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.
An stable multivibrator with 50% of duty cucle can be mounted using the 555 as shown by the...
This circuit was found in the old Mullard transistor reference manual from 1960. The circuit uses...
We found this circuit in a 1976 documentation. The transistor and the integrated circuit must have...