Found in a Popular Electronics from the 90s, this circuit generates signals from 2 Hz to 30 kHz in different bands. The circuit can be powered by voltages from 5 to 12 V, depending on the application.
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...
The circuit shown in the figure is a more sensitive version of the previous one (CB16105E). Two...