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 circuit was found in an Electronic Design from the 90s. The integrated circuit is from that...
This circuit is from a 1980 publication. In it we have a half-wave power control in which the SCR...
We found this circuit in a Radio Electronics from February 1966. The transistor is from the time...