High quality replacement oscilloscope probe set with insulated BNC connector. A passive, high impedance oscilloscope probe designed and calibrated for use on instruments having an input impedance of 1Mohm shunted by 25pF. However, it may be compensated for use with instruments having an input capacitance of 10 - 35pF. The probe incorporates a two position slide switch in the head which selects attenuation of X1, X10 position.