We found this circuit in a magazine 73 from the 90's. It is a circuit indicated for radio-amateur transmitters with the frequencies determined by the sets of coils.
The circuit presented with low drift is from the Motrorola LinearDatabook of 1990. The circuit...
The previous circuit (CB15629E) can be changed to generate a sawtooth signal synchronized...
This dual adjustable power supply was found in the June 1990 issue of Radio Electronics magazine....