Soviet Oscilloscopes (Made in USSR)

[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.