This oscillator version is from an RCA documentation from the 1970s. Transistors support modern equivalents and the power can be supplied in a voltage range of 5 to 12 V. For Q2 we suggest the BD136.
This general-purpose transistor amplifier stage was found in the November 1993 issue of...
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is based...
Found in an Electronics Now from the 90s, this application uses an integrated circuit from the...