This transistorized circuit appeared in a Radio Electronics magazine in March 1958. The frequency range depends on the tuned circuit, being within a few megahertz.
The frequency of the signal produced by this circuit depends on the temperature of the diode used...
This small transistor radio was published in Radio Electronics magazine in November 1957. The...
This simple adjustable source uses a PNP transistor that can be the BD136 for even slightly higher...