We found this circuit in a Radio Electronics from April 1965. The components are from the time and the power supply is for 12 V cars. The transistor must be equipped with a good heat radiator.
Found in American documentation from the 1970s, this circuit employs an integrated circuit from...
This transmitter uses a small loudespeaker (FTE) as microphone and can send the signals to...
We found this circuit in a 1977 publication. With it we can test general purpose operational...