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Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 0
Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 1
Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 2
Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 0
Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 1
Tested working 1 SBM-20 Geiger counter tube NOS gm tube radiation detector, US $15.00 – Picture 2

Tested Working 1 Sbm-20 Geiger Counter Tube Nos Gm Tube Radiation Detector

US $15.00

  • Evansville, Indiana, United States
  • May 10th
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These SBM 20 tubes are NOS, Tested all work fine. Your bid is for 1 tube.   HARD BETA and GAMMA GM DETECTOR TUBES Vintage Made in USSR during the 80's for the Soviet Military Needs Genuine Russian Military Surplus <> TESTED with real radiation sample <> Condition - NOS, Never Used This auction is for 1 (one) randomly selected piece per bid! GENERAL SPECIFICATIONS Parameters SBM-20 Gas Filling Ne + Br2 + Ar Cathode Material Stainless Steel, 50 mkm Maximum Length (mm) 108 / 101 Effective Length (mm) 91.0 / 83.5 Maximum Diameter (mm) 11 Effective Diameter (mm) 10 Connector Pin Operating Temperature Range 0C -60 to +70 WALL SPECIFICATIONS Parameters SBM-20 Areal Density (mg/cm2) 40 Thickness (mm) 0.05 ELECTRICAL SPECIFICATIONS Parameters SBM-20 Minimum Anode Resistor (meg ohm) 1.0 Recommended Anode Resistor (meg ohm)    circuit diagram 5.1 Recommended Operating Voltage (volts) 400 Operating Voltage Range (volts) 350 - 475 Initial voltage (volts) 260 - 320 Plateau length (volts) at least 100 Maximum Plateau Slope (%/100 volts) 10 Minimum Dead Time (at U=400V, micro sec) 190 Working range (mkR/s) 0.004 - 40 Working range (mR/h) 0.014 - 144 Gamma Sensitivity Ra226 (cps/mR/hr) 29 Gamma Sensitivity Co60 (cps/mR/hr) 22 Inherent counter background (cps) 1 Tube Capacitance (pf) 4.2 Life (pulses) at least 2*1010 Weight (grams) 10 / 9  
“may have small imperfections from shipping and storage .”
Model sbm 20 cbm 20
Country of Manufacture Ukraine
Country/Region of Manufacture Ukraine

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