Found in a Popular Electronics from the 90s, this amplifier uses an integrated circuit from the time. The circuit operates from the LF band up to 600 MHz with a gain of 16 dB.
Crystals from 100 kHz to 1 MHz can be used in this 1957 Raytheon circuit. 4 can have values...
Assembled with SMD components this circuit can be very small. The range is a few tens of meters. We...
This circuit can provide a voltage of up to 900 V depending on the input voltage. The diodes must...