This circuit was found in the 1990 Motorola Dataar Linear. We can mount it with more modern equivalent transistors. Output transistors shall be provided with heat radiators.
We found this transistor siren in an old English publication. The transistors are from the era,...
This VCO with a common operational amplifier was found in an old American documentation. The...
This circuit was found in a May 1981 Radio Electronics magazine article. The circuit is offset...