We found this circuit in an English publication from the 1980s. The circuit uses current components and can be tuned for frequencies between 300 and 1500 Hz.
The current can be kept constant in the load circuit using the integrated regulator LM350. The...
Found in older documentation this setting applies to modern components, noting that the power...
This circuit is suggested by American documentation from 1970. It makes use of transistors of the time...