This simple source uses two 2N3055 transistors that must be equipped with good heat sinks. The source has no protection, only an input fuse. The diodes are for 5 A x 50 V or more.
This transistorized “grid dip” oscillator was found at Radio Electronics in June 1953. The...
This circuit has a very traditional configuration that can be found elsewhere on the site. R2 and...
This high input impedance amplifier stage was found in a 1963 documentation. The transistor...