This benchtop equipment was found in Radio Electronics magazine from April 1960. The two double valve circuit is powered from mains power.
We found this circuit in a 1970 publication by General Electric. The components can be changed...
This high-Q low-pass filter was found in the October 1990 issue of Radio Electronics magazine. The...
Generating a square signal (50% active cycle), this circuit was found in Siliconix documentation from...