With this circuit from the September 1989 issue of Radio Electronics magazine, it is possible to receive VLF band signals on a common radio, just like the signals emitted by the previous receiver.
This circuit generates high pulses from a sinusoidal input, using SCRs for this purpose. The...
This amplifier was found in an Electronics Now from the 90s. The FETs are part of a CD4007CB. |...
This circuit, which also serves to amplify FM signals from an external antenna, was found in the...