Hallo, i have three of this pankake Tubes. I hope You have the data shield.When not, i ammend the translation from russian:
Here is the translation:
ECV 6343 II652 I COUNTER SI8B
Counter Beta radiation SI8B (hereinafter counter) is used to register the soft beta-radiation in radiometric devices.
Climatic performance U3.I.
Solo 15170 Date of manufacture OKT 1990
Circuits connecting the electrodes with the findings
Designation Name of the output electrode
Basic electrical and radiometric parameters
The slope of the plateau of the counting characteristics,%, not exceeding: 0,3
Sensitivity of the counting rate, imp.s-1.A-1.kg: 1.3 * 10E12 ... 1.9 * 10E12
Sensitivity of the counting rate (imp / uR): (350 ... 500)
The slope of the voltage-current characteristics,%, not more: 1,25
Amplitude voltage pulse, V, no less than: 20
Own background, imp / s, max: 2
Effectiveness of registration of beta radiation,%: 50 ... 85
Current sensitivity, uA: 8 ... 15 (at P = 12.9 * 10E-10 A / kg (5 uR / s))
Operating range voltage, V: 360 ... 440
Maximum operating speed counting, pulses / s: 3400
Maximum operating current, uA: 18.2 !!
The maximum permissible exposure dose of gamma radiation, A / kg: 21.5 * 10E-6 (for 1 min)
The maximum permissible exposure dose of gamma radiation (R / h): (300) (for 1 min)
Precious metals are not contained.
The content of non-ferrous metals in a counter:
Nickel - 3.6 grams per 4-pin.
Counter SI8B meets specifications 0D0.339.388 TU.
At re-manufactured _________ date
I. After you remove the meter from the package carefully remove the protective cover and visually check to make sure that the counter has no express
mechanical defects (cracks of mica, chipped enamel).
The counter can be taken only at the base. Is strictly forbidden to touch mica window.
2. The inclusion of the counter is made by feeding the anode voltage 390.
3. During operation of the counter values that determine the mode of operation, should not exceed the maximum allowable value.
Doing so may lead to loss of counters performance.
Aktive aerea; Diameter 6,5 cm =
So, it ist reccomended to have an resistor on the anode of 5.1 Mohms (Mega Ohms) Some People suggest, it would better work with 22 Mega Ohms !
But the current must not exceed 18,4 micro amperes (Attention In russian they call it 18,4 mA, but this are not milli amperes, it ist micro amperes.)
So further on bring the resistor to the pankake Tube not to the power supply, because of capacity of the BNC cable !
So solder the resistor direct on the Pin 7 (Anode). The anode must be positive and the Voltage should be not more then 400 Volts.
Do not touch the micra in front.
This tube is not enrergy compensated.
Here is a description of this tube
SI-8B / CI-8b - Sort of the Russian version of the LND 7313. It seems much sturdier due to a thicker mica window. It's also about half the price. I just got this tube but it's now on the comparison charts. Here is a nice translation of the spec sheet and here is a pic of how to wire its socket. I have heard that people are using a conversion rate of 430 - 450 for this tube. I did find this tube to be light sensitive and you should also run it within the specified (narrow), voltage range - 360 - 440V. Higher voltages give suspiciously higher counts. I also found these specifications (from the manufacturer?) that have some new info.
Regarding the load resistor: The Russian spec sheet lists the max current through the tube as "18.2 mkA". This has been commonly translated as 18.2 mA. That would make the load resistor only 22kΩ at 400V. However I found this glossary which defines the Russian "mk" as "micro". This makes the load resistor 22MΩ at 400V which is more reasonable. Note that the diagram in the manufacturer specifications (linked above) show the load resistor at 5.1MΩ. However, I went with the original spec and I increased the load resistor from 5MΩ to 20MΩ. I got ~5% more counts at 20MΩ so I left it at that. I think the less current through the tube the better. So the short answer is that I recommend 20MΩ.
https://sites.google.com/site/diygeiger ... -supported
It is all english, you will understand it better than me.