Cyrillic Technical Book I'm after for the parts lists !

Chris Williams

[Chris56000]

Hi!

A helpful Member sent me a full German Manual and I found a full Cyrillic one after a few days searching on a Russian radio forum, so work on a brand–new full English Technical Manual has now been started!

The last page of the manual illustrates the two special tools that need to be manufactured for the collet knob fixings, and I attach my new drawings for them here!

First two new circuit sheets giving Block Diagrams in English also added!

Chris Williams

PS!

I missed off a link from the "Sign Trigger" block to the "Digit Unblanking Pulse Shaping" block in the second page of the "Circuit Diagram Sheets 1 and 2" attachment - I've now corrected and re-uploaded it!

[Chris56000]

Hi!

Circuit Diagram in English, Sheet 3, PCB Unit 1, Sync, Trigger, T.B. and X Amplifier for the C1-112A Oscilloscope!

Original Soviet–era circuit diagrams unfortunately do look very much like somebody has vomited all the сomonent symbols all over the page with no thought as to how to lay them out in a functional and workable manner, and I hope that my replacement diagrams fit the bill a little better in this respect!

Chris Williams

PS!

Diagram updated with minor corrections, additional notes and symbol details - please use this one for all future work!

[MegaVolt]

Ready to offer his help when working with Russian devices ))
Small translations.
Search )
Marking...

[Michael YYZ]

I have this Soviet/Russian-made school-laboratory oscilloscope which is supposed to be used as “teaching aid in high schools and radio-amateur practice”. The model is H3017 (N3017) and was manufactured in 1990. Based on a poorly translated Instructions Manual it appears to be a 100 kHz scope (amplitude non-uniformity, referenced to 1 kHz: (i) 0-100 kHz +/-30%; (ii) 100-500 kHz +/-65%). The time base and y-channel amplitude potentiometers for fine adjustments are not calibrated/graduated, so accurate voltage and frequency measurements could not be performed with this scope. Only waveform shapes can be visualized.

The text-only translated Instructions Manual makes reference to block and schematic diagrams for this scope but I don’t have the original manual in Russian. I need to get a 120-230V step-up transformer before I could test the scope to see if it still works.

Does anyone have information about this model? Or, would anyone have access to the original Instructions Manual in Russian, including the diagrams?

Thanks!

[Michael YYZ]

And a rear panel photo.

I have this Soviet/Russian-made school-laboratory oscilloscope which is supposed to be used as “teaching aid in high schools and radio-amateur practice”. The model is H3017 (N3017) and was manufactured in 1990. Based on a poorly translated Instructions Manual it appears to be a 100 kHz scope (amplitude non-uniformity, referenced to 1 kHz: (i) 0-100 kHz +/-30%; (ii) 100-500 kHz +/-65%). The time base and y-channel amplitude potentiometers for fine adjustments are not calibrated/graduated, so accurate voltage and frequency measurements could not be performed with this scope. Only waveform shapes can be visualized.

The text-only translated Instructions Manual makes reference to block and schematic diagrams for this scope but I don’t have the original manual in Russian. I need to get a 120-230V step-up transformer before I could test the scope to see if it still works.

Does anyone have information about this model? Or, would anyone have access to the original Instructions Manual in Russian, including the diagrams?

Thanks!

[Michael YYZ]

I've just had an idea and searched for this model using Cyrillic letters instead of Latin ones - "осциллограф+н3017" - and I've got results... all in Russian.  Luckily, Safari 15 might be able to do the job of translating.

I have this Soviet/Russian-made school-laboratory oscilloscope which is supposed to be used as “teaching aid in high schools and radio-amateur practice”. The model is H3017 (N3017) and was manufactured in 1990. Based on a poorly translated Instructions Manual it appears to be a 100 kHz scope (amplitude non-uniformity, referenced to 1 kHz: (i) 0-100 kHz +/-30%; (ii) 100-500 kHz +/-65%). The time base and y-channel amplitude potentiometers for fine adjustments are not calibrated/graduated, so accurate voltage and frequency measurements could not be performed with this scope. Only waveform shapes can be visualized.

The text-only translated Instructions Manual makes reference to block and schematic diagrams for this scope but I don’t have the original manual in Russian. I need to get a 120-230V step-up transformer before I could test the scope to see if it still works.

