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.
The circuit shown in the figure generates a rectangular signal that depends on R and C, when its...
This Radio Electronics circuit, in an 80's edition, decodes the 67 kHz signal used at the time to...
The transistors of this circuit may be general purpose and the power supply comes from the TTL...