Found in a 1975 radio amateur publication, this simple oscillator is for code practice. The PNP transistor may be the BC558 and the NPN or the BC548. The power supply can be made with voltages from 6 to 9 V. The tone is set in the potentiometer.
Found in a 1975 radio amateur publication, this simple oscillator is for code practice. The PNP transistor may be the BC558 and the NPN or the BC548. The power supply can be made with voltages from 6 to 9 V. The tone is set in the potentiometer.
