Russian Oscilloscope? X1-1A

[tomwalter]

I acquired this chunk of Russian test equipment recently. It is in great condition and appears to work fine but I am not really sure what it does! Does anyone recognise it or know how to translate the labels? I can work out some by their actions on the trace but it does not have any conventional oscilloscope controls such as volts per division or scan speed etc. It has a black central concentric double dial which appears to be an attenuator (dB) and a lower large slow motion drive for 0-250MHz. It was made by CCCP in 1971 and is of massive construction with double front doors. Any thoughts? Regards, Tom

[Andrewausfa]

Not a panadaptor is it? Anyway, the sentence just above the X1-1A says Measuring (a measurer of? Equipment for the measuring of?) Frequency Characteristics.

The co-ax socket to the left of the big co-ax socket with square base says 'Inspection of External Generator' which could mean External trigger input?? I'm sure a Russian speaker will come and blow me out of the water...

Andrew

[ms660]

Marker selection etc middle left?

Lawrence.

[barrymagrec]

Some sort of spectrum analyser?

[tomwalter]

Many thanks for suggestions and translations. Panadapter, frequency/spectrum analyser makes perfect sense. I would think input is via large 'BNC' (16mm!) socket to right of attenuator. I'll get the signal generator going and see what happens! Anyone got 16mm 'BNC' plug?! Some internal views attached, including some 16mm plugs! Tom

[duncanlowe]

I was thinking speccy analyser too. And I think CCCP is the overall soviet state rather than a manufacturer, except that I guess they made everything back then.

[cmjones01]

What a splendid beast. I reckon it's a wobbulator for measuring the frequency response of RF circuits, with a sweep oscillator and untuned detector.

There's some information from someone trying to fix one here:
http://www.cqham.ru/forum/showthread...4600-%D51-1%C0 (best viewed via Google Translate or similar)
and what appears to be a circuit diagram here:
https://www.qsl.net/ew1ln/x1-1a.html
and probably a technical description here:
http://www.radioscanner.ru/files/dow...ich_h1-1a.djvu

The connectors will be from the SR50 series (СР50 in Cyrillic). The ones that look like 'N' connectors are, I think, SR50-262. They will intermate with 'N' connectors, more or less. The overgrown BNC connector is probably an SR50-65, and you'll need an SR50-58, -64, or -61 plug to mate with it. There's a useful reference here:
http://www.odxc.ru/sr50
Getting hold of one may be a challenge. Soviet connectors do appear on sales sites like allegro.pl in Poland fairly regularly, and an even better selection is to be found in Ukraine - try olx.ua but you'll have to search in Cyrillic.

Or just use a crocodile clip...

Chris

[k_yller]

l soviet
oscilloscopes names started with C russian C our S
exactly C1, C7, C8
spectrum analysers started with C4 or CK4 (our S or SK)
generators with G (our G) russian G looks like F without lower bar
wobbuloscopes strated with X (russian)

it is meter of frequency characteristics from 1968 range 1-250 MHz
in russian description is something about four ports ? unfortunetelly my language skill is too low
anyway can be powered from 220V 50Hz and 115V 400Hz
max,.voltage on input (of probe ?) 250V

[karesz*]

Hi all,
its a 1-250MHz Wobulator as you can read it:
"Meter of frequency characteristics X1-1A. It is intended for the study and tuning of active and passive four-ports in the range 1-250 MHz according to the amplitude-frequency characteristic observed on the screen of the cathode-ray tube."
BTW: CCCP (SSSR)=Union of SovietSocialistRepublics(USSR)-or simpler Sovietunion...
rgds, Karl

[karesz*]

Dear Tom, here the AI-translated X1-1A secifications:

Meter of frequency characteristics X1-1A

Also this device can be called: X1 1A, X11A, kh1-1a, kh1 1a, kh11a.

Х1-1А the meter of frequency characteristics is intended for research and adjustment in laboratory or field conditions of active and passive four-poles on the device of their amplitude-frequency characteristics observed on the screen of an electron-beam tube.

Also on the site zapadpribor.com presented similar meters frequency response.

