Found in a 90s QST magazine, this circuit uses components from that time. No information is given about the transformer.
This circuit is from a 1992 publication. The transistors can be the BC549 or BC548 and the power...
This low-pass circuit was found in the December 1990 issue of Radio Electronics magazine. The...
September 2016 - It can be obtained from Mouser Electronics the new inductors for power supply of...