Does anyone have information about this model? Or, would anyone have access to the original Instructions Manual in Russian, including the diagrams?

Thanks!

[ilya_z]

Does anyone have information about this model? Or, would anyone have access to the original Instructions Manual in Russian, including the diagrams?

There is a neatly drawn scheme

[ELS122]

Tekwiki has some information on Soviet and Hungarian clones of the Tektronix 7000 mainframe oscilloscopes:

Almost all soviet electronics was destroyed for gold plated details in 1990th.

yeah you rarely can find any soviet test equipment, and when you do the price is sky high.
quite sad too since even the most feature-less soviet electronics are made from high quality parts and are really tough

but consumer electronics like radios, amplifiers, tape players are still very abundant since they have no gold in them, thus nobody intentionally destroys them, just have to know where to look for them.

[David Hess]

yeah you rarely can find any soviet test equipment, and when you do the price is sky high.
quite sad too since even the most feature-less soviet electronics are made from high quality parts and are really tough

but consumer electronics like radios, amplifiers, tape players are still very abundant since they have no gold in them, thus nobody intentionally destroys them, just have to know where to look for them.

I read a comment once that Soviet test equipment was not very high quality, unless it was made for the military.

[didyman]

Hi.

I have a C1-93 in a very good overall shape, but it needs a re-set on its compensation trimmer capacitor set. I need a real service manual (not the only available containing the schematic only) to how and in wich order it has to be set with what signal. Basically I know the goal and I can figure out at wich divider wich pairs should be trimmed, but an official solution would be more convenient.
Symptom is in Ch1, 1V range (and only that one, anything over and above it is OK) starts to roll off signal at around 5 kHz and goes to almost half value around 300 kHz and after it stays there. square wave is also very bad at 5 kHz. Trimming C6 cures this frequency dependent division, but of course at the expense of the squareness of more ranges.

[serg-el]

С1-93
Operating instructions and service manual.
And schematic diagrams

[didyman]

Thank You very much. Yandex can translate the pages quite good, so I can make required measurements and setting much easily. Thank You very much, serg-el.
I must tell this is a very good oscilloscope. I never met these old soviet era devices-I have a N313 but that is a very easy device. This one-I didn't expect such a well made design. Rockstable trigger, big and very good focussing screen and formidable amplifiers. I never believed such an old device can be as useable. I got it and tried it and wow. It is a very good instrument and I will make good use of it. However, some small errors have to be corrected, but it already well useable.

[didyman]

Finally I had time for the compensation network and as I suspected, there was an error there: C18 has one of its leg without connection, so that made the weird frequency dependency and bad compensation. It wasn't hard to find, but was hard to reach-fold out all parts and remove shielding was a delicate work. Finally the compensation is fine, and all measurement range is perfect as it can be. Thank You again, Serg-el.

[free_electron]

where are the digital scopes ?

[coppercone2]

nyet comrade the transistors must not be requisitioned for this purpose

[Inside21]

http://mnipi.com/catalog/oscillografy-cifrovye.html

[didyman]

And finally, my C1-93 is happy.

[onre]

I have a C1-134 with either a timebase or a horizontal deflection problem. Does anyone have the schematics for this particular model?

[MegaVolt]

I have a C1-134 with either a timebase or a horizontal deflection problem. Does anyone have the schematics for this particular model?

https://radiokot.ru/forum/viewtopic.php?f=10&t=191010

[MegaVolt]

https://www.radiokot.ru/forum/viewtopic.php?f=29&t=34065

[MegaVolt]

https://www.rlocman.ru/forum/showthread.php?t=16285

[martin1959]

Some 20 years ago I bought a soviet-era small oscilloscope for 5$ from a second-hand shop in Tashkent/Usbekistan. I asked the seller to power it up for a demonstration. The original power cable was missing, so the guy connected 220V to the 4-pin power input socket on the back of the device using the trial-and-error method.
The first attempt resulted in some smoke coming out from the back of the device, so obviously this must have been the 24-28V input foreseen for truck (or tank?) use. The second attempt worked fine, and the seller provided me with a "Dave-CAD"-like hand drawing of the power socket connection. I used the scope for 15 years or so until replacing it by a more modern device.