Hello.
I bought my first oscilloscope and that`s USSR made analog oscilloscope SAGA. My model looks similar to C1-94, but there is no clear indication what model it is, except its brand.
Problem is, I don't have probe for it, and I couldn't find one.
Maybe someone on the forums knows how to "make" such "probe" yourself, or on which pin connect probing cable?
Photo of probe socket (it was probably called DIN5 socket):
According to my measurements, pins 1 and 5 are connected to each other. Then pin 3 and little metal piece (6) are connected to each other + to ground socket on right side of front panel.
As it's my first oscilloscope and I'm not exactly sure what I'm doing, I didn't try to connect anything to it, because I don't want to blow this thing just yet.
Any help would be really appreciated.
turn it on a get a trace and stick a small wire into each of the ungrounded orifices of the input connector, you will find one that will give you a display and maybe an other one that is not so sensitive. The sensitive one is X1 and the other pins supplying power for a FET probe or vacuum tube low-cap probe.
You can then solder some test leads or banana jacks or even a BNC connector to connect to just an ordinary scope probe that supports 30pF input capacitance.
You probably need a Putin-Probe, on sale in the Crimea, you can find these in small shops in Cuba, or on USSRbay.
Don't worry, you won't burn it out playing with it, it was made to survive at least three hot or cold wars.
3 & 6 are Ground... so I would venture to say that 1 & 5 are signal input. Does it have a calibration output? Probably couldn't hurt it to try feeding that in.
Also, to add to Paul's suggestion: Put the scope on the smallest volts/division.
I connected Atmega8 generating signal to pin 1, and ground to separate socket, and its working fine.
Thanks guys.
So now I have to "make" some kind of probe and figure out how to rotate lamp a bit to the right (it is of to the left, but still usable).
Buy a probe. "Make" an adapter. Actually there is such a thing as DIN5 to BNC adapter, but I think you will be better off building your own rather than trying to find such an oddball.
In fact, here's a guy who made an adapter for the C1-94:
http://www.amateurengineer.com/?p=623
Thank you. I’ll go with building adapter, and buying a probe.
I guess, that 10 USD China-made probe will be enough for such low-end scope? I don’t need this for any high frequency measures anyway.
Many professionals , and especially
but hams good
known oscilloscope C1 -94
(Fig. 1) . The device , with its rather
decent specifications ,
has a very small size and
weight , as well as relatively low
worth. With this model CPA -
Dhu gained popularity among spe -
ists involved in mobile
repair of various electronic tech-
nicknames that do not require a very broad
baseband input signals , and
differences of the two channels for simultaneous
measurements. Currently, the ex-
pluatatsii is sufficiently
large number of oscilloscopes.
In this regard, this article pre-
assigned to specialists who
it became necessary to repair and on-the-
construction oscilloscope C1 -94 . os-
lograf has the usual devices for
block diagram of this class
(Fig. 2) . It contains a vertical channel
deviation in ( CWE) , horizontal channel
tal deviation ( CLC ) , a calibrator
torr , the electron beam with the indicator
high-voltage power supply and
low-voltage power supply .
CEP consists of a switchable
input divider , pre-
amplifier , delay lines and tip -
of the amplifier. It is designed for amplification
tion signal in the frequency range
0 ... 10 MHz to the level required for
produce a given coefficient
vertical deflection (10 mV / div ...
5 V / div in 1-2-5 sequence ) with minimum
amplitude- frequency and phase- frequency
governmental distortions.
CLC includes an amplifier syn-
synchronization , trigger synchronization
the startup , sweep generator , the scheme
mu locking and power sweep.
It is intended to provide any -
linear deflection of the beam with a given co-
coefficient sweep from 0.1 ms / div
to 50 ms / div in 1-2-5 sequence .
Calibrator generates a signal
for calibration amplitude
and time.
Node electron beam indicator
torus consists of an electron beam
tube (CRT ) , CRT and power supply circuits
illumination scheme .
Low-voltage power - designed
chen to supply all functional
device voltages 24 V and q 12 V.
Consider working on the oscilloscope
level concept (Fig. 3) .
Analyzed through the input signal
SH1 connector and push button switch
B1 -1 ( "Open / Closed entrance ") post -
Paet on input switchable Delhi -
tor elements for R3 ... R6, R11, C2, C4 ...
C8. Scheme providing input divider -
a constancy of the input impedance
regardless of the position switches
the Tell vertical sensitivity B1
(.V / DIV . "). capacitors divider
provide frequency compensation
divider in the whole band .
The output of the divider analyzed signal
nal input to preliminary
CWE amplifier ( unit U1 ) . on the field
transistor T1 -U1 collected source-
repeater for AC input
signal. DC this cascade
cad ensures symmetry Desktop
mode for subsequent amplification stages
tributor . Divider resistors R1- U1 ,
R5- U1 provides input resistance
tion amplifier equal to 1M . diode
U1 and D1- D2 zener -U1 - providing
are input overload protection .
two-stage pre-
amplifier made ??with transistors T2
Yes you can use a cheap probe. There should be some reviews or chat regarding cheap ebay probes somewhere around on this site.
Suggestion: Add a little shielding (aluminum foil or better) to your adapter when you build it.
Hello.
I bought my first oscilloscope and that`s USSR made analog oscilloscope SAGA. My model looks similar to C1-94, but there is no clear indication what model it is, except its brand.
Problem is, I don't have probe for it, and I couldn't find one.
Maybe someone on the forums knows how to "make" such "probe" yourself, or on which pin connect probing cable?
Photo of probe socket (it was probably called DIN5 socket):
According to my measurements, pins 1 and 5 are connected to each other. Then pin 3 and little metal piece (6) are connected to each other + to ground socket on right side of front panel.
As it's my first oscilloscope and I'm not exactly sure what I'm doing, I didn't try to connect anything to it, because I don't want to blow this thing just yet.
Any help would be really appreciated.
A long time ago I had a similar scope, but with an ordinary BNC connector.
I would recommend you to open the scope (nothing to be afraid of there) and check if you can fit a normal 50Ohm BNC there. The connector should have just 2 wires, one of them is connected to the scope's ground.
AFAIK this scope has 10Mhz bandwith, so that any lousy probe will do.
No, any probe will not do.
If your probe is a 10x probe there needs to be compensation adjustment calibration or the frequency response of the scope(even though it is limited to -3db at 10mHz) will show a incorrect/distorted of waveform/amplitude display of any signal component over a few hundred cycles.