This servo circuit was found in 1969 Motorola documentation. Integrated circuits and transistors are types of the time, hard to find today.
In the figure we have an application for NLAS5113, a new device from on Semiconductor...
We found this phonographic transmitter for the MW band in a 1956 documentation. The circuit has a...
The circuit shown below was obtained from an Italian magazine Sperimentare from 1977. All...