This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the time, and two transformers are used. The input has 10k impedance and is powered by 12 V.
This circuit consists of an ultrasonic transmitter for alarm found in an Italian magazine...
With this oscillator we can obtain a signal of 10 W of power at the frequency of 100kHz. The...
Found in a 90s EDN, this circuit uses components from that time. The circuit supplies a current of...