N° of component 

Audio Oscillator (CB457)

Hartley oscillator operates in the audio range. Frequency can be adjusted by P1 and also depends on C1 and C2. These capacitors can be changed to achieve the best performance. T1 is is a small output transformer found in transistor radios. Types with primary impedance between 200 and 2,000 ohm can be used. Any NPN transistor can replace the BC548.


Audio Oscillator
Audio Oscillator




Circuit Bench