The STS-5 is almost identical in construction and function to the ever popular SBM-20 tube. It was made by a different Soviet factory and has nearly the same function and specifications. For more details about this tube, refer to the SBM-20. https://www.youtube.com/watch?v=__tjvi61nFM and http://cognito.me.uk/science/rh-electronics-myGeiger-review/ An industry standard, the STS-5 and the SBM-20 are used in a great many modern Geiger counters around the globe. These two tubes never go out of fashion.
STS-5
$44.95Price
- Cathode Material: 446 Stainless Steel
- Anode Material: Tungsten
- Construction: Steel Envelope (functions as cathode outer wall)
- Length: 110mm (4.33”)
- Diameter: 12mm (0.472”)
- Recommended Anode Resistor: 5.1m
- Starting Voltage: 280-330v
- Recommended Operating Voltage: 400v
- Operating Voltage Range: 360-440v
- Sensitivity: Gamma and Beta
- Lifetime (est.): 2 x 10(10) (20 billion /634 years at normal background CPM)
- Background CPM: 25-40 (in the Los Angeles/Southern California area)