This circuit was found in the February 1971 issue of Radio Electronics magazine. It is designed to power the previous circuit, providing a maximum current of around 50 mA.
This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of...
This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and...
We find this circuit in an earlier American publication of 1978. The components are no longer...