Products > Test Equipment
Soviet Oscilloscopes (Made in USSR)
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cmjones01:

--- Quote from: schmitt trigger on June 25, 2018, 04:15:11 pm ---CmJones:
fascinating finds! I'm so jealous! Good for you.
--- End quote ---
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.

--- Quote ---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.

--- End quote ---
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:

--- Quote from: imo on June 26, 2018, 12:03:48 pm ---20y back I acquired this C1-99, mainly because the seller told me it is a Tek clone (which one?)
--- End quote ---
It doesn't look like any Tektronix model I've ever seen, but the spec seems something like a Tek 465.

--- Quote ---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.

--- End quote ---
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
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