This circuit, for vehicles with a 6 V battery, was found in the 1964 RCA transistors manual. Transistor 2N3054 can be replaced by a TIP41.
Using two common operationals, such as 741, this circuit serves as a medium control in an...
The crystal in this circuit can have frequencies from 100kHz to 8MHz. Capacitor C2 adjusts the...
This circuit is from a magazine 73 for radio amateurs of the 90s. The circuit generates the high...