This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.
We found this simple timer in a Raytheon documentation from the 60s. The transistor is made of...
This amplifier uses common transistors and provides a power of 2 watts in a speaker of 4 to 8...
Published in Radio Electronics magazine in May 1963, the purpose of this circuit is to visualize the...