Specifications X1-1A:

The range of the middle frequencies of the device with a smooth adjustment is from 1 MHz to 250 MHz.

The permissible basic error in setting the average frequencies for a sweep band of 10 MHz on a scale is not more than ± (0.01 ∙ f ± 1.5) MHz.

The sweep band of the frequency of the output voltage produced by the device is smoothly regulated within the limits - from 0.2 MHz to 40 MHz.

An additional error in setting the average frequency on a scale from measuring the temperature for every 10 ° C of temperature measurement is no more than 0.5 of the basic error.

Allowable nonlinearity of the frequency scale X1-1A:

- with a 40 MHz swing band; 20 MHz; 10 MHz - not more than ± 15%;

- with a sweeping band of 5 MHz - no more than ± 20%.

The allowable drift of the middle frequency in the transition from the minimum sweep to the 40 MHz swing band is not more than ± 3 MHz.

The output of the device X1-1A meter ACH is designed for a cable with a wave resistance of - 75 ohms and 50 ohms.

The output of the device is equipped with a step voltage divider, allowing to attenuate the output voltage in steps of 6 dB - no more than 84 dB.

The error in the attenuation is not more than ± (0.025 ∙ А + 2 dB).

Where A is the nominal attenuation value set on the attenuator scale.

The output voltage of the device X1-1A in the pulse without an external load at the position of the divider corresponding to the maximum output is:

- at 75 ohm output in the range from 1 MHz to 200 MHz - not less than 100 mV eff;

- at 75-ohm output in the range from 200 MHz to 250 MHz - not less than 65 mV eff;

- on the 50-ohm output in the range from 1 MHz to 200 MHz - not less than 65 mV eff;

- on the 50-ohm output in the range from 200 MHz to 250 MHz - 50 mV eff.

Output voltage:

- at a frequency of 1 MHz to 3 MHz - not more than 30%;

- at a frequency of 3 MHz to 15 MHz - no more than 25%;

- at frequencies not less than 15 MHz - no more than 15%.

The permissible unevenness of the output voltage X1-1A in the 15 MHz sweep band selected in any part of the range, at the position of the output voltage divider corresponding to the maximum output is not more than 20%.

The device has scale marks in the whole frequency range through - from 1 MHz to 10 MHz.

The tags are stabilized by quartz.

The basic error in the frequency of quartz generators is not more than ± 0.1%.

Measurers X1-1A have an input for obtaining a sliding mark from an external generator.

The bandwidth of the vertical deflection amplifier is 0.7 - no less than 20 Hz to 6 kHz.

The sensitivity of the vertical deflection amplifier is not worse - 0.2 mm / mV.

The sensitivity of the device from the input of the probe is not worse - 0.07 mm / mV.

Frequency of frequency swinging is 50 ± 5 Hz.


The oscilloscope part of the X1-1A device makes it possible to observe the investigated phenomena well focused with sufficient brightness of the screen in any part of it.

The input capacitance of the probe is not more than 7 pF.

Input resistance at frequencies - 1 MHz; 50 MHz; 100 MHz; 150 MHz; 200 MHz; 250 MHz is, respectively, 20 kΩ; 15 kOhm; 10 kOhm; 5 kOhm; 2.5 kOhm; 2 kOhm.

The maximum DC voltage that can be applied to the probe input is not more than 250 V.

The device is ready for operation - no more than 15 minutes.

The thickness of the beam is 1 mm.


The average time of trouble-free operation of the device is at least 550 h.

The power consumption from the network is not more than 200 VA.


Power supply device X1-1A from the network:

- frequency - 50 ± 5 Hz; 400 ± 12 Hz;

- voltage - 220 ± 22 V; 115 ± 5.75 V;

- the content of harmonics - no more than 5%.


The overall dimensions are 516 × 255 × 407 mm.

Weight:

- no lining box and spare property - not more than 27 kg;

- with a packing box and a working set of property - not more than 47 kg.


The oscilloscope part of the instrument makes it possible to observe the phenomena under investigation well-focused at the brightness of the screen in any part of it.

Operating conditions Х1-1А:

The ambient air temperature is from -30 ° C to + 50 ° C.

Relative humidity at + 25 ° С - up to 95%.

Atmospheric pressure is 750 ± 30 mm Hg. Art.

The device is resistant to transport vibrations with acceleration - 30 m / s.

The description for the meter X1-1A was created by LLC "ZAPADPRIBOR" and added to the site zapadpribor.com. Use this material only with the written permission of the copyright holder; the link to this page is zapadpribor.com/kh1-1a-izmeritel/ required.

Regards, Karl

[tomwalter]

So, a Soviet Wobbulator it is then! I am so grateful for the response to my posting - especially Karl, Chris and k_yller, amongst others, for your skilful research and helpful details. I am not an electrical expert, indeed just a retired teacher of geography, but I have inherited a love of older electrical and mechanical devices of a higher order of construction from my parents. I am going to go over this leviathan of the ether with care and see if I can operate it as it was intended. I am very pleased to read part of the spec you kindly translated for me Karl, concerning the power supply. I have been running it from a variac for 220V as our mains supply is at 240V. I make 220 +- 22V just ok then! So, wish me luck gentlemen, let the game commence. I have line-up of hybrid HF transceivers to attend! Regards and much gratitude to you all. Tom G4KWL

[tomwalter]

Tip for translating Russian test equipment control labels:
Use http://russian.typeit.org/ to type in original (converts keyboard to Cyrillic alphabet) and then paste and copy into google translate. Works a treat.
I had ПОЛОСА КАЧАНИЯ control translate as BAND QUANTITIES. Would this be the band width of sweep generator output? This signal goes out of ВЫХОД, the 16.5mm output socket via attenuator, translated as DIVIDER and fed to filter/bandpass/IF transformer under test and resultant output fed back to input socket ВХОД. Result displayed on screen when MHz control adjusted to correct frequency - УСТАНОВКА ЧАСТОТЫ translates as Installation Frequency. Other bottom socket is for Ext generator input. Is anyone following this or have I got this all wrong?! Thanks again for all those helping me along! Tom

[tomwalter]

Main on/off toggle switch on side of chassis accessible via small trap door of case labelled ФИКСАТОР, which translates as FIXTOR?! In lower case фиксатор I get 'clamp'. Any help from a Russian speaker? Regards, Tom

[ms660]

I had a go.

The control to the left of the attenuator came out as "swing pendulum"

Maybe forum member Miguel can help.

Lawrence.

[karesz*]

Hi Tom,
you`re welcome.
Your frontplates text is -in my opinion to translate as following:
яркость----------------brilliance
смещение "Y"---------position "Y"
усиление "Y"----------gain/amplification "Y"
полярность------------polarity
метки амплитуда 1-10мгц--marker amplitude 1-10MHz (XTAL controlled)
вклучение------------cumulated(added to the line)
выклучение----------exclusion(outblanked)
полося качания-----"striping rocking" Bandwith of wobulated frequency
(correcter-tested bandwith, than you do set the center frquency by tuning)
мегагерцы------------megahertz
устяно-----------------tuning (manual)
делитель дб----------attenuator dB
вход внешнего генератора--external generator input
вход-------------------input, i.e. test sonde too
калибровка----------calibration
выход-----------------output
сеть--------------------mains _On/Off switch
анод-------------------anode (CRTs High Voltage?)
усиление "X"---------gain/amplification "X"
смещение "X"--------position "X"
фокус------------------focus
-
фиксатор--------------arreting-fixing or clamp/latch
I attached a picture, it was my reference for translation, I can not see the text by connector in left bottom corner..

For me its not clear with both mains switches, but we have to study the manual_possibly are the tubes in some "spare/lower heathing"/pre heathed? if the "side switch" is only on?_...

Have lot of pleasure with them!
Karl

[tomwalter]

Karl, Lawrence - brilliant stuff! Very many thanks.
My front panel is slightly different but nothing important. Attached picture is of my lower left. УСТАНОВКА ЧАСТОТЫ translates as INSTALLATION FREQUENCIES? Same as manual tuning I think?
The lower left connector is for an earth connection.
Now is the time for some action! I'll let you know how I get on.
Thanks again and best wishes, Tom