STUDY OF HARTLEY & COLPITT’S OSCILLATORS SPECIFICATIONS: 1) Facility to perform experiment on Hartley, Colpitt’s & Phase Shift Oscillators. 2) Baising Voltage : +12 V DC. 3) Design of Oscillators : Passive Elements with NPN Transistors. 4) Power supply requirement : 230V AC, 50 Hz. 5) Built in of IC based Power supply. 6) All parts is provided on Single Panel with connecting terminals. 7) High quality components. 8) Powder coated Metal Box. 9)User Manual with practical and circuit diagrams & patch cords.