Charge sensitivi type 10 to 12th v/coulomb 0.16 microvolt/ion pair 46millevolts/mev for argon-methane counters, input negative pulse, output positive pulse 50 ohm capacitance, saturated output voltage p12 v and n2 v unterminated, decay time constant 100 microsec, 1ntegral nonlinearity less than 0.5 pc, stabili type 0.5 pc