In this work, a nuclear spectroscopy amplifier was developed to construct a smaller and cheaper an electronic device with low electronic noise, fast rise and fall times, insensitive to overload and temperature degradation, operation at hight count rates, maximum performance according to commercial nuclear amplifiers and without using any NIM module. The developed amplifier shaped the pulses coming from the detector via preamplifier in a suitable form. Semi-Gaussian pulses, which have time constant of 2 μs, were obtained from the output of the amplifier. It operated with the voltage of ±15 V and the current of ±40 mA. The noise reflected to its input was lower than 4μV (eff.). It accepted the pulses with unipolar and bipolar shapes through the coaxial cables of 50, 75 or 93 ohms by decreasing the output impedance, and it had a maximum gain level of 1,280. With these specifications, it was believed that anyone could construct this type nuclear amplifier with low cost and ease. The results obtained from the amplifier were compared with the results of the amplifiers available commercially. They were highly compatible with the results from the commercial ones.