Found in a publication for radio amateurs from the 1980s, this circuit amplifies signals in the 60 kHz band (VLF), Winding data from the ferrite antenna are provided along with the diagram.
This circuit is indicated to function as a receiver of the previous circuit. The circuit is from...
We found this time base circuit in a timer project from the August 1972 Radio Electronics...
This basic op amp filter configuration was found in July 1975 Radio Electronics magazine. The...