This 2.5 A power supply was found in a 90's QST magazine. The power transistor must be mounted on a heatsink.
We found this circuit in a 1967 Electronics World. It analyzes a transistor by determining its...
This circuit monitors the output level of an amplifier. The circuit is set to R4 and can be...
Originally designed for an incandescent lamp, this flasher or pulser can be adapted to operate with...