This transistor gain test was published in Radio Electronics magazine in July 1959. The transformer used is a special type common at the time. The circuit tests general-purpose transistors.
I found this circuit in a 1993 technical documentation. When we press the switch in parallel with...
Found in 1980s Electronic Engineering, this circuit uses common phototransistors as sensors. The...
This power supply was found in the December 1970 issue of Radio Electronics magazine. The...