A low cost pulse height analyze with ease of maintenance and less complexity of electronic circuitry and operation together with other nuclear measuring facilities is developed. The multichannel analyzer (MCA) employs the Wilkinson type analog to digital converter (ADC) working at 50 MHz with a conversion gain of 1024 channels and a counting capacity of 10[superscript 16]-1 counts per memory channel. The digital signals from the ADC are processes through XT slot on microcomputer IBM PC AT/XT under the control of a program called MCA-NT01 of 26773 bytes. The test result shows that the MCA works works with proportional counters as well as scintillation detectors like NaI(Tl). High voltage supply can be adjusted from 0 to 200 V with a maximum current o 100 uA and a ripple voltage less than 50 mV. Pulse amplification can be varied continuously up to 100 times resulting a unipolar pulse of 4 uS pulse width ranging from 0 to 10 V with a good linearity at the output. The linear correlation of the analog to digitalconversion is 0.999. The MCA is capable to analyze nuclear spectrum with a resolution suitable for teaching as well as for basic research.
