10J12S = 310A = WE310A tube. Pentode (Svetlana, Western Electric)
The 10J12C pentode is equivalent of Western Electric 310A (WE310A) was designed for high-frequency voltage amplification in long-distance wire service systems. The 10J12C pentodes are enclosed in glass bulb and are provided with an octal base and an indirectly heated oxide-coated cathode.
10J12S you can used in some Hi-Fi applications. Perfectly sounding.
All tubes new, military equipment and have "OTK" mark. Near equivalent: WE310A.
The tube is manufactured by the Svetlana, St. Peterburg, Russia.
Filament voltage, B: 10 ± 0,7
Filament current, mA: 320
Anode voltage nominal (DC), V: 250
Anode voltage limit (DC), V: 250
Anode, mA: 5,5 ± 1,5
First nominal grid voltage (DC), V: minus 3
Backlash first, uA: 0.5
Second nominal grid voltage (DC), V: 135
A second threshold voltage grid (DC), V: 180
Grid current second, mA: 1,05 ± 0,55
Third nominal grid voltage (DC), V: 0
Withstand voltage between cathode and heater, V: 150
Leakage current between the cathode and heater, uA: 20
Insulation resistance of the anode, mOm: 20
Insulation resistance of the grid of the first, mOm: 20
Slope, mA/V: 1,85 ± 0,25
Slope at a current 300 mA filament, mA/V: 1.45
The maximum power dissipation at the anode, W: 1.9
The maximum power dissipated in the second grid, W: 0.4
Output power, W: 0.4
Total harmonic distortion less than: 14%
The internal resistance of, ohms: 500
Input capacity, pF: 5,8 ± 1,2
Output Capacity, pF: 12,5 ± 3,5
Capacitance checkpoint, pF: 0.03
Criterion of durability:
- transconductance, not less than, mA/V: 1.3
- backlash first, no more than, mkA: 1.5
Weight 50 g
- temperature from -60 to +70 ° C
- relative humidity of 95-98% at +20 ° C
- mechanical vibration loads
Time life 6000 hours
All datasheets here.