This shortwave preselector was found in the July 1994 issue of Radio Electronics magazine. The circuit is suitable for telescopic antennas, matching the impedance with the receiver used.
This 1 kHz triggered oscillator was found in an Electronics Now from the 90s. The circuit fires off...
This circuit, suggested by an Electronics World of 1969, keeps a blinking LED for a while when a...
This relay circuit with a dual channel MOSFET (not very common today) was found in an old American...