This oscillator uses a small IF transformer taken from an old transistor radio. FET admits equivalents. The circuit can be used to calibrate radios.
This traditional dimmer configuration with SCRs, but with full wave control was found in a 1988...
Found in a 2005 Linear Technology application manual, this circuit provides outputs from a current...
This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics...