This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The transistor must be mounted on a heatsink and the transformer is a 1,5A secondary winding.
This circuit is from 1980s documentation. The maximum operating frequency is 3.5 MHz. The current of...
This automotive circuit was found in the April 1971 Radio Electronics magazine. The relay is 12 V...
This signal booster that ranges from long waves to about 30 MHz is recommended to be used with...