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.
This circuit is like the previous one except that it can be triggered electronically. The circuit is...
Found in 90s Radio Electronics, this audio indicator makes use of an integrated circuit that is...
Found in the October 1992 Radio Electronics magazine, this oscillator is controlled by switch S